Question

x ml of 0.1 M NaOH solution is diluted with distilled water to get 250 ml of 0.01 M solution. The value of x (in ml) is

• A. 12.5
• B. 25
• C. 37.5
• D. 50

Hint:

The dilution formula \(M_1V_1 = M_2V_2\) is fundamental for solving problems involving the dilution of solutions. As long as the units of volume (\(V_1\) and \(V_2\)) are the same (e.g., both in ml or both in L), you don't need to convert them.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
0.1M NaOH diluted to 250ml of 0.01M. Find initial volume.

Step 2: Key Formula (Alternate):
M₁V₁ = M₂V₂.

Step 3: Detailed Explanation:
0.1×x = 0.01×250 → 0.1x=2.5 → x=25ml.

Step 4: Final Answer:
x = 25 ml.