Question

Depending upon the tip of the of a dropper pipet, there are approximately 20 drops per milliliter of water. The experimental procedure, parts a and b indicates the addition of 5-10 drops of each solution to the test tube. Calculate the volume range in milliliters for a solution.

Answer 1

Answer : Volume range in milliliters for a solution is 0.25 ml to 0.5 ml.

Solution : Given, 1 ml = 20 drops

There are 20 drops present in = 1 ml of water

In 1 drop =
`\frac{1 ml \text{ of water}}{20\text{ drops}}`

And in 5 drops =
`\frac{1 ml \text{ of water}}{20\text{ drops}}* 5 \text{ drops}`

= 0.25 ml

For range calculation, 0.25 ml is multiplied by the 2, we get

= 0.25 × 2

= 0.5 ml

Hence, the volume range is 0.25 ml to 0.5 ml.