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Tems11 [23]
3 years ago
5

Complete and balance the following oxidation-reduction reactions, which give the highest possible oxidation state for the

Chemistry
1 answer:
Leya [2.2K]3 years ago
3 0

Explanation :

Redox reaction or Oxidation-reduction reaction : It is defined as the reaction in which the oxidation and reduction reaction takes place simultaneously.

Oxidation reaction : It is defined as the reaction in which a substance looses its electrons. In this, oxidation state of an element increases. Or we can say that in oxidation, the loss of electrons takes place.

Reduction reaction : It is defined as the reaction in which a substance gains electrons. In this, oxidation state of an element decreases. Or we can say that in reduction, the gain of electrons takes place.

(a) The balanced chemical reaction will be:

K+H_2O\rightarrow KOH+H_2

The oxidation-reduction half reaction will be :

Oxidation : K\rightarrow K^++1e^-

Reduction : 2H^++2e^-\rightarrow H_2

In this reaction, the oxidation state of 'K' changes from (0) to (+1) that means 'K' lost 1 electron and it shows oxidation and the oxidation state of 'H' changes from (+1) to (0) that means 'H' gains 1 electron and it shows reduction.

In this reaction, potassium is the oxidizing atom that has the highest oxidation state is (+1).

(b) The balanced chemical reaction will be:

Ba+2HBr\rightarrow BaBr_2+H_2

The oxidation-reduction half reaction will be :

Oxidation : Ba\rightarrow Ba^{2+}+2e^-

Reduction : 2H^++2e^-\rightarrow H_2

In this reaction, the oxidation state of 'Ba' changes from (0) to (+2) that means 'Ba' lost 2 electrons and it shows oxidation and the oxidation state of 'H' changes from (+1) to (0) that means 'H' gains 1 electron and it shows reduction.

In this reaction, barium is the oxidizing atom that has the highest oxidation state is (+2).

(c) The balanced chemical reaction will be:

Sn+I_2\rightarrow SnI_2

The oxidation-reduction half reaction will be :

Oxidation : Sn\rightarrow Sn^{2+}+2e^-

Reduction : I_2+2e^-\rightarrow 2I^-

In this reaction, the oxidation state of 'Sn' changes from (0) to (+2) that means 'Sn' lost 2 electron and it shows oxidation and the oxidation state of 'I' changes from (0) to (-1) that means 'I' gains 1 electron and it shows reduction.

In this reaction, tin is the oxidizing atom that has the highest oxidation state is (+2).

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Alecsey [184]

a) When the reaction takes place a yellow precipitate will be formed.

b) The law of conservation of mass is true.

<u>Explanation:</u>

a) When a lead nitrate solution is mixed with a potassium chromate solution, a yellow precipitate containing lead forms according to the equation:

Pb(NO_3)_2 (aq) + K_2CrO_4 (aq) → 2 KNO_3 (aq) + PbCrO_4(s).

b) Law of conservation of mass for the given reaction is true.

From the given table we know the mass of reactants and its products.

Law of conservation of mass is a principle when a reaction takes place in a closed system, the mass of the products and reactants in the system doesn't change.

⇒The sum of the mass of the reactants = The sum of the mass of the products.

The sum of the reactants = 128.71+128.97.

                                          = 257.68 g.

The sum of the products = 154.10+103.58.

                                          = 257.68 g.

Thus law of conservation of mass is true for the above reaction.

3 0
3 years ago
How many bonding electrons are between the two oxygen atoms in hydrogen peroxide, h2o2h2o2?
Allushta [10]
There would be eighteen bonding electrons 
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3 years ago
I need help solving this for chemistry. Don’t know where to start:/
Juli2301 [7.4K]
1 electron has charge =1.602* 10⁻¹⁹ C
1 mole of electrons have 1.602* 10⁻¹⁹*6.02*10²³C = 9.64*10⁴ C/1mol

One ion Co²⁺   takes 2e⁻ to become Co⁰.
1 mol of Co²⁺  ions take 2 mole of e⁻ to become Co⁰, so
 0.30 mol Co²⁺  ions take mole of 0.60 mol e⁻ to become Co⁰

9.64*10⁴(C/1mol) *0.60 (mol)≈ 5.8 *10⁴ Coulombs.
Correct answer is C
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Radiant energy or electrical energy
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enot [183]

Answer:

true, true, true, and false

Explanation:

6 0
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