Topic 8

Question 1

Purity + formulations

Answer 1

• impurities in a substance increases range of m.p. / b.p.
• formulations are precisely measured due to it’s function
• ratio and % reveal a product’s formulation

Question 2

PRACTICAL : Paper Chromatography

Question 3

Tests for gas

Answer 3

• damp litmus paper bleaches if CHLORINE is present
• glowing splint placed in test tube relights if OXYGEN in present
• blowing bubbles into limewater turns cloudy if CO2 is present
• a lit splint placed in test tube makes a squeaky pop if HYDROGEN is present