1. The printed label on a bottle of commercial vinegar statesthat the acetic acid concentration is 5%.
(a) If the manufacturer had reported two significant figures inthe concentration, what would the percentage range be so that allvalues would round to 5%?
(b) Calculate the concentration in molarity of the upper andlower values from (a). The molecular weight of acetic acid is 60.05g/mol. How many digits can you report in your answers?
(c) What assumption did you make to calculate the concentrationsin part (b)?
(d) What is the percentage difference in the concentrations youcalculated in part (b)? Explain what value you chose for thedenominator in this calculation?
2. Acetic acid is a monoprotic weak acid with a pK_a of4.74.
(a) What is the pH of 10 mL of a 5.0% solution?
(b) What is the pH of the solution if you now add 30 ml of waterto solution (a)?
3. How will the equivalence point volume differ if you titratethe two solutions in question 2? Explain your answer.
I know this is a lengthy question, but if you could providedetailed step-by-step solutions and explanations, I'd reallyappreciate it!
1. The printed label on a bottle of commercial vinegar statesthat the acetic acid concentration is 5%.
(a) If the manufacturer had reported two significant figures inthe concentration, what would the percentage range be so that allvalues would round to 5%?
(b) Calculate the concentration in molarity of the upper andlower values from (a). The molecular weight of acetic acid is 60.05g/mol. How many digits can you report in your answers?
(c) What assumption did you make to calculate the concentrationsin part (b)?
(d) What is the percentage difference in the concentrations youcalculated in part (b)? Explain what value you chose for thedenominator in this calculation?
2. Acetic acid is a monoprotic weak acid with a pK_a of4.74.
(a) What is the pH of 10 mL of a 5.0% solution?
(b) What is the pH of the solution if you now add 30 ml of waterto solution (a)?
3. How will the equivalence point volume differ if you titratethe two solutions in question 2? Explain your answer.
I know this is a lengthy question, but if you could providedetailed step-by-step solutions and explanations, I'd reallyappreciate it!
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