Question

A chemist makes of magnesium fluoride working solution by adding distilled water to of a stock solution of magnesium fluoride in water. Calculate the concentration of the chemist's working solution. Round your answer to significant digits.

Answer 1

The question is incomplete, here is the complete question:

A chemist makes 600. mL of magnesium fluoride working solution by adding distilled water to 230. mL of a stock solution of 0.00154 mol/L magnesium fluoride in water. Calculate the concentration of the chemist's working solution. Round your answer to 3 significant digits.

Answer: The concentration of chemist's working solution is
`5.90* 10^(-4)M`

Step-by-step explanation:

To calculate the molarity of the diluted solution (chemist's working solution), we use the equation:

`M_1V_1=M_2V_2`

where,

`M_1\text{ and }V_1` are the molarity and volume of the stock magnesium fluoride solution

`M_2\text{ and }V_2` are the molarity and volume of chemist's magnesium fluoride solution

We are given:

`M_1=0.00154M\\V_1=230mL\\M_2=?M\\V_2=600mL`

Putting values in above equation, we get:

`0.00154* 230=M_2* 600\\\\M_2=(0.00154* 230)/(600)=5.90* 10^(-4)M`

Hence, the concentration of chemist's working solution is
`5.90* 10^(-4)M`