Calculate the molarity of an aqueous solution of ammonia of pH 9.3. `K_b` for ammonia is `1.8 xx 10^(-5)` and `K_w = 1 xx 10^(-14)`

Explanation

To calculate the molarity of an aqueous solution of ammonia with a given pH of 9.3, we can follow these steps:

### Step 1: Calculate the concentration of H⁺ ions
Given the pH of the solution is 9.3, we can calculate the concentration of hydrogen ions \([H^+]\) using the formula:
\[ [H^+] = 10^{-\text{pH}} = 10^{-9.3} \]
Calculating this gives:
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