Question

The normality of 26% (wt/vol) solution of ammonia (density =0.855) is approximately:

• A. \(1.5\)
• B. \(0.4\)
• C. \(15.3\)
• D. 4

Hint:

For acids/bases: Normality=Molarity× n where n is basicity or acidity.

Answer 1

The Correct Option is C

Step 1: 26% (w/v) means 26g of NH₃ per 100mL.
Step 2: Mass per litre: 260g/L
Step 3: Molar mass of NH₃=17. Molarity=(260)/(17)≈15.3M
Step 4: Ammonia is a monobasic base: Normality=Molarity=15.3