Certified Wildlife Rehabilitator Practice Test 2025 - Free Wildlife Rehabilitation Practice Questions and Study Guide

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What is the ratio to prepare 100ml of 5% dextrose using 50% dextrose and sterile water?

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To determine the ratio needed to prepare 100ml of a 5% dextrose solution using a 50% dextrose solution and sterile water, we start by calculating how much dextrose is needed in the final solution.

A 5% dextrose solution means there are 5 grams of dextrose in 100ml. When using a 50% dextrose solution, which contains 50 grams of dextrose in 100ml, we need to find out how much of this concentrated solution will provide 5 grams of dextrose.

Using the formula:

\[ \text{Volume of 50% solution} = \frac{\text{Desired grams of dextrose}}{\text{Concentration of the solution}} \]

Substituting in the values:

\[ \text{Volume of 50% solution} = \frac{5\, \text{grams}}{50\, \text{grams/100ml}} = 10\, \text{ml} \]

This means we will use 10ml of the 50% dextrose solution. To make up a total volume of 100ml, we subtract the volume of the 50% solution from the final volume

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