Redox Reactions And Electrochemistry Question 480
Question: When electric current is passed through acidified water, 112 mL of hydrogen gas at STP collected at the cathode in 965 seconds. The current passed in amperes is
Options:
A) 1.0
B) 0.5
C) 0.1
D) 2.0
Show Answer
Answer:
Correct Answer: A
Solution:
[a] $ 2{H^{+}}+2{e^{-}}\xrightarrow{{}}H_2 $ $ E_{H}(Eq.wt)=\frac{2}{2}=1 $ $ 1g=\frac{22400}{2}=11200,mL(STP) $ $ Totalchargepassed=\frac{96500\times 112}{11200}=965 $ $ Q=It=965 $ $ I=\frac{965}{965}=1amp. $
BETA
