How is the concentration of hydroxide ions` (OH^(–))` affected when excess base is dissolved in a solution of sodium hydroxide?

Explanation

To determine how the concentration of hydroxide ions (OH⁻) is affected when excess base is dissolved in a solution of sodium hydroxide, we can follow these steps:

### Step 1: Understand the Composition of Sodium Hydroxide
Sodium hydroxide (NaOH) is a strong base that dissociates completely in water to produce sodium ions (Na⁺) and hydroxide ions (OH⁻). The dissociation can be represented as:
\[ \text{NaOH} \rightarrow \text{Na}^+ + \text{OH}^- \]

### Step 2: Adding Excess Base
When we add excess base (for example, another strong base like potassium hydroxide, KOH) to the sodium hydroxide solution, we need to consider what happens to the hydroxide ions in the solution.
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