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Question

A volume of $$100\ ml$$ of a buffer of $$1 M \ NH_{3}$$ and $$ 1M \ NH_{4}^{+}$$ is placed in two half-cells connected by a salt bridge. A current of $$1.5\ A$$ is passed through the cell for $$20$$ minutes. If only the electrolysis of water takes place and the electrode reactions are;

Right Electrode: $$ 2H_{2}O +O_{2}+4e \rightarrow 4 OH^{-}$$
Left Electrode: $$ 2H_{2}O \rightarrow 4H^{+}+O_{2}+4e,$$

then, the $$pH $$ of:

A
left electrode will increase
B
both electrodes will decrease
C
right electrode will increase
D
both electrodes will increase
Solution
Verified by Toppr

Correct option is A. right electrode will increase

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Similar Questions
Q1
A volume of $$100\ ml$$ of a buffer of $$1 M \ NH_{3}$$ and $$ 1M \ NH_{4}^{+}$$ is placed in two half-cells connected by a salt bridge. A current of $$1.5\ A$$ is passed through the cell for $$20$$ minutes. If only the electrolysis of water takes place and the electrode reactions are;

Right Electrode: $$ 2H_{2}O +O_{2}+4e \rightarrow 4 OH^{-}$$
Left Electrode: $$ 2H_{2}O \rightarrow 4H^{+}+O_{2}+4e,$$

then, the $$pH $$ of:
View Solution
Q2
100mL of a buffer of 1 M NH3(aq) and 1M NH4(aq) are placed in two voltaic cells separately. A current of 1.5A is passed through both cells for 20min. If the electrolysis of water only takes place :
2H2O+O2+4e,4OH(RHS)
2H2OH+O2+4e(LHS), then:

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Q3
100ml of a buffer of 1MNH3(aq)and1MNH4+(aq) are placed in two half cells separately. A current of 1.5amp is passed through both half cells for 20min, if electrolysis of only water take place. The pH of :
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Q4
What will be the electrode potential for the given half cell reaction at pH= 5?
2H2OO2+4H++4e;E=1.23 V
(R= 8.314 Jmol1K1; temp = 298 K; oxygen under std. atm. Pressure of 1 bar.)
View Solution
Q5
For a cell reaction
2H2(g) + O2(g) → 2H2O(l)
ΔS°298 = –0.32 kJ/K
What is the value of ΔfH°(298) (H2O, l)?

[Given: standard electrode potential of the following half cell reaction is 1.23 V, O2(g) + 4H+ + 4e → 2H2O(l)]

दी गयी सेल अभिक्रिया
2H2(g) + O2(g) → 2H2O(l) के लिए
ΔS°298 = –0.32 kJ/K
ΔfH°(298) (H2O, l) का मान क्या है?

[दिया गया है : अर्ध सेल अभिक्रिया O2(g) + 4H+ + 4e → 2H2O(l) का मानक इलेक्ट्रॉड विभव 1.23 V है]
View Solution