3. An aqueous solution contains 0.01M RNH₂ ( Kb = 2x10-6 ) & 10-4 M NaOH. The concentration of OH- is nearly ?
14Dec - 2022
3. An aqueous solution contains 0.01M RNH₂ ( Kb = 2x10-6 ) & 10-4 M NaOH. The concentration of OH- is nearly ?A. 2.414×10-4 B. 2×10-4 C. 1.414×10-5D. 10-4 E. 1.414×10-4 SOLUTION[OH−] ⟹ RNH2 is weak base, it reacts with H2OpKb = −log10 (2×10-6) = 6 − log2pH = 14 − 21 (pKb − logC)pH = 14 − 21 (6-log2 − log10−2)pH = 14 − 3...
