Give an example of water soluble base.

Explanation

**Step-by-Step Solution:**

1. **Understanding Water Soluble Bases**: Water soluble bases are defined as substances that can dissolve in water and produce hydroxide ions (OH⁻) when dissolved. According to the Arrhenius definition, these substances are referred to as alkalis.

2. **Identifying Examples**: Common examples of water soluble bases (alkalis) include:
- **Sodium Hydroxide (NaOH)**: When dissolved in water, it dissociates into sodium ions (Na⁺) and hydroxide ions (OH⁻).
- **Potassium Hydroxide (KOH)**: Similar to sodium hydroxide, it dissolves in water to give potassium ions (K⁺) and hydroxide ions (OH⁻).
- **Ammonium Hydroxide (NH₄OH)**: Although it is a weak base, it is also soluble in water, producing ammonium ions (NH₄⁺) and hydroxide ions (OH⁻).
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