Science YEE2 8th- Salts

Question 1

Metals react with acids to form:

Answer 1

salts and hydrogen gas

Question 2

Metal carbonates react with acids to form:

Answer 2

salts, water, and carbon dioxide

Question 3

Filtration

Answer 3

separate insoluble impurities from the salt solution

Question 4

Evaporation

Answer 4

remove the solvent (usually water) to obtain solid salt crystals

Question 5

Crystallization

Answer 5

formation of pure salt crystals from a saturated solution

Question 6

Salts

Answer 6

Composed of cations (positively charged ions) and anions (negatively charged ions)
Prepared through various chemical reactions

Question 7

zinc (Zn) metal reacts with hydrochloric acid (HCl) to form zinc chloride (ZnCl2) and hydrogen gas (H2).

Answer 7

Zn + 2HCl → ZnCl2 + H2

Question 8

calcium carbonate (CaCO3) reacts with sulfuric acid (H2SO4) to form calcium sulfate (CaSO4), water (H2O), and carbon dioxide (CO2).

Answer 8

CaCO3 + H2SO4 → CaSO4 + H2O + CO2