`Cu^(2+)//Cu` तथा `Cu^(2+)//Cu^(+)` के लिए मानक अपचयन विभव के मान क्रमश: 0.337 V तथा 0.153 V हैं | अर्द्ध-सेल, `Cu^(+)//Cu` के लिए मानक इलेक्ट्रोड विभव का मान होगा

Options

A. 0.184 V
B. 0.827 V
C. 0.521 V
D. 0.490 V

Answer

C

Explanation

प्रश्नानुसार-
`{:(because" "E^(@)(Cu^(2+)//Cu^(+)) = 0.153 V),(therefore" "E^(@)(Cu^(+)//Cu^(2+))=-0.153 V),((i)" "Cu^(2+) + 2e^(-) rarr Cu"," E^(@) = + 0.337 V),(therefore" "Delta G_(1)^(@) = -2 xx 0.337 xx F),(" "=-0.674 F),((ii)" "Cu^(+)rarr Cu^(2+) + e^(-)"," E^(@) = - 0.153 V","),(therefore" "Delta G_(2)^(@)=-1xx(-0.152)F),(ulbar(Cu^(+)+e^(-)rarr Cu, E^(@) = ?therefore Delta G_(3)^(@)=-1xx E^(@) xx F)):}`
अथवा `{:(-E^(@)F = Delta G_(1)^(@)+DeltaG_(2)^(@)),(" "=-0.674 F + 0.153 F):}`
अथवा `{:(" "-E^(@)F = -0.521 F),(therefore" "E^(@) = 0.521 V):}`