Question

how does the ph of the solution on the right compare with that of the solution on the left?
the solution on the right is acidic relative to the solution on the left.
both of these solutions are equally basic.
the solution on the right is neutral relative to the solution on the left.
both of these solutions are equally acidic.
the solution on the right is basic relative to the solution on the left.

Explanation:

pH is related to the concentration of hydrogen - ions ($H^+$) and hydroxide - ions ($OH^-$). A higher concentration of $H^+$ makes a solution more acidic and a lower $H^+$ concentration (higher $OH^-$ concentration) makes a solution more basic. By observing the particle diagrams, if the right solution has fewer $H^+$ ions compared to the left solution, it is more basic.

Answer:

The solution on the right is basic relative to the solution on the left.