Question

Calculating molarity using solute moles A chemist prepares a solution of sodium chloride (NaCl) by measuring out 6.89 mol of sodium chloride into a 200 ml volumetric flask and filling the the mark with water. Calculate the concentration in mol/L of the chemist's sodium chloride solution. Round your answer to 3 significant digits. X 5 ? Explanation Check

Answer 1

Answer: Concentration of the chemist's sodium chloride solution is 34.4 mol/L.

Step-by-step explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

`Molarity=(n* 1000)/(V_s)`

where,

n= moles of solute

`V_s` = volume of solution in ml

Given : moles of
`NaCl` = 6.89

volume of solution = 200 ml

Putting in the values we get:

`Molarity=(6.89* 1000)/(200)=34.4mol/L`

Thus the concentration of the chemist's sodium chloride solution is 34.4 mol/L.