Structure of Equations

Question 1

Metal (s) + acid (aq)

Answer 1

Salt (aq) + hydrogen (g)

Question 2

Metal hydroxide (aq) + acid (aq)

Answer 2

Water (l) + salt (aq)

Question 3

Metal oxide (s) + acid (aq)

Answer 3

Salt (aq) + water (l)

Metal oxide - base (insoluble)

Question 4

Metal carbonate (s) + acid (aq)

Answer 4

Carbon dioxide (g) + water (l) + salt (aq) 
Metal carbonate  = base