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Ganezh [65]
3 years ago
5

in a particular redox reaction, Cr is oxidized to CrO42- and Ag+ is reduced to Ag. Complete and balance the equation for this re

action in acidic solution.
Chemistry
2 answers:
Leviafan [203]3 years ago
8 0

Answer:

The complete and balance the equation for this reaction in acidic solution is given by:

Cr+4H_2O+6Ag^+\rightarrow CrO_4^{2-}+8H^++6Ag

Explanation:

Oxidation reaction of chromium to chromate in acidic medium:

Cr\rightarrow CrO_4^{2-}

Add 4 molecules of water on the left hand side to balance the oxygen:

Cr+4H_2O\rightarrow CrO_4^{2-}

Now balance hydrogen atoms by adding hydrogen ions on opposite to the side where water molecule are present .

Cr+4H_2O\rightarrow CrO_4^{2-}+8H^+6e^-....[1]

In last, to balance the charge on the both sides add electrons to sides where positive charge is more.

Reduction reaction of silver ions to silver in acidic medium:

Ag^++e^-\rightarrow Ag..[2]

By [1] + 6 × [2] , we will get the balance equation for this reaction in acidic solution:

Cr+4H_2O+6Ag^++6e^-\rightarrow CrO_4^{2-}+8H^+6e^-+6Ag

Cr+4H_2O+6Ag^+\rightarrow CrO_4^{2-}+8H^++6Ag

Gwar [14]3 years ago
7 0
Cro42ag What is the percent for the fraction nine twentieths? 1. 9% 2. 20% 3. 45% 4. 90%
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