Chemical equations

Question 1

Write a balanced chemical equation with state symbols: Iron reacts with oxygen to produce iron (III) oxide

Answer 1

4Fe (s) + 3O2 (g) -> 2FeO3 (s)

Question 2

Write a balanced chemical equation with state symbols: Aluminium hydroxide reacts with dilute sulfuric acid to form aluminium sulfate and water

Answer 2

2 Al(OH)3 (aq) + 3 H2SO4 (aq)-> Al2(SO4)3 (aq) + 6H2O (l)

Question 3

Aqueous potassium hydroxide reacts with sulfuric acid (neutralisation reaction)

Answer 3

2 KOH (aq) + H2SO4 (aq) -> K2SO4 (aq) + 2 H2O (l)

Question 4

Zinc powder reacts with dilute hydrobromic acid

Answer 4

Zn (s) + 2 HBr (aq) -> ZnBr2 (aq) + H2 (g)

Question 5

Iron (III) oxide powder reacts with dilute nitric acid

Answer 5

Fe2O3 (s) + 6 HNO3 (aq) -> 2 Fe(NO3)3 + 3H2O (l)

Question 6

Aqueous calcium hydroxide reacts with nitric acid

Answer 6

Ca(OH)2 (aq) + 2 HNO3 (aq) -> Ca(NO3)2 (aq) + 2 H2O (l)