Question

Calcium hydroxide is slightly soluble in water. About 1 gram will dissolve in 1 liter. What are the spectator ions in the reaction of such a dilute solution of calcium hydroxide with hydrochloric acid

Answer 1

2H+(aq) + 2OH-(aq) ---> 2H2O(l)

Cl-(aq) , Ca2+(aq) are the spectator ions.

Step-by-step explanation:

In order to make the ionic equation we need to separate the components which are stable substances from the aqueous components.

Molecular equation:

2HCl (aq) + Ca(OH)2(aq) ---> CaCl2 (aq) + 2H2O(l)

ionic equation:

2H+(aq) + 2Cl-(aq) + Ca2+(aq) + 2OH-(aq) ---> Ca2+(aq) + 2Cl- (aq) + 2H2O(l)

In order to make the final equation, it has to be canceled all the species which are present in moth sites of the equation. So, Cl-(aq) , Ca2+(aq) are the spectator ions.

final equation: 2H+(aq) + 2OH-(aq) ---> 2H2O(l)