Question

3. How many milliliters of a 10% (m/v) glucose solution are required to supply 100 g of glucose?

Answer 1

#3.

% m/v solution = (mass of solute/volume of solution)×100 .

10% m/v solution of glucose means , 10g glucose is present in 100mL of solution.

Then for 100g glucose, solution required is ;

(100mL solution/10g glucose) × 100g glucose = 1000mL of the solution is required.

Thus we require 1000mL of glucose solution for 100g of glucose.

#4. 0.5% m/v means , 0.5g of KCl is present in 100mL of solution.

For 20mL solution , we need KCl ;

(0.5g KCl/100mL solution) × 20mL solution = 0.1g of KCl is required.