Experiment 4

Question 1

An acid is a proton ______

Answer 1

Donor

Question 2

A base is a proton ______

Answer 2

Acceptor

Question 3

What is he product of a reaction of an acid with a base?

Answer 3

A salt

Question 4

Example of acid

Example of base

Answer 4

Acid- HNO3

Base- NaOH

Question 5

In which solution is phenolphthalein colourless? Pink?

Answer 5

Colourless- acidic solution

Pink- basic solution

Question 6

What are the two volumetric primary standards?

Answer 6

Benzoic acid- C6H5COOH

Phthalic acid- KC8H5O4

Question 7

How do we accurately determine the mass of a base in a solution?

Answer 7

Put in a volumetric primary standard like KHP (KC8H5O4) and have the mole ratio at one to one with the base and use that to find the moles of the base and then mass

Question 8

How is vinegar produced?

Answer 8

Commercially by a bacterial oxidation of a dilute aqueous solution of ethanol

Question 9

How much acetic acid does household vinegar contain? Pickling vinegar?

Answer 9

Household- 5% CH3COOH by volume

Pickling- 7% CH3COOH by volume

Question 10

How do you find the concentration of acetic acid in vinegar?

Answer 10

Titrate a known volume of the vi what solution with a standardized aqueous solution oh NaOH
This has molar ratio of 1:1 so use that to find the moles

Question 11

What is the overall reaction for the determination of the acetic acid content of the vinegar

Answer 11

CH3COOH(aq) + NaOH(aq)-> CH3COO-Na+(aq) + H2O (l)