Acid-Base Titrations

Question 1

Indicator for Vinegar/Ethanoic Acid Titration

Answer 1

Phenolphthalein

Question 2

Colour Change of Ethanoic Acid

Answer 2

Pink to colourless

Question 3

What two titrations are required to standardise a sodium hydroxide solution

Answer 3

Anhydrous sodium carbonate titrated with HCl

acid with NaOH solution

Question 4

Standardised

Answer 4

The concentration was found through another titration

Question 5

Indicator and Color Change for Washing Soda Titration

Answer 5

Methyl Orange

Orange to Pink

Question 6

Primary Standard

Answer 6

A solution that can be used to make up a solution of known concentration

Question 7

Indicator for HCl and sodium carbonate

Answer 7

Methyl Orange

Orange to Pink

Question 8

Why was the vinegar diluted?

Answer 8

It was too concentrated

It would require very concentrated NaOH solution

Question 9

Primary standard to standardise hydrochloric acid

solution

Answer 9

anhydrous sodium carbonate (Na2CO3)

Question 10

Indicator for hydrated sodium carbonate crystals

Answer 10

Methyl Orange

Orange to Pink

Question 11

Why is it important to fill the part below the tap of the burette?

Answer 11

Some of measured volume replaces the air