2. Hemoglobin is a protein that carries oxygen in the blood. It absorbs light strongly at awavelength of 400 nm, which gives blood its red color. A solution of hemoglobin is dilutedto 10 times its original volume (1.0 mL hemoglobin + 9.0 mL water). The diluted solutionhas an absorbance value of 0.354.a) Determine the absorbance value of the original solution. Explain how you arrived atyour answer.b) It would be simpler to measure the absorbance of the original solution directly.Explain why it is better to dilute the solution before measuring the absorbance for thissample.3. Why is it important not to touch the sides of the cuvette with your fingers?

The absorbance value of the original solution can be determined by considering the relationship…

Answered: 2. Hemoglobin is a protein that carries…

Organic Chemistry: A Guided Inquiry

2nd Edition

ISBN:9780618974122

Author:Andrei Straumanis

Publisher:Andrei Straumanis

Chapter12: Chirality

Section: Chapter Questions

Problem 10CTQ

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Similar questions

1.00 mL of 0.10OM NaOH is about 20 drops. How many milliliters of 0.100M NaOH are in 3 drops? (this is an estimation of the uncertainty in our volume at equivalanece point: we know that before the 3 drops were added we were not at equivalence yet, and after the 3 drops were added we were past it) 0.30 mL NaOH 0.15 mL NaOH
3.) In the assay of NaHCO3, 3.0g of the solid is dissolved in 25mL water. What is the normality? How many mL of 1N H2SO4 will be required to neutralize this solution? From this volume of acid, compute the percent purity of NaHCO3.
Ibuprofen (also known as Brufen) is an analgesic (pain killer) and anti-inflammatory drug. It is a weak carboxylic acid (Chemical Formula: C12H17C00H; K = 1.2 x 10-5). A Medical student from Lusaka Apex Medical University (LAMU) prepared a 0.4 M solution of Brufen to give to an accident victim with minor injuries but in a lot of pain. on i. Write a reaction equation showing how Brufen ionizes in water. ii. Write the acid ionization constant expression for Brufen iii. Calculate the percent ionization of Brufen in water Select one: O A C12H17COOH(ag) + H2OM → C12H17CO0'(aq) + H3O*(aq)} K = [C;;H1¬CO0"][H30*]. [C1,H17COOH][H=0] 0.55% %3D OB. + C12COO(ag) + H3O*(aq); K= [C1;;H17C00"][H,o*j. [C2H17COOH] C12COOH(a) + H2O¶ 0.55% C12COOH(ag) + H2O) → C12COO (aq) + H30*(aq), K = [C1;H3;C00"][H30*]. [C,2H17COOH][H=0] 0.0022 %3D [CH1,CO0"][H30*]. [C1H17COOH] Go O D. C12H17COOH + H2O C12H17CO0* + H3O*|K = 0.55% %3D
A road tanker carrying an acid was involved in an accident and its contents spilledon the road, iron drain covers began melting and fizzing as the acid ran over them. ASpecialist was called to se if the acid actually leaked into the nearby river.(a) Explain how the specialist could carry out a simple test to see if the river water contains some acid or not.(b) The word melting is incorrectly used in the report. Suggest a better name that should have been used.(c) Explain why drain covers began fizzing as the acid rain over them.
In a 4.9 mm aqueous solution of benzoic acid (C6H₂CO₂H), what is the percentage of benzoic acid that is dissociated? You can find some data that is useful for solving this problem in the ALEKS Data resource. O Round your answer to 2 significant digits. []% x10 X Ś |||
Can you suggest another method to calculate the concentration of [H*]?
13) What reagent would distinguish between Ba2+ and Pb2+? A) NaCl B) NANO3 C) Na2SO4 D) Na2S203 D What reagent could be used to separate Br from NO3- when added to an aqueous solution containing both? AAGNO3(aq) B) Ba(OH)2(aq) C) CUSO4(aq) D) Nal(aq)
Answer questions a through c: a. A CHEM 1215L student prepares a dilute solution of sodium hydroxide, NaOH(aq), starting with 6 M sodium hydroxide. She then titrates a 1.372 g sample of KHP with the dilute sodium hydroxide solution, NaOH (aq), to a phenolphthalein end point. If the titration required 21.84 mL of sodium hydroxide, NaOH(aq), calculate the molar concentration of the sodium hydroxide solution, NaOH (aq). (Remember that KHP is potassium hydrogen phthalate KHC8H4O4, NOT potassium hydrogen phosphorus!) b. The student uses the same sodium hydroxide to titrate 10.00 mL of vinegar to a phe- nolphthalein end point. If the titration required 27.48 mL of sodium hydroxide, NaOH (aq), calculate the molar concentration of acetic acid, HC2H3O2 (aq), in the vinegar. c. Calculate the mass percent of acetic acid, HC2H3O2 (aq), in the vinegar using the mo- lar concentration for acetic acid, HC2H3O2 (aq), determined in part band assuming the density of the solution is 1.01 g/mL.
The average blood pH is 7.40. The blood volume in humans, on average, is 5 liters. On average bicarbonate concentration in blood is 25 mM. A vinegar jar has a label that says its acetic acid concentration is 3.0%, meaning 3.0 g of acetic acid in 100 mL vinegar. (1) How many mL of vinegar does a person have to intake in order to lower the blood pH to 7.25? (2) if ALL the bicarbonate in 5.0 L of blood is neutralized by vinegar, how many mL of vinegar will be needed? (3) When all the bicarbonate ions are neutralized to carbonic acid, what will be the resulting blood pH? Note: pKa values for carbonic acid (diprotic acid) are 6.4 and 10.3, respectively.
7. What volume of 0.300M H2SO4 is required to exactly neutralize 200mL of 0.500M NaOH?2NaOH + H2SO4  Na2SO4 + 2H2O
d) please see attached question concentration KOH=20.8325mL pH solution=2.9 beginning of the titration, Vbase = 0.00 mL
Assuming that stomach acid is 0.150 M HCl (density, 1.00 g mL-1), what mass of acid would a 500 mg antacid tablet composed of Na2CO3 neutralize? (Hint: The neutralization reactions for Na2CO3 are similar to those written for CaCO3 in the Introduction.)

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