Question

An aqueous solution of potassium chloride is mixed with an aqueous solution of sodium nitrate.The complete ionic equation contains which of the following species (when balanced in standard form)?
a. Cl-(aq)
b.KNO3(aq)
c.3NO-3(aq)
d.2Na+(aq)
e.2K+(aq)

Answer 1

Answer: $Cl^-(aq)$ ions are present in the complete ionic equation

Explanation:

A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.

The balanced chemical reaction will be:

$KCl(aq)+NaNO_3(aq)\rightarrow NaCl(aq)+KNO_3(aq)$

The complete ionic equation can be written in terms of ions as:

$K^+(aq)+Cl^-(aq)+Na^+(aq)+NO_3^-(aq)\rightarrow Na^+(aq)+Cl^(aq)+K^+(aq)+NO_3^-(aq)$

Thus the complete ionic equation contains $Cl^-(aq)$ species.