Question

If 550 mL of a 3.50 M KCl solution are set aside and allowed to evaporate until the volume of the solution is 275 mL, what will the molarity of the solution be?

Answer 1

Answer:

Explanation:

Molarity = number of moles / volume

If 550 mL of a 3.50 M KCl solution are set aside and allowed to evaporate until the volume of the solution is 275 mL, which is half of 550 mL, the molarity of the solution with the same number of moles of KCl is 3.5 * 2 = 7.00 M

Answer 2

• C1=3.5M
• C2=?
• V1=550mL
• V2=275mL

$\\ \rm\rightarrowtail C1V1=C2V2$

$\\ \rm\rightarrowtail 3.5(550)=275C2$

$\\ \rm\rightarrowtail C2=3.5(2)$

$\\ \rm\rightarrowtail C2=7M$