Answer: The volume of stock solution of calcium chloride required is 10 mL.
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:
[tex]C_1V_1=C_2V_2[/tex] ....(1)
where,
[tex]C_1\text{ and }V_1[/tex] are the concentration and volume of stock solution of calcium chloride
[tex]C_2\text{ and }V_2[/tex] are the concentration and volume of diluted solution of calcium chloride
Given values:
[tex]C_1=15.0M\\C_2=0.300M\\V_2=500mL[/tex]
Plugging values in equation 1:
[tex]15.0\times V_2=0.300\times 500\\\\V_2=10mL[/tex]
Hence, the volume of stock solution of calcium chloride required is 10 mL.