When potassium is mixed with water, it reacts violently to produce potassium hydroxide and hydrogen gas. The chemical equation for the reaction is:

```
2K(s) + 2H2O(l) → 2KOH(aq) + H2(g)
```

The reaction is exothermic, meaning that it releases heat. The hydrogen gas produced is flammable and can ignite, causing a fire. The potassium hydroxide is a strong base and can cause skin burns.

It is important to never mix potassium with water, as the reaction can be very dangerous. If you accidentally come into contact with potassium metal, do not touch it. Instead, call 911 or your local emergency number immediately.

Here are some safety tips to follow when working with potassium:

* Always wear protective clothing, such as gloves, goggles, and a lab coat.
* Store potassium in a cool, dry place.
* Do not mix potassium with water or other chemicals.
* If you accidentally come into contact with potassium metal, flush the affected area with water for at least 15 minutes and call 911 or your local emergency number.
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