Question

what is the concentration of the NaCl solution that results when 0.15 0 L of 0.556-M solution is allowed to evaporate until the volume is reduced to 0.105 L?

Answer 1

Answer: The concentration of evaporated solution is 0.794 M

Explanation:

To calculate the molarity of the diluted 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 evaporated solution

$M_2\text{ and }V_2$ are the molarity and volume of initial solution

We are given:

$M_1=?M\\V_1=0.105L\\M_2=0.556M\\V_2=0.15L$

Putting values in above equation, we get:

$M_1\times 0.105=0.556\times 0.15\\\\M_1=0.794M$

Hence, the concentration of evaporated solution is 0.794 M