Nicotinic acid `(K_a = 1.4 xx 10^(-5))` is represented by the formula HNiC. Calculate its per cent dissociation in a solution which contains 0.10 mol of nicotinic acid per 2.0 L of solution.

Explanation

To calculate the percent dissociation of nicotinic acid (HNiC) in a solution, we can follow these steps:

### Step 1: Determine the initial concentration of nicotinic acid.
Given that there are 0.10 moles of nicotinic acid in a 2.0 L solution, we can calculate the initial concentration (C) as follows:

\[ C = \frac{\text{moles}}{\text{volume}} = \frac{0.10 \, \text{mol}}{2.0 \, \text{L}} = 0.05 \, \text{mol/L} \]
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