Chemistry, 20.07.2019 06:00 khambay

Which of the following chemical reactions is an oxidation-reduction reaction? fe2o3 + 3co yields 2fe + 3co2 mgso4 + 2kiyields k2so4 + mgi2 nano3 + kcl yields kno3 + nacl cu(no3)2 + 2hbryields cubr2 + 2hno3

Answers: 2

Show answers

Answers

Answer from: anna2894

Answer : The reaction that is an example of oxidation reduction reaction is "Fe2O3 + 3CO yields 2Fe + 3CO2 "

Explanation :

The oxidation reduction reaction is the one in which one of the elements undergo oxidation and the other undergoes reduction.

The oxidation number of the element that undergoes oxidation increases .

The oxidation number of the element that undergoes reduction decreases.

Let us find out which of these reactions show an increase and decrease in oxidation numbers.

$Fe_{2}O_{3}+3 CO\rightarrow 2Fe + 3CO2$

Let us find out the oxidation numbers of the elements involved in this reaction.

The standard oxidation state of O is -2

The overall charge on the compound Fe₂O₃ is 0.

Let us set up an equation to find oxidation number of Fe in Fe₂O₃.

2 ( oxidation number of Fe) + 3 ( Oxidation number of O) = Overall charge

2 ( oxidation number of Fe) + 3 ( -2) = 0

2 (oxidation number of Fe) - 6 = 0

oxidation number of Fe = 6/2 = +3

Oxidation number of Fe on reactant side is +3.

On product side Fe is present in its standard state. Therefore its oxidation number is 0.

Oxidation number of Fe on product side is 0.

Oxidation number of Fe changes from +3 to 0 which shows a decrease.

That means Fe undergoes reduction.

Let is find oxidation number of C on both the sides.

Oxidation number of C in CO is

oxidation number of C + (-2) = 0

oxidation number of C = +2

Oxidation number of C on reactant side is +2

Oxidation number of C in CO₂ is

Oxidation number of C + 2 x (-2) = 0

Oxidation number of C = +4

Oxidation number of C on product side is +4

Oxidation number for C changes from +2 to +4, which shows an increase.

Therefore C undergoes oxidation.

We can say that in the above reaction, one element ( Fe) undergoes reduction and the other (C) undergoes oxidation. This is an example of oxidation-reduction reaction.

Hence the correct option is "Fe2O3 + 3CO yields 2Fe + 3CO2 "

Answer from: Quest

the movement of aircraft through clouds can even cause lightning strikes. a single lightning event is a "flash", which is a complex, multi-stage explosively ejected.

explanation:

and the person below goggled it.

mark as brainliest

Answer from: Quest

A3.5 gap gps and your masters degree

Another question on Chemistry

Chemistry, 22.06.2019 00:00

Several kinds of bears are found on earth. most bears are brown or black, but one type of bear, the polar bear, is white. what process led to this difference in fur color? explain your answer.

Answers: 1

Answer

Chemistry, 22.06.2019 03:30

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

Answers: 1

Answer

Chemistry, 22.06.2019 10:30

Geothermal energy for industrial use is available almost anywhere. a.true b.false

Answers: 2

Answer

Chemistry, 22.06.2019 13:50

Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.

Answers: 3

Answer

You know the right answer?

Which of the following chemical reactions is an oxidation-reduction reaction? fe2o3 + 3co yields 2f...