Question

A verapamil suspension is made from six tablets of 120 mg each. the recipe calls for each to be crushed and mixed with a small amount of water, the qs to a final volume of 60 mls. what is the final concentration?

Answer 1

Concentration of solution is defined as mass of solute in the given volume of solution.

The mass of 1 tablet is 120 mg thus, mass of same 6 tablets will be:

m=120×6=720 mg.

It is crushed and small amount of water is added to it to form a suspension. The final volume formed is 60 mL, concentration can be calculated using the following formula:

$C=\frac{m}{V}$

Here, C is concentration of solution, m is mass of tablets and V is volume of solution. On putting the values,

$C=\frac{720 mg}{60 mL}=12 mg/mL$

Therefore, final concentration will be 12 mg/mL.