Reactions of elements( Metals and Non-Metals) with O2

Question 1

Give the general word equation for when a metal reacts with oxygen.

Answer 1

Metal + Oxygen -> Metal Oxide

Question 2

Give the general word equation for when a metal oxide reacts with water.

Answer 2

Metal oxide + water -> Metal Hydroxide

Question 3

Give the general word equation for when a non-metal reacts with oxygen.

Answer 3

Non-metal + oxygen -> Non-Metal oxide

Question 4

Give the general word equation for when a non-metal oxide reacts with water

Answer 4

Non-metal oxide + water -> non-metal hydroxide

Question 5

What name is given to a reaction that releases energy?

Answer 5

Exothermic reactions.

Question 6

Which two of the general general word equations are exothermic reactions and why they are exothermic?

Answer 6

1. metal + oxide -> metal oxide
2. Non-metal + oxide -> non-metal oxide
   Reason for being exothermic:
   Both reactions give off energy in the form of heat and light. AKA: combustion

Question 7

what is combustion?

Answer 7

Combustion is when a non-metal or metal burn in O2 in which gives off energy in the form of heat and light.

Question 8

Give the apperance of these elements:

1. Carbon [NM]
2. Iron [M]
3. Magnesium [M]
4. Sulfur [NM]

Answer 8

Carbon- black powder
Iron - Greyish, silver lustre
Magnesium- Greyish Ribbon
Sulfur- yellow power

Question 9

1. How strong is the reaction when Carbon reacts with O2

2. What colour is the flame it burns with

Answer 9

1. Its a feeble reaction

2. A Red glow

Question 10

1. How strong is the reaction when Iron reacts with 02

2. What colour is the flame it burns with

Answer 10

1. Its a fairly rapid reaction

2. Bright yellow

Question 11

1. How strong is the reaction when Magnesium reacts with O2

2. What colour is the flame it burns with

Answer 11

1. Its a vigorous reaction

2. Bright blinding white light .

Question 12

1. How strong is the reaction when Sulfur reacts with O2

2. What colour flame does it burn with.

Answer 12

1. Its a vigorous reaction

2. A bluish-purple

Question 13

Reaction Equation for Carbon and oxygen

Answer 13

C + O2 -> CO2

Question 14

Reaction Equation for Iron and oxygen

Answer 14

2Fe + O2 -> 2FeO

Question 15

Reaction Equation for Magnesium and oxygen

Answer 15

2Mg + O2 -> 2MgO

Question 16

Reaction Equation for Sulfur and oxygen

Answer 16

S + O2 -> SO2

Question 17

Carbon with O2

1. Nature of the product
2. Name of product

Answer 17

1. colourless, odourless gas

2. Carbon dioxide

Question 18

Iron with 02

1. Nature of the product
2. Name of product

Answer 18

1. Grey solid mass

2. Iron (II) oxide

Question 19

Magnesium with 02

1. Nature of the product
2. Name of product

Answer 19

1. White solid Powder

2. Magnesium oxide

Question 20

Sulfur with O2

1. Nature of the product
2. Name of product

Answer 20

1. Misty, chocking gas

2. Sulfur dioxide