To hire a writers, fill the order instructions form & checkout—guaranteed a top college graduate to write your essay & NO AI-Plagiarism in the
final papers! Pursuing an 8-16 week course? The best in completing ace my homework & online class help, will assist you today!
Posted: September 24th, 2022
In fact, light of narrow wavelength ranges can be transmitted through a sample solution by utilizing an optical instrument, spectrophotometer. Normally, it is used in biological and chemical sciences to obtain the measurement of the amount of light absorbed by the solutes in the solution. Hence, concentrations of compounds in solution can be determined by using spectrophotometer because the amount of light absorbed is directly proportional to the concentration of absorbing compounds in the solution. Besides that, spectrophotometer functions as a tool to distinguish compounds because different compounds absorb light at different wavelengths.
Yes, if you have worked with a writer before, you can request them again for consistency and familiarity with your needs. This ensures a smooth, tailored experience. Writer continuity helps maintain consistent style and understanding of your preferences. Browse profiles or contact support to make your choice. Essay writer relationships build over time for increasingly personalized academic support.
There are a few methods which can be used to measure the amount of light absorbed by different solute in a sample solution.
(I)
Transmittance (T) refers to the amount of light transmitted through a sample solution. Its formula is
T = I/I0
We assign writers immediately and monitor progress, with backup plans to guarantee your paper arrives on schedule. Your deadlines are our priority. Our project tracking system alerts us to potential delays for proactive intervention. Rest assured, we will deliver when you need it. My assignment help includes stringent deadline monitoring for reliable punctual delivery.
%T = 100 x T
I represents the incident light whereas I0 represents the energy of light transmitted through the solution.
Absorbance (A), which is called optical density formerly [2], represents the amount of light absorbed by a solution which is related logarithmically to transmission by the
A = 0 / I
Our writers craft thoughtful reflective essays, blending personal insight with academic structure to meet your goals. We capture your voice perfectly. Reflective writing requires balancing personal experience with scholarly analysis. Share your story or guidelines to get started. Research study bay professionals excel at combining personal narrative with academic rigor.
At the end, A = 2 –
(II)
According to Beer Lambert Law,
Absorbance, A = lbc
l, which is called extinction coefficient formerly [2], represents the molar absobtivity coefficient in L mol-1cm-1, a constant for a particular compound, different compound has different molar absorbtivity.
Every paper is reviewed by editors for accuracy, style, and originality, ensuring it meets high academic standards. We use advanced tools to guarantee quality. Our multi-tiered review system includes both automated checks and expert human evaluation. Your paper will exceed expectations every time. Paper writing quality assurance involves multiple verification stages before delivery.
b represents the path length (cm), the path length of the cuvette in which the sample is contained.
c represents the concentration of the compound in solution, in mol L-1
This shows that there is a relationship between molar absobtivity, path length, molar concentration in Beer Lambert Law [1].
Furthermore, concentration of a solution can be calculated by using Beer-Lambert Law if its molar absobtivity coefficient is known. The equation that has been rearranged can be used to calculate the molar absobtivity. The equation is
l = A/bc
Yes, provide your sources or let our writers find credible ones, properly cited to support your paper. Every source is cited perfectly. We integrate your required readings seamlessly while maintaining academic citation standards. Share your materials in the order form for best results. Assignment writer expertise ensures proper source integration and citation accuracy.
Besides that, concentration of different compounds in a mixture can be determined by using Beer-Lambert Law. If there are presence of two compounds in a solution, the total absorbance at any specified wavelength of the solution is the sum of the two separate contributions as the formula shown below
Atotal = K1C1 + K2C2
C1 and C2 represent the concentrations of each compound in the mixture
K1 and K2 represent the molar absobtivity coefficient of each compound of the respective wavelength.
To determine the wavelength of maximum absorption, Amax, of bromophenol blue.
We create papers for MBA, law, or medical programs, with writers who understand their unique requirements. Our expertise ensures top-quality results. Professional programs demand industry-specific knowledge and specialized writing conventions. Provide your program details for a customized paper. Ace tutors with professional credentials deliver field-appropriate academic writing.
To construct a standard concentration curve for bromophenol blue.
To determine the concentration of the unknown bromophenol blue solutions.
To determine the concentration of two different solutes, bromophenol blue and methyl orange, in a mixture.
In brief, through this experiment, the things that I have learnt are:
We follow any formatting rules, from specific fonts to citation styles, ensuring your paper meets all guidelines. Precision is our promise. Complex formatting includes margin specifications, heading hierarchies, and style guide compliance. Provide your formatting details for flawless execution. Research essay service attention to detail covers every formatting requirement precisely.
the use of spectrophotometer
the use of micropipettes
absorption spectra
absorbance and concentration
Our writers hold degrees in their fields, ensuring deep knowledge and precise handling of specialized topics. This guarantees a high-quality, tailored paper. Subject expertise ensures accurate terminology and current understanding of field developments. Trust us to match you with the right expert. Essay helper specialists bring authentic subject mastery to every assignment.
absorbance and concentration of different compounds in a mixture
Bromophenol blue, mixture of bromophenol blue and methyl orange solutions, micropipette, cuvette, test tubes, tips.
The experiments were carried out according the procedures described in the practical manual.
The distilled water was filled into a cuvette (used as blank) and the clear surface of the cuvette was cleaned by using paper towel.
We craft concise, persuasive policy briefs, backed by research and tailored to influence your audience. Our writers deliver impactful arguments. Policy briefs require strategic framing and evidence-based recommendations for decision-makers. Provide your topic for a compelling brief. Ace my homework extends to professional policy writing for public administration courses.
The wavelength of the spectrophotometer was set to 470nm.
The cuvette with distilled water was placed into the spectrophotometer and was set to read zero.
The blank was removed and replaced with another cuvette containing the bromophenol blue.
The absorbance reading was recorded in Table 1.1.
Revisions are completed within 24 to 48 hours, with rush options to meet urgent deadlines without delay. We act fast to keep your paper on track. Our efficient revision process prioritizes quick turnaround while maintaining quality standards. Submit your revision requests through your account for quick results. My assignment help includes rapid revision services for time-sensitive adjustments.
Steps 2 to 5 were repeated with wavelengths 500, 530, 560, 590, 620, 650, and 680nm.
The reading at each wavelength was re-zeroed by using the blank.
The readings obtained were used to plot a graph of absorption spectrum (absorbance readings versus corresponding wavelength).
The wavelength with maximum absorbance reading was determined from the graph.
We handle assignments for online courses, adapting to digital formats and specific platform requirements. Our writers ensure seamless integration with your course. Online course assignments often have unique submission formats and discussion requirements. Upload your assignment details to get started. Paper writing for online education accommodates various learning management systems.
The mixtures of tubes 1-6 were prepared according to the Table 1.2a.
The contents of each tube were mixed by using a vortex mixer.
The spectrophotometer was set to the Amax wavelength for bromophenol blue that had been determined in part 1.
The absorbance reading was zeroed by using the content in tube 1.
The absorbance readings of tubes 2-6 were measured by using the same cuvette used for Tube 1.
Your personal and order details are encrypted and never shared, ensuring total privacy and security. We prioritize your confidentiality at every step. Bank-level encryption protects all transmitted data from unauthorized access. Your information is safe with us. Assessment help security protocols safeguard all student information comprehensively.
The absorbance readings were recorded in Table 1.2a.
The samples were not discarded after taking readings, but were returned to the original test tubes.
The concentrations of the bromophenol blue solutions in tubes 1-6 were calculated. The calculations were recorded in Table 1.2a.
A standard concentration curve of absorbance versus concentration of bromophenol blue was plotted.
The molar absorbtivity coefficient of bromophenol blue at Amax of bromophenol blue was determined (in unit L mg-1cm-1, as described in Beer Lambert’s Law ) by using the standard concentration curve from step 9.
Our writers produce sharp critical analyses, evaluating sources and arguments with academic precision. We bring clarity to complex ideas. Critical analysis requires both comprehension and evaluation of underlying assumptions. Share your topic for an insightful analysis. Research study bay expertise delivers sophisticated critical thinking in every analysis.
The absorbance of the two bromophenol bue solutions (Tubes A & B) of unknown concentration were measured at the Amax of bromophenol blue.
The distilled water was used as blank to zero the absorbance reading before the absorbance of the unknown solutions was measured.
The results were recorded in Table 1.2a.
The concentration of the two unknowns was determined by using (1) the standard concentration curve from Part 2 and (2) using the formula of Beer-Lambert Law. The calculations were shown in the report. The results obtained from these two methods were compared.
Our support team is here 24/7 via chat, email, or phone, ready to help with any order concerns. We are committed to your success. Multiple communication channels ensure you can reach us through your preferred method. Reach out anytime for assistance! Essay writer support connects you with help whenever questions arise.
The mixtures of tubes 1-6 were prepared according to Table 1.2b.
The contents of each tube were mixed by using a vortex mixer.
The spectrophotometer was set to the Amax wavelength of methyl orange which is 460nm.
The absorbance reading was zeroed by using the content in tube 1.
The absorbance readings of tubes 2-6 were measured by using the same cuvette that used for tube 1.
We combine qualitative and quantitative methods in research papers, delivering balanced, rigorous results. Our writers ensure depth and accuracy. Mixed-method approaches require expertise in both statistical analysis and qualitative interpretation. Provide your research needs for a tailored paper. Assignment writer proficiency spans diverse research methodologies for comprehensive studies.
The absorbance readings were recorded in Table 1.2b.
The samples were not discarded after taking readings, but were returned to the original test tubes.
The concentrations of the methyl orange solutions in tubes 1-6 were calculated. The calculations were recorded in Table 1.2a.
A standard concentration curve of absorbance versus concentration of methyl orange was plotted.
The molar absorbtivity coefficient of methyl orange at 460nm (in unit L mg-1cm-1, as described in Beer Lambert’s Law) was determined by using the standard concentration curve from step 9.
Beer-Lambert Law was used in this part.
Atotal = K1 C1 + K2 C2
Yes, free revisions are available within 7 days to ensure your paper meets all your expectations. We are here to make it perfect. Our revision policy covers both minor adjustments and substantial changes as needed. Submit your feedback through your account. Ace tutors remain committed to revision support until complete satisfaction.
There are two variables, C1 (concentration of bromophenol blue, BB, i.e. CBB in the mixture) and C2 (concentration of methyl orange, MO, i.e. CMO in the mixture). Hence, two equations are needed to be generated and solved simultaneously. The equations are as below:
Ac at Amax BB = KBB at Amax BB CBB + KMO at Amax BB CMO …………. 1
Ac at Amax MO = KBB at Amax MO CBB + KMO at Amax MO CMO ………….2
Ac at Amax BB is the absorption of mixture C at Amax of bromophenol blue (BB)
Ac at Amax MO is the absorption of mixture C at Amax of methyl orange (MO) i.e. 460 nm
KBB at Amax BB is the molar absorbtivity coefficient of BB at Amax of BB
Our outlines include structure, arguments, and sources, providing a clear plan for your papers success. They keep your project focused and organized. Comprehensive outlines serve as blueprints that guide the writing process effectively. Request an outline with your order. Research essay service planning includes thorough outlining for organized writing.
KMO at Amax BB is the molar absorbtivity coefficient of MO at Amax of BB
KBB at Amax MO is the molar absorbtivity coefficient of BB at Amax of MO
KMO at Amax MO is the molar absorbtivity coefficient of MO at Amax of MO (460 nm)
The Amax of methyl orange is 460nm. The absorbance of the bromophenol blue solutions in Tubes 1-6 in Table 1.2a at the Amax of methyl orange was measured.
The results were recorded in Table 1.2a.
A standard concentration curve of bromophenol blue at Amax of methyl orange was plotted.
The molar absorbtivity coefficient of bromophenol blue at 460nm was determined.
The absorbance of the methyl orange solutions in Tubes 1-6 in Table 1.2b at the Amax of bromophenol blue was measured.
Our writers blend expertise across fields, crafting cohesive papers for complex, cross-disciplinary topics. We ensure every angle is covered. Interdisciplinary work requires synthesizing different methodological approaches and theoretical frameworks. Share your topic for a tailored approach. Essay helper versatility covers interdisciplinary subjects with integrated perspectives.
The results were recorded in Table 1.2b
A standard concentration curve of methyl orange at Amax of bromophenol blue was plotted.
The molar absorbtivity coefficient of methyl orange at the Amax of bromophenol blue was determined.
The absorbance of mixture C containing bromophenol blue and methyl orange (Tube C) was measured at both the wavelengths Amax of bromophenol blue and Amax of methyl orange (given as 460nm).
The readings were recorded in Table 1.3.
Table 1.4 was filled in.
The values obtained were substituted into equations 1 and 2. The equations were solved simultaneously to obtain the concentrations of methyl orange and bromophenol blue in mixture C.
0.202
0.241
3.7 0x 10-2L mg-1cm-1
We tailor papers to your academic system and language needs, ensuring clarity for international students. Our writers make academic work accessible. International students benefit from our understanding of diverse educational systems and conventions. Let us know your needs for a perfect fit. Paper writing support accommodates global students with culturally sensitive academic assistance.
2.80 x 10-4L mg-1cm-1
1.30 x 10-3L mg-1cm-1
7.56 x 10-2L mg-1cm-1
4.6 mg/ L
y1-y2: 0.37 -0 = 0.37
We work with your specific deadlines, prioritizing tasks to deliver quality papers exactly when you need them. Your schedule is our priority. Flexible deadline options accommodate both standard and non-standard timeframes. Specify your deadline in the order form. My assignment help scheduling flexibility ensures delivery aligned with your academic calendar.
x1-x2:
10-0 = 10
y1-y2:
0.013 – 0 = 0.013
x1-x2:
Progressive delivery is ideal for large projects like dissertations, delivering your paper in sections for review. Pay in installments and provide feedback per part, ensuring alignment with your vision for just a 10% fee. This gives you more control and collaboration with your writer. Staged delivery reduces stress and allows for course corrections throughout the project. Ace my homework large projects benefit from phased delivery with ongoing feedback opportunities.
10-0=10
x1-x2:
10-0 = 10
y1-y2:
Absolutely! Share your teachers feedback, and within 7 days of receiving your paper, request a free revision via your account. If you want a different writer, we can arrange that with a small delay. Beyond 7 days, paid revisions are available—check your order page for details. We incorporate instructor feedback to ensure your paper meets specific expectations. Assessment help includes responsive revision services addressing professor comments directly.
0.756-0 = 0.756
Wavelength with Amax of bromophenol blue: 590nm
Calculations of concentrations [M1V1 = M2V2]
Tube 1
10 ( 0 ) = M2 (2.5)
M2 = 10 ( 0 ) / 2.5
Refer a friend, and you both get 5% off your next order—a win-win for sharing our services! It is our way of saying thank you for spreading the word. Our referral program rewards you for recommending quality academic support to peers. Check your account for referral details. Research study bay referral benefits make quality academic support more affordable for everyone.
= 0 mg / L
Tube 2
10 ( 0.5 ) = M2 (2.5)
M2 = 10 ( 0.5 ) / 2.5
= 2 mg / L
Tube 3
10 ( 1.0 ) = M2 (2.5)
M2 = 10 ( 1.0 ) / 2.5
= 4 mg / L
Tube 4
10 ( 1.5 ) = M2 (2.5)
M2 = 10 ( 1.5 ) / 2.5
= 6 mg / L
Tube 5
10 ( 2 ) = M2 (2.5)
M2 = 10 ( 2 ) / 2.5
= 8 mg / L
Tube 6
10 ( 2.5 ) = M2 (2.5)
M2 = 10 ( 2.5 ) / 2.5
= 10 mg / L
Calculation of molar absobtivity coefficient,l of
bromophenol blue at Amax of bromophenol blue (590nm):
(0.37-0)/ (10 – 0) = 3.70 x 10-2 L mg-1 cm-1
bromophenol blue at Amax of methyl orange (460nm):
(0.015-0)/ (10-2.4) = 1.30 x 10-3 L mg-1 cm-1
methyl orange at Amax of methyl orange (460nm):
(0.756 – 0)/ (10-0) = 7.56 x 10-2 L mg-1 cm-1
methyl orange at Amax of bromophenol blue (590nm):
(0.0025-0.0008)/ (10-0) = 2.80 x 10-4 L mg-1 cm-1
Calculation of the concentrations of the bromophenol blue solutions of unknown concentration (Tube A and Tube B)
Using the standard concentration curve from part 2 (Figure 2)
Concentration of solution A = 6.3 mg/L
Concentration of solution B = 4.6 mg/L
Using the formula of Beer-Lambert Law
A = lbc c= A/lb
Concentration of solution A =
c = 0.234/3.70 x 10-2 (1)
= 6.32 mg/ L
Concentration of solution B =
c = 0.169/3.70 x 10-2 (1)
= 4.57 mg/L
Calculation of the concentrations of two different solutes, bromophenol blue and methyl orange, in mixture C
Ac at Amax BB = KBB at Amax BB CBB + KMO at Amax BB CMO …………. 1
Ac at Amax MO = KBB at Amax MO CBB + KMO at Amax MO CMO ………….2
0.202 = (3.70 x 10-2) CBB + (2.80 x 10-4) CMO…………. 1
0.241 = (1.30 x 10-3) CBB + (7.56 x 10-2) CMO………….2
From equation 1, CBB = (0.202 – 2.80 x 10-4CMO) / 3.70 x 10-2
Substitute CBB = (0.202 – 2.80 x 10-4CMO) / 3.70 x 10-2 into equation 2:
0.241=(1.30 x 10-3)[ (0.202 – 2.80 x 10-4CMO) / 3.70 x 10-2]+ (7.56 x 10-2)CMO………….3
Multiply equation 3 with 3.70 x 10-2:
8.917 x 10-3 = (1.30 x 10-3)[ (0.202 – 2.80 x 10-4CMO) + 2.7972 x 10-3 CMO
8.917 x 10-3 = 2.626 x 10-4 – 3.64 x 10-7 CMO + 2.7972 x 10-3 CMO
Then,
8.917 x 10-3 – 2.626 x 10-4 = – 3.64 x 10-7 CMO + 2.7972 x 10-3 CMO
CMO =[ 8.917 x 10-3 – 2.626 x 10-4]/ – 3.64 x 10-7 + 2.7972 x 10-3]
= 3.0944 mg/ L
= 3.09 mg/ L
Substitute CMO = 3.0944 mg/ L into equation 2
0.241 = (1.30 x 10-3) CBB + (7.56 x 10-2) (3.0944)
CBB = [0.241 – (7.56 x 10-2) (3.0944)] / (1.30 x 10-3)
=5.4334 mg/ L
=5.43 mg/ L
From the bell-shaped graph in Figure 2, the wavelength with maximum absorbance of bromophenol blue is 590nm. This value is taken from the peak of the graph. It means that bromophenol blue absorbs maximum light intensity at 590nm.
The concentrations of bromophenol blue and methyl orange are calculated by using the formula M1V1 = M2V2. M represents the concentration of the solution. V represents the volume of the solution.
(iii) Calculation of molar absobtivity coefficient,l
By using the concentrations of bromophenol blue and methyl orange, standard concentration curve of absorbance versus concentration of bromophenol blue and methyl orange can be plotted. Those graphs are drawn for the wavelength of 460nm and 590nm respectively. As a result, there are four graphs (Figure 2 to Figure 4) which have been plotted. Those graphs show that absorbance is directly proportional to the concentration of the solution. The molar absobtivity coefficient is the gradient of the graph because
A= lbc
Since b = 1,
A = lc
Y = mX
Since some of the points in Figure 2 to Figure 5 cannot pass through the straight line in the graph, a best fit line has been drawn by using Microsoft Office. There are a few reasons that result some of the points in the graph cannot pass through the best fit line which are:
The surface of cuvette is not wiped cleanly.
The solution of bromophenol blue or methyl orange is not mixed well with the distilled water.
There are two methods to determine the concentrations of the bromophenol blue solutions in Tube A and Tube B which are by using the standard concentration curve from Figure 2 and by using the Beer-Lambert law.
The results from these two methods are close to each other. However, since the results from using calculation of Beer-Lambert law ( A-6.32 mg/L, B-4.57 mg/L) contain two decimal places whereas the results from the standard concentration curve (A-6.3 mg/ L, B-4.6 mg/L) contain only one decimal place, the results from using calculation of Beer-Lambert law are more precise than the results from the standard concentration curve.
For this part of calculation, two equations formed from Beer-Lambert Law can help to get the concentrations of bromophenol blue and methyl orange in mixture C. The equations are:
Ac at Amax BB = KBB at Amax BB CBB + KMO at Amax BB CMO …………. 1
Ac at Amax MO = KBB at Amax MO CBB + KMO at Amax MO CMO ………….2
Concentrations of bromophenol blue and methyl orange in mixture C can be obtained by substituting the results obtained into the equations and solving them simultaneously.
In conclusion, molar absobtivity coefficient,l of bromophenol blue at maximum absorbance of bromophenol blue, bromophenol blue at maximum absorbance of methyl orange, methyl orange at maximum absorbance of methyl orange and methyl orange at maximum absorbance of bromophenol blue are 3.7 x 10-2 L mg-1 cm-1 ,1.3 x 10-3 L mg-1 cm-1, 7.56 x 10-2 L mg-1 cm-1 and 2.8 x 10-4 L mg-1 cm-1 respectively. Moreover, concentrations of bromophenol blue and methyl orange in mixture C are 5.43 mg/ L and 3.09 mg/ L respectively.
College students want the best grades in their courses and that’s our FOCUS
Our team consists of outstanding writers who have specialized knowledge in specific subject areas and are scholars experienced in academic research;custom paper writing following assessment task, assignment brief and grading rubric criteria. They hold at least a graduate degree—230 with Masters and MSN qualifications, experts carefully selected and trained to ensure the best final paper quality of our work. .
We’re dedicated to bringing on board top-notch writers who can provide excellent work at prices that make sense for college students; affordable papers for all the course subjects. Our goal? To give you the best bang for your buck without ever compromising on the quality of our essay writing services—or the content of your paper. We give special extra discounts for regular clients and also for long research papers, dissertations and capstone projects. #Don’t forget to use the DISCOUNT code in the COUPONS section of the order form before checking-out!.
The Online Homework Ace Tutors service guarantees that our final work is 100% original, researched, and expertly human-written. Our professional academic writers craft every custom essay and research paper from scratch, ensuring your assignment is tailored to your exact instructions. We are committed to delivering plagiarism-free and AI-free work to each university/college student's 'write my paper' request. To uphold this promise, we check every draft for any possible instances of duplication, wrong citation, grammar errors, and artificiality before we send it to you. Thus, you can always rely on us to write genuine and high-standard content for your essay assignments.
When you trust to place an order with Sample Essays, here is what happens: