Question

Complete and balance each of the following equations. If no reaction occurs, enter NOREACTION.

Answer 1

Part A:

Given equation:

`KI_((aq))+BaS_((aq))\rightarrow`

The above equation is an example of a double replacement reaction. A double replacement (or double displacement) reaction is a reaction in which the positive and negative ions of two ionic compounds exchange.

Note: The oxidation number of:

K = +1

I = -1

Ba = +2

S = -2

So, the complete chemical equation including phases of the given reaction is:

`2KI_((aq))+BaS_((aq))\rightarrow BaI_(2(aq))+K_2S_((s))`

Part B:

Given equation:

`KCl_((aq))+CaS_((aq))\rightarrow`

Also, the equation is an example of a double replacement reaction.

Note: The oxidation number of:

K = +1

Cl = -1

Ca = +2

S = -2

The complete chemical equation including phases of the given reaction is:

`2KCl_((aq))+CaS_((aq))\rightarrow K_2S_((s))+CaCl_(2(aq))`