Oxiidation And Reduction

Question 0

Reduction

Answer 0

When an element gains an electron

Question 1

Oxidation

Answer 1

When an element loses an electron

Question 2

Oxidizing agent

Answer 2

A substance that causes the oxidation of another substance

Question 3

Reducing agent

Answer 3

A substance that causes the reduction of another substance

Question 4

Redox reactions

Answer 4

Oxidation + reduction must occur together

If 1 substance loses an electron the other substance has to accept these electrons

Question 5

Oxidising number

Answer 5

The charge an atom has or appears to have when electrons are distributed according to certain rules
Oxidation is an increase in oxidising number
Reduction is a decrease in oxidising number

Question 6

Ox. No. Of free element eg. K, Ca

Answer 6

0

Question 7

Sum of ox. No. Of all atoms in molecule eg. H20 , h2so4

Answer 7

0

Question 8

Sum of ox. No. In ions eg so4(2-) , Mno4(1-)

Answer 8

Equal to charge , so4(2-)

(X) +(y) = -2

Question 9

Hydrogen ox no.

Answer 9

+1

Question 10

Oxygen ox. No.

Answer 10

-2

Question 11

Balancing equations Order

Answer 11

Balance oxidise + reduced elements
Balance ‘O’
Balance ‘H’