Identify the components in each beaker and determine which solution has the greatest buffer capacity.

Here's the breakdown for question 19.4:

First, let's identify the components in each beaker:

• Red spheres represent the conjugate base ($\text{A}^-$).
• Blue spheres with a small red sphere attached represent the weak acid ($\text{HA}$).

Let's count the number of $\text{HA}$ and $\text{A}^-$ particles in each solution:

• Solution A: 4 $\text{HA}$, 4 $\text{A}^-$ (Total = 8 particles)
• Solution B: 2 $\text{HA}$, 6 $\text{A}^-$ (Total = 8 particles)
• Solution C: 6 $\text{HA}$, 2 $\text{A}^-$ (Total = 8 particles)
• Solution D: 2 $\text{HA}$, 2 $\text{A}^-$ (Total = 4 particles)

a) Which solution has the greatest buffer capacity?

Step 1: Determine buffer capacity based on