Question
Chemistry Question on Solutions
200mL of water is added to a 500mL of 0.2M solution. What is the molarity of this diluted solution?
A
0.5010M
B
0.2897M
C
0.7093M
D
0.1428M
Answer
0.1428M
Explanation
Solution
Thecorrect option is( D): 0.1428 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
5000.1×700=0.1428 mol
∴ Molarity of solution =0.1428 M.