Question

Look at the reaction below.

H(aq) + Ca(OH)2(aq) —>CaSO4(aq) + 2H20(1)
Which substance is the base in the reaction?
2H20 (1)
H2SO4 (aq)
CaSO4 (aq)
Ca(OH)2 (aq)

Answer 1

Ca(OH)2 (aq)

Step-by-step explanation:

The base in the reaction would be Ca(OH)2 (aq).

A base is a substance which when dissolved in water, releases
`OH^-` as the only negative ion. A base is also a substance that donates electrons and accept protons in a reaction.

Ca(OH)2 in aqueous solution will ionize thus:

`Ca(OH)_2 (aq) --> Ca^(2+) (aq) + OH^- (aq)`

In a reaction involving an acid, the hydroxyl ion donates its electron and accept proton.

`H^+ + OH^- --> H_2O`