1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
MAVERICK [17]
3 years ago
11

Balance the following redox equation in acidic solution using the smallest integers possible and select the correct coefficient

for the H+(aq) ion.Cr2O72–(aq) + Sn2+(aq) → Cr3+(aq) + Sn4+(aq)(A) 1 (no coefficient written)(B) 2(C) 3(D) 4(E) More than 4
Chemistry
1 answer:
Evgen [1.6K]3 years ago
4 0

Answer:

The balanced redox is:

14 H⁺ + Cr₂O₇²⁻ + 3Sn²⁺ → 3Sn4⁺  + 2Cr³⁺  + 7H₂O

So the coefficient for the H⁺ is greater than 4 (option E)

Explanation:

This is the redox reaction:

Cr₂O₇²⁻ (aq) + Sn²⁺ (aq)  →  Cr³⁺ (aq) + Sn⁴⁺(aq)

First of all, we must determine the half reactions:

In dycromate, Cr acts with +6 in the oxidation state → Cr cation has +3 in product side - Oxidation state, has decreased so this is the reduction.

In reactant side Sn cation acts with +2 → In product side Sn acts with +4

The oxidation state has increased, so this is the oxidation.

Cr₂O₇²⁻  → Cr³⁺

We have to add 2, to Cr in reactant side, and as we are in adicid medium we add water in the opposite side of oxygen. The same amount of oxgen, that we have.

Cr₂O₇²⁻  → 2Cr³⁺ + 7H₂O

Finally, as we have 14 H in product side, we must add 14 H⁺ to the reactant side. Cr+⁶ in dycromate to change to Cr³⁺, gained 3 e⁻, but we have 2 Cr, so in total the Cr gained 6e⁻. The balanced half reaction is:

14 H⁺ + Cr₂O₇²⁻ + 6e⁻ → 2Cr³⁺  + 7H₂O

Sn²⁺ to change the oxidation state, to +4 had to release electrons:

Sn²⁺ →  Sn4⁺  + 2e⁻

The electrons are unbalanced, so we must to multiply the half reactions:

(14 H⁺ + Cr₂O₇²⁻ + 6e⁻ → 2Cr³⁺  + 7H₂O) x1

(Sn²⁺ →  Sn4⁺  + 2e⁻ ) x3

And we sum both:

14 H⁺ + Cr₂O₇²⁻ + 6e⁻ + 3Sn²⁺ → 3Sn4⁺  + 6e⁻  + 2Cr³⁺  + 7H₂O

You might be interested in
How many grams of N2 are in 44.8L at STP?
lutik1710 [3]

Answer: 10 i think

Explanation:

3 0
3 years ago
Do oxygen atoms become more stable or less stable when oxygen forms compounds? Explain
4vir4ik [10]
They become more stable because they achieve a full outer shell of valence electrons with the magic number of 8.

5 0
2 years ago
Read 2 more answers
Alguien sabe el nombre del compuesto etilisopropilacetileno?​
Paladinen [302]
Noooooooooooooooooooooo
3 0
3 years ago
Calculate the amount of grams of water that was used when 5525J of energy was used to boil this amount of water.
djverab [1.8K]

Answer:

2.445 g

Explanation:

Step 1: Given and required data

  • Energy in the form of heat required to boil the water (Q): 5525 J
  • Latent heat of vaporization of water (∆H°vap): 2260 J/g
  • Mass of water (m): ?

Step 2: Calculate the mass of water

We will use the following expression.

Q = ∆H°vap × m

m = Q / ∆H°vap

m = 5525 J / (2260 J/g)

m = 2.445 g

4 0
2 years ago
The radioactive isotope I-131 is used in
Fudgin [204]
The answer is D, medical diagnosis
3 0
2 years ago
Other questions:
  • A biology student wants to conduct a study of how the amount of food affects weight gain for mice. He sets up four cages with a
    12·1 answer
  • What is the best course of action if you are out driving during a thunderstorm?
    6·1 answer
  • Do you believe the research subjects in the original study were appropriate for this experiment
    13·2 answers
  • if you were trying to heat soup would you want to use a good thermal conductor or good thermal insulator? explain your answer
    6·2 answers
  • Rank the following compounds in order of reactivity toward nitration with HNO3:_______. thiophene, benzene, 3-methylthiophene, a
    9·1 answer
  • In the test for Cl1- and SO4 2- , explain why the addition of acid will dissolve or decompose other silver salts and barium salt
    10·1 answer
  • Calculate the electrical energy per gram of anode material for the following reaction at 298 K:
    8·1 answer
  • Which of the following describes the products of a chemical reaction?
    8·1 answer
  • Nahco3+hc2h3o2=nac2h3o2+h2co3
    13·2 answers
  • Which of these would NOT be considered “maintaining homeostasis”?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!