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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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7 0
3 years ago
I'll mark brainliest.....
Ilya [14]
P = 203
V = 10
n = ?
R = 8.31
T = 298
PV = nRT \\ 203(10) = n(8.31)(298) \\ 2030 = 2476.38n \\ n =  \frac{2030}{2476.38} = 0.819 mol
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3 years ago
Which state of matter has a definite volume, but does not have a definite shape?
evablogger [386]

Answer:

Liquid, definite volume but no definite shape.

Explanation:

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3 years ago
What is e cell (in units of volts) for a galvanic cell constructed from barium and manganese electrodes?
gulaghasi [49]

Main Answer: The standard electrode potential of galvanic cell constructed from barium and manganese electrode is 4.097.

Explanation:

When the galvanic cell constructed between Manganese and Barium, the half reactions will be as follows:

Mn2+(aq) + 2e-⟶ Mn(s)                                             E1 = −1.185

Ba2+(aq) + 2e-⟶ Ba(s)                                                 E2 = −2.912

By considering the above two reactions, the standard electrode potential can be calculated.

The galvanic cell standard electrode potential is given by E1 + E2 = 1.185 + 2.912 = 4.097 volts

What is standard electrode potential?

Standard electrode potential is defined as the measure of reducing power of any compound or element. Its units are volts.

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1 year ago
What dos the line of red semicircles maen on the weather map
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The red semicircle shown in the weather chart represents warm front.

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3 years ago
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