Symbols, Formula and Equations

Question 1

What are the patterns of reactions?

Answer 1

Metal + Oxygen > Metal oxide
Metal + Cold water > Metal hydroxide + Hydrogen
Metal + Steam > Metal oxide + Hydrogen
Metal + Acid > Salt + Hydrogen
Metal oxide + Acid > Salt + Water
Acid + Base > Salt + Water
Metal carbonate + Acid > Salt + Water + Carbon dioxide

Question 2

What are the characteristics of ionic equations?

Answer 2

2 species.
No spectator ions present.

Question 3

Displacement reactions.

Answer 3

Mg + CuSO4 > MgSO4 + Cu
Ionic - Mg(s) + Cu(aq) > Mg(aq) + Cu(s)

Question 4

Neutralisation reaction.

Answer 4

NaOH + HCl > NaCl + H2O
Ionic - OH(aq) + H(aq) > H2O(L)

Question 5

Precipitation reaction.

Answer 5

BaCl2(aq) + Na2SO4(aq) > BaSO4(s) + 2NaCl(aq)
Ionic - Ba(aq) + SO4(aq) > BaSO4(s)