Practice 2 Balance red-ox Reaction In an acidic solution. CHSCHO Cr2 072-> C6H5COOH Cr3+ (Ox)CBHSCHO H2O-CBH5COOH 2 H+2e Red)Cr2O72-+ 14 H++ 6e>2 Cr3++ 7 H2O Combined: 3 X(OX)+(Red 3CBH5CHO +3 H2O+ cr2 072+ 14H -3CcH-COOH +6 H++ 2 Cr3++7H,O Simplify: 3 C6H5CHO 8 H*+ Cr2o ->3 C._COOH 2 Cr3++4H.O 10Practice 2: Balance Red-ox Reaction z In an acidic solution: In an acidic solution: C 6 H 5CHO + Cr 2 O 7 2- → C 6 H 5COOH + Cr3+ (Ox) C 6 H 5CHO + H 2O → C 6 H 5COOH + 2 H + + 2 e- (Red) Cr 2 O 7 2- + 14 H + + 6 e- → 2 Cr3+ (Red) Cr 2 O 7 + 14 H + 6 e → 2 Cr + 7H 2 O Combined: 3 x (Ox) + (Red) : 3 C 6 H 5CHO + 3 H 2 O + Cr 2 O 7 2- + 14 H + → 3 C 6 H 5COOH + 6 H + + 2 Cr3+ + 7 H 2 O Simplify： 3 C 6 H 5CHO + 8 H + + Cr 2 O 7 2- 3 C H COOH 2 C 3 4 H O 10 → 3 C 6 H 5COOH + 2 C r 3 + + 4 H 2 O