Oxides

Question 1

What is an oxide

Answer 1

Compound of oxygen and another element

Question 2

How are oxide made

Answer 2

Burning element in air

2Mg + o2 —> 2mgo

Question 3

What are the 4 type of oxides

Answer 3

1. Basic oxide
2. Acidic oxides
3. Amphoeteric oxide
4. Neutral oxides

Question 4

What are acidic oxides

Answer 4

Non-metallic oxide which reacts with water to form an acid

React w alkali to form salt and water
I.e co2 and NAOH—> na2co3 + h2o

I. E co2 + h20 —> h2co3

Question 5

What are some acidic oxides

Answer 5

Sulfur dioxide ( sulfurous acid h2so3)
Sulfur trioxide (sulfuric acid h2so4) 
Nitrogen dioxide (no2 hno3 nitric acid )

Question 6

Acidic oxides damage

Answer 6

Acidic rain cause harm to buildings w limestone and marble

Question 7

Acidic oxides react w

Answer 7

Alkalis to produce salt and water only

Question 8

What is a basic oxide

Answer 8

Metallic oxide which reacts w an acid to produce salt and water only

Question 9

What can basic oxides be used for

Answer 9

Neutralise acids

Quicklime Cao and slaked like ca(oh)2 raise ph of soil b4 it’s too acidic

Question 10

Basic oxide soluble in water.

Answer 10

Alkaline solution

NAOH + h2o —> 2naoh

Question 11

Example of basic oxides

Answer 11

Mgo
Cao
Bao

Question 12

Basie vs alkali

Answer 12

Alkali is special base as soluble in water
Dissolved in water to give hydroxide ions

Water insoluble metal oxide react w an acid is base not alkali

Soluble metal oxides dissolve in water to give soluble metal hydroxides

Question 13

Wate insoluble base

Answer 13

1. Oxide
   All metal oxides are warer insoluble

I.w mgo and cuo

2. Hydroxides

All metal hydroxides are water insoluble

I.e cu(oh) 2 fe(oh)2

Question 14

Water soluble base alkali

Answer 14

1. Oxide
   Na2o and k2o and Cao (sparingly soluble )
2. Hydroxides
   NAOH, Koh, ca(oh)2 (sparingly soluble )

Question 15

What are amphoeteric oxides

Answer 15

Metallic oxide show both acidic and basic properties

Amphoeteric oxides react w both acid and alkalis to produce salts and water only

Question 16

Example of amphoeteric oxide d

Answer 16

Aluminium oxide (al2o3)
Lead (II) oxide (pbo )
Lead (IV) oxide (pbo2)
Tin oxide (sno)

Question 17

What are neutral oxides

Answer 17

Non metallic oxide that is neither acidic nor basic

Neither react with acid or alkalis

Insoluble in water

Question 18

Example of neutral oxides

Answer 18

H2o
No
Do