Electrochemistry Part 2

Section: Chemistry
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Question : 2 of 117
 
Marks: +1, -0
A volume of xmL of 5 M NaHCO 3 solution was mixed with 10 mL of 2MH2CO3 solution to make an electrolytic buffer.
If the same buffer was used in the following electrochemical cell to record a cell potential of 235.3 mV , then the value of x= ____ mL (nearest integer).
Sn(s)|Sn(OH)6‌2−(0.5M)|HSnO2−(0.05M)|OH−|Bi2O3(s)∣Bi(s)
Consider up to one place of decimal for intermediate calculations
[
‌ Given: ‌ESn(OH)62−∣HSnO2−o=−0.9V
‌EoBi2O3∣Bi=−0.44V
‌pKa(H2CO3)=6.11
‌‌
2.303RT
F
=0.059V
‌‌ Antilog ‌(1.29)=19.5
]
[28 Jan 2026 Shift 2]
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