A patient needs to be given exactly 500 ml of a 5.0% (w/v) intravenous glucose solution. the stock solution is 35% (w/v). how many milliliters of the stock solution are needed to prepare the fluid for the iv bag?

Question

Will Arnold

Chemistry

3 July, 20:00

A patient needs to be given exactly 500 ml of a 5.0% (w/v) intravenous glucose solution. the stock solution is 35% (w/v). how many milliliters of the stock solution are needed to prepare the fluid for the iv bag?

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Tomas Morrow · Answer 1

In this question, the patient needs to be given exactly 500 ml of a 5.0%. The content of the glucose should be:

weight = volume * density * concentration

500ml * 1mg/ml * 5% = 25mg.

The stock solution is 35%, then the amount needed in ml would be:

weight = volume * density * concentration

25mg = volume * 1mg/ml * 35%

volume = 25/35% = 500/7 = 71.43ml