Molality And Molarity

Step 1: Understand the given values.
Volume of solution 1:

10%5C%2C%20%7Bml%7D

10%5C%2C%20%7BmM%7D%20%3D%200.01%5C%2C%20%7BM%7D

NaCl
Volume of solution 2:

990%5C%2C%20%7Bml%7D

10%5C%2C%20%7BmM%7D%20%3D%200.01%5C%2C%20%7BM%7D

NaCl
Total volume after mixing:

10%5C%2C%20%7Bml%7D%20%2B%20990%5C%2C%20%7Bml%7D%20%3D%201000%5C%2C%20%7Bml%7D%20%3D%201.0%5C%2C%20%7BL%7D

Step 2: Use the concept of molarity.
Since both solutions have the same concentration, there is no dilution effect due to concentration difference. Hence:

%7BFinal%20concentration%7D%20%3D%20%5Cfrac%7B(10%20%2B%20990)%20%5Ctimes%2010%5E%7B-3%7D%20%5C%2C%20%7Bmol%2FL%7D%7D%7B1.0%5C%2C%20%7BL%7D%7D%20%3D%200.01%5C%2C%20%7BM%7D

Step 3: Match the correct unit.

0.01%5C%2C%20%7BM%7D%20%3D%2010%5C%2C%20%7BmM%7D

, but since the option listed is in M, answer (3) 0.01 M is correct.

High-Yield Trend

Chapter Questions
1 MCQs

Official Solution

Molality And Molarity

High-Yield Trend

Chapter Questions 1 MCQs

Official Solution

Chapter Questions
1 MCQs