# A nurse wants to add water to 30 ounces of a 10% solution of benzalkonium chloride to dilute it to an 8% solution. How much water must she add?

##### 1 Answer

Sep 5, 2016

#### Answer:

7.5 oz

#### Explanation:

Using the standard dilution equation:

Where:

Rearranging for

We already have 30 oz, so just need to add 7.5 oz.

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