Experiment 4 Flashcards Preview

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Flashcards in Experiment 4 Deck (11)
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1

An acid is a proton ______

Donor

2

A base is a proton ______

Acceptor

3

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

A salt

4

Example of acid
Example of base

Acid- HNO3
Base- NaOH

5

In which solution is phenolphthalein colourless? Pink?

Colourless- acidic solution
Pink- basic solution

6

What are the two volumetric primary standards?

Benzoic acid- C6H5COOH
Phthalic acid- KC8H5O4

7

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

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

8

How is vinegar produced?

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

9

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

Household- 5% CH3COOH by volume
Pickling- 7% CH3COOH by volume

10

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

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

11

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

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