Determine the volume in milliliters required to prepare each

Determine the volume, in milliliters, required to prepare each of the following diluted solutions.

A) 20.0 mL of a 2.05 M KNO3 solution using a 1.00 M KNO3 solution

Express your answer with the appropriate units

B) 15.0 mL of a 2.45 M H2SO4 solution using a 15.0 M H2SO4 solution

Express your answer with the appropriate units

C) 0.500 L of a 0.950 M NH4Cl solution using a 3.00 M NH4Cl solution

Express your answer with the appropriate units.

Solution

A)
use dilution formula
M1*V1 = M2*V2
1---> is for stock solution
2---> is for diluted solution

Given:
M1 = 1.00 M
M2 = 2.05 M
V2 = 20.0 mL

use:
M1*V1 = M2*V2
V1 = (M2 * V2) / M1
V1 = (2.05*20.0)/1.00
V1 = 41.0 mL
Answer: 41.0 mL

B)
use dilution formula
M1*V1 = M2*V2
1---> is for stock solution
2---> is for diluted solution

Given:
M1 = 15.0 M
M2 = 2.45 M
V2 = 15.0 mL

use:
M1*V1 = M2*V2
V1 = (M2 * V2) / M1
V1 = (2.45*15.0)/15
V1 = 2.45 mL
Answer: 2.45 mL

C)
use dilution formula
M1*V1 = M2*V2
1---> is for stock solution
2---> is for diluted solution

Given:
M1 = 3.00 M
M2 = 0.950 M
V2 = 500 mL

use:
M1*V1 = M2*V2
V1 = (M2 * V2) / M1
V1 = (0.950*500)/3.00
V1 = 158 mL
Answer: 158 mL