Question

What volume, in milliliters, of calcium chloride 15.0 M stock solution would you use to

make 500 mL of 0.300M of calcium chloride solution?
20
5
15
10

Answer 1

Answer: The volume of stock solution of calcium chloride required is 10 mL.

Step-by-step explanation:

A solution consists of solute and solvent. A solute is defined as the component that is present in a smaller proportion while the solvent is defined as the component that is present in a larger proportion.

To calculate the amount of solute needed, the formula used is:

`C_1V_1=C_2V_2` ....(1)

where,

`C_1\text{ and }V_1` are the concentration and volume of stock solution of calcium chloride

`C_2\text{ and }V_2` are the concentration and volume of diluted solution of calcium chloride

Given values:

`C_1=15.0M\\C_2=0.300M\\V_2=500mL`

Plugging values in equation 1:

`15.0* V_2=0.300* 500\\\\V_2=10mL`

Hence, the volume of stock solution of calcium chloride required is 10 mL.