Chapter 25 - The Air & Oxygen

Question 1

What is the chemical equation for the preparation of oxygen?

Answer 1

2 H2O2 -> 2H20 + O2

Question 2

What catalyst is used in the decomposition of hydrogen peroxide?

Answer 2

Manganese dioxide (MnO2)

Question 3

What is a catalyst?

Answer 3

A substance which changes the speed of a reaction but is not used up in the reaction itself.

Question 4

How can we test for oxygen?

Answer 4

It rekindles a glowing splint.

Question 5

What is the product when carbon is burned in oxygen?

Answer 5

Carbon dioxide

Question 6

When carbon dioxide is added to water what does it form? It this acidic or basic?

Answer 6

It forms a carbonic acid which is acidic.

Question 7

What colour is magnesium when it is burned in oxygen?

Answer 7

A brilliant white

Question 8

What is formed when magnesium is burned in oxygen?

Answer 8

The compound magnesium oxide (a white powder)

Question 9

What is the word equation for the preparation of oxygen?

Answer 9

Hydrogen Peroxide -> Oxygen & Water