Give one example of each of the following:
A metal hydroxide which is highly soluble in water.

Explanation

To answer the question "Give one example of a metal hydroxide which is highly soluble in water," we can follow these steps:

### Step-by-Step Solution:

1. **Understand what a metal hydroxide is**:
- Metal hydroxides are compounds that consist of metal cations and hydroxide ions (OH⁻). They are generally classified as bases.

2. **Identify the types of metal hydroxides**:
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