Ionic EquilibriumHard
Question
Which solution will have pH closer to 1.0:
Options
A.100 mL of (M/10) HCI + 100 mL of (M/10) NaOH
B.55 mL of (M/10) HCI + 45 mL of (M/10) NaOH
C.10 mL of (M/10) HCI + 90 mL of (M/10) NaOH
D.75 mL of (M/5) HCI + 25 mL of (M/5) NaOH
Solution
Meq. of HCI = 75 × 
= 15 Meq. of NaOH = 25 × 
= 5
∴ Meq. of HCI left = 15 - 5 = 10 Now [HCI] left =
= 10-1
∴ pH = 1
= 15 Meq. of NaOH = 25 × = 5∴ Meq. of HCI left = 15 - 5 = 10 Now [HCI] left =
= 10-1∴ pH = 1
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