10. How many moles of K2Cr2O7 can be reduced by 1 mole of Sn2+ ?
(1) 1/3
(2) 1/6
(3) 2/3
(4) 1
Answers
Answered by
0
The balanced chemical reactions (ionic reactions)for reduction of
2
Cr
2
O
7
by Sn
2+
are:
Cr
2
O
7
2−
+14H
+
+6e
−
→2Cr
3+
+7H
2
O
(Sn
2+
→Sn
4+
+2e
−
)×3
Balanced Net reaction : 3Sn
2+
+Cr
2
O
7
2−
+14H
+
→3Sn
4+
+2Cr
3+
+7H
2
O
Thus according to the balanced reaction : 1 mole of Cr
2
O
7
2−
will be reduced by 3 moles of Sn
2+
Thus 1 mole of Sn
2+
will reduce =
3
1
moles ofCr
2
O
7
2−
Hence, the correct option is A
Similar questions