20 mL of 0.1 MH2SO4 solution is added to 30 mL of 0.2 M NH4OH solution. The pH of the resulatant mixture is : [pkb of NH4OH = 4.7].
Question ID - 51659 | SaraNextGen Top Answer 20 mL of 0.1 MH2SO4 solution is added to 30 mL of 0.2 M NH4OH solution. The pH of the resulatant mixture is : [pkb of NH4OH = 4.7].
20 mL of 0.1 MH2SO4 solution is added to 30 mL of 0.2 M NH4OH solution. The pH of the resulatant mixture is : [pkb of NH4OH = 4.7].
1 Answer
127 votes
Answer Key / Explanation : (9) -
20 ml 0.1 M H2SO4 
H+=4
30 ml 0.2 M NH4OH 
= 6
NH4OH + H+
N
+H2O
6 4 0 0
2 0 4 4
Solution is basic buffer
pOH+pKb+log
= 4.7 + log 2
= 4.7 + 0.3 = 5
pH = 14 − 5 = 9
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