200 mL of water is added to a 500 mL of 0.2 M solution. What is the molarity of this diluted solution?

Question

200 mL of water is added to a 500 mL of 0.2 M solution. What is the molarity of this diluted solution? (A) 0.5010 M (B) 0.2897 M (C) 0.7093 M (D) 0.1428 M

Tardigrade Admin · Accepted Answer

0.2 molar solution, ie, 1000 mL solution contains 0.2 mol solute.

∴

500 mL solution contains 0.1 mol solute thus, 700 mL solution contain

\frac{0.1}{500} \times 700 = 0.14 m o l

∴

Molarity of solution = 0.14 M

Q. $200 m L$ of water is added to a $500 m L$ of $0.2 M$ solution. What is the molarity of this diluted solution?

$0.5010 M$

$0.2897 M$

$0.7093 M$

$0.1428 M$

$0.4005 M$

0.2 molar solution, ie, 1000 mL solution contains 0.2 mol solute.
$∴$ 500 mL solution contains 0.1 mol solute thus, 700 mL solution contain
$\frac{0.1}{500} \times 700 = 0.14 m o l$
$∴$ Molarity of solution = 0.14 M

Q. 200mL of water is added to a 500mL of 0.2M solution. What is the molarity of this diluted solution?

0.5010M

0.2897M

0.7093M

0.1428M

0.4005M

0.2 molar solution, ie, 1000 mL solution contains 0.2 mol solute. ∴ 500 mL solution contains 0.1 mol solute thus, 700 mL solution contain 5000.1​×700=0.14mol ∴ Molarity of solution = 0.14 M