Chemistry CCEA AS Level 1.9 (Acid-base Titrations)

What is the formula for nitric acid?

HNO3

What is the formula for sulphuric acid?

H2SO4

What is the formula for hydrochloric acid?

HCl

What is the formula for phosphoric acid?

H3PO4

What is the formula for thiosulfuric acid?

H2S2O3

What is the formula for ethanoic acid?

CH3COOH

How is the strength of an acid determined?

Its degree of dissociation. Strong acids will fully dissociate and weak acids will only partially dissociate

What is the difference between a concentrated and a dilute solution?

A concentrated solution contains a large number of moles of solute per dm^3 whereas a dilute solution contains a smaller number of moles of solute per dm^3

What is the colour change seen in methyl orange?

- Red/orange in acid

- Yellow in alkali

What is the colour change seen in phenolphthalein?

-Colourless in acid

- Red in alkali

What is a standard solution?

A solution for which the concentration is accurately known.

How do you calculate unknowns from titration results?

1. Calculate moles

2. Ratio

3. Convert moles back to whatever is asked in the question

Why is a volumetric flask inverted?

To ensure a uniform concentration across the solution