The wavelength of maximum absorbance of methyl red is closest to ___.   Question 20 options:   570 nm   617 nm   431 nm

2. Discuss the different factors that affect the absorbance of a solution.

Please do questions 2 and 3. Dont do it all, just show me how to solve one and I will do the rest.

3. What is the purpose of using blank before measuring the absorbance of a substance?

What procedures are utilized in optical analysis to determine a solution's concentration based on colorimeter absorbance measurements?

em1.png chem3.png Part 3: Q9 Average absorbance Flask 8 Flask 9 Flask 10 Flask 11 Part 3: Q9 Flask 8 Flask 9 Flask 10 Flask 11 Part 3: Q10 Flask 8 Flask 9 Flask 10 Flask 11 Q Part 3 0.146 [Fe] -0.002mol/L 0.166 volume 5.00mL 0.215 0.294 [FESCN mol/L) ✪ 4.59* 10 5.18*10* 6.64 x 10 9.08*10* [Fe(mol/L) 5.00 x 10 5.00*10* Y=3362x -0.0083 R¹ 0.9993 5.00 x 10 5.00*10* (Amounts of flask 8 (9 - 11's values are in the spreadsheet) 1:1 Ratio so, Molarity of Fe(NO3))3 = 0.2M Volume of Fe(NO3))3 = 5.00mL 71% Moles of Fe³= Molarity x volume(L) Moles of Fe = 0.2M × 0.005L = 1× 10-³mole 68% [SCN ](mol/ 4 x 10-4 5 x 10-4 7*10* 1*10* الخا chem2.png Concentration of Fe³ 9, X = mole of Fe³1x10³ mole Volume 0.0054 Ⓒ 8, Average absorbance for solution 8 (same for 9 - 11) Average absorbance for flask 8 = sum of all absorbances / number of readings (0.145 +0.147 +0.148) 3 Using equation of calibration curve's line(slope) of best fit, the average absorbances of the unknown concentrations to determine…

Examine the given Beer's law standard curve for an unknown dye measured in a 1.0 cm cuvette. Absorbance of Unknown Dye at 542 nm 0.5 E 0.45 0.4 0.35 0.3 0.25 0.2 y = 15200x - 0.018. 6 0.15 * 0.1 5.00E-06 1.00E-05 1.50E-05 2.00E-05 2.50E-05 3.00E-05 3.50E-O5 Concentration (M) What is the concentration (in M) of a sample of the unknown dye with an absorbance of 0.16 at 542 nm? Type answer: ВАCK Question 8 of 8 REVIEW A «tv A O Absorbance at 542 nm

Examine the given Beer's law standard curve for an unknown dye measured in a 1.0 cm cuvette. Absorbance of Unknown Dye at 542 nm 0.5 E 0.45 0.4 0.35 0.3 0.25 0.2 y = 15200x - 0.018 0.15 0.1 5.00E-06 1.00E-05 1.50E-05 2.00E-05 2.50E-05 3.00E-05 3.50E-05 Concentration (M) What is the molar absorptivity (in M-1cm-1) of the unknown dye at 542 nm? Absorbance at 542 nm

You want to figure out the caffeine concentration in a coffee you bought. You make four caffeine standard solutions of increasing concentration and fit the data. Your line fit has the following equation: y = 0.053(AU/mM) X + 0.0012AU You test your coffee sample and measure an absorbance of 0.82 AU. What is the concentration ○ 0.0042 mM ○ 0.0042 M ○ 15 mM ○ 0.043 mM ○ 15 M 0.043 M

Examine the given Beer's law standard curve for an unknown dye measured in a 1.0 cm cuvette. Absorbance of Unknown Dye at 542 nm 0.5 0.45 0.4 0.35 0.3 0.25 0.2 y = 15200x - 0.018. 0.15 0.1 5.00E-06 1.00E-05 1.50E-05 2.00E-05 2,50E-05 3.00E-05 3.50E-05 Concentration (M) What is the molar absorptivity (in M-1cm-1) of the unknown dye at 542 nm? Type answer: 0.25 Incorrect Absorbance at 542 nm