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A pharmacist needs to prepare 500 mL of a 10 w ... - SS1 Chemistry Solutions and Concentration Question

A pharmacist needs to prepare 500 mL of a 10% (w/v) solution of glucose. How much glucose should be dissolved in water to make the desired solution?

A

0.5 g

 

B

10 g

 

C

50 g

 

D

100 g

correct option: a

0.5 g

In a w/v (weight/volume) solution, the weight of the solute (glucose) is expressed in grams, and the volume of the solution is expressed in millilitres (mL).

 

Given:

Volume of the solution (V2) = 500 mL

Concentration of the solution (C2) = 10% (w/v)

Weight of the solute (glucose) = ?

 

To find the weight of glucose, we need to convert the percentage to a decimal. 10% = 10/100 = 0.1.

 

Weight of glucose = (Concentration × Volume) / 100

Weight of glucose = (0.1 × 500 mL) / 100

Weight of glucose = 0.5 g

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