Question

i)A basic oxide insoluble in water ii)A hydroxide which is highly soluble in water iii)A base which is not an alkali iv)a weak mineral acid iii)2 strong alkalis

Answer 1

(1)CuO (2)sodium oxide (3)copper hydroxide (4)carbonic acid (5)Na,K

Answer 2

a) A basic oxide that is insoluble in water is copper-oxide (CuO), as the oxygen in copper-oxide is tightly bounded due to highly electrostatic forces.

b) A hydroxide which is highly soluble in water is NaOH or Sodium Hydroxide

c) A base which is not an alkali is CuO or copper oxide, as copper oxide will dissolve or react with acid due to its basic nature, but will not dissolve in water.

d) A weak mineral acid is carbonic acid, due to low production of H^+ ions upon dissociation.

e) Name of two strong alkalis are Sodium Hydroxide (NaOH) and Potassium Hydroxide (KOH), due to their complete ionization.