Final answer:
The buffer capacity of a solution depends on the concentrations of the weak acid and its conjugate base. If the concentrations are increased, the buffer capacity will also increase.
Step-by-step explanation:
The buffer capacity of a solution is a measure of its ability to resist changes in pH when small amounts of acid or base are added. The buffer capacity depends on the concentrations of the weak acid and its conjugate base in the solution. In this case, if the concentrations of a weak acid and its conjugate base are increased from 0.1 M and 0.05 M to 0.2 M and 0.1 M, respectively, the solution's buffer capacity will increase.