chemistry

Fe2+(aq) + Cr2O7 2- (aq) →Fe3+(aq) + Cr3+(aq)
Balance the equation by using oxidation and reduction half reactions. What is smallest possible integer coeﬃcient of Cr3+ in the combined balanced equation?

1. 👍
2. 👎
3. 👁
1. Fe^+2 ==> Fe^+3 + e
Cr2O7^2- +6e + 14H^+ ==>2Cr^3+ + 7H2O

You finish. Multiply equation 1 by 6 and equation 2 by 1, then add the two.

1. 👍
2. 👎

1. 👍
2. 👎

Similar Questions

1. chemistry

Given these standard reduction potentials at 25oC: Cr3+ + e- -> Cr2+ (E1^o = -0.407V) Cr2+ + 2e- -> Cr(s) (E2^o = -0.913V) Determine the standard reduction potential at 25oC for the half-reaction equation: Cr3+ + 3e- -> Cr(s) This

2. SCIENCE

Balance the following redox reaction in acidic conditions Cr2O7 2- (aq) + HNO2 (aq) → Cr3+(aq) + NO3 - (aq)

3. Chemistry

Mno4 + fe2 ----> mn2 + fe3 Balance the redox reaction in acidic medium

Fe3+ + I1- ¨ Fe2+ + I2 1. Balance the equation 2. Which element is being oxidized? 3. Which element is the reducing agent?

1. chemistry

2. What is the reduction half-reaction for the following unbalanced redox equation? Cr2O72– + NH4+ Cr2O3 + N2 A.) Cr2O3 -> Cr2O7^2– *B.) Cr2O72– -> Cr2O3 C.) NH4+ -> N2 D.) N2 -> NH4+ 3. Which oxidation-reduction reactions

2. chemistry

Iron(II) can be oxidized by an acidic K2Cr2O7 solution according to the net ionic equation. Cr2O72− + 6 Fe2+ + 14 H+ 2 Cr3+ + 6 Fe3+ + 7 H2O If it takes 44.0 mL of 0.0250 M K2Cr2O7 to titrate 25.0 mL of a solution containing

3. Chemistry

The standard reduction potential for Cr3+(aq) is −0.74 V. The half-reaction for the reduction of Cr3+(aq) is the following. Cr3+(aq) + 3 e− → Cr(s) The standard reduction potential for Ni2+(aq) is −0.26 V. The

4. AP Chem

Redox Titrations: a. write 2-3 sentences describing and identifying the type of chemical reaction that occurs when Fe2+ reacts with potassium permanganate (KMnO4) and specifying the type of solution for the reaction to occur. b.

1. science

Calculate the emf of the cell CR|Cr3+(0.1M)||Fe2+(0.1M)Fe Given, E°Cr3+|CR = -0.75v E°Fe2+|Fe = -0.45v Cell reactn 2Cr(s)+3Fe2+(aq) -> 2Cr3+(aq)+3Fe(s)

2. URGENT AP CHEM HELP!!

Write 2-3 sentences describing and identifying the type of chemical reaction that occurs when Fe2+ reacts with potassium permanganate (KMnO4) and specifying the type of solution required for the reaction to occur. b. using

3. chemistry

Balance following oxidation reduction reactions using oxidation states method? a) Cl2(g) + Al(s) --> Al3+(aq) + Cl- b.) O2(g) + H2O(l) + Pb(s) --> Pb(OH)2(s) c) H+(aq) + MnO4-(aq) + Fe2+(aq) --> Mn2+(aq) + Fe3+(aq) + H2O(l)

4. chemistry

Fe2+ + MnO4- + Fe3+ + Mn2+ which of the elements is undergoing oxidation and which of the elements is the oxidizing agent?