Hydrogen & Oxygen

Question 1

What is the test for Hydrogen?

Answer 1

• Collect gas and ignite it with a lighted splint - hydrogen explodes with a squeaky pop

Question 2

What is the test for Oxygen?

Answer 2

• Collect gas & insert a glowing splint into the tube - Oxygen will re-light the glowing splint

Question 3

What percentage of Nitrogen is in the air?

Answer 3

78%

Question 4

What percentage of Oxygen is in the air?

Answer 4

21%

Question 5

What percentage of Argon is in the air?

Answer 5

1%

Question 6

How are gases extracted?

Answer 6

By fractional distillation

Question 7

How can hydrogen & oxygen be produced?

Answer 7

Water by electrolysis & twi amount of hydrogen is produced than oxygen

Question 8

What is the Word equation for water by electrolysis?

Answer 8

Water - Oxygen + Hydrogen

Question 9

What is the symbol qquation for water by electrolysis?

Answer 9

2H2O(l) - 2H2(g) + O2(g)

Question 10

How do you make water (Symbol Equation)?

Answer 10

2H2(g) + O2(g) - 2H2O(l)

Question 11

How do you make water (Word Equation)?

Answer 11

Hydrogen + Oxygen - Water

Question 12

What are the uses of oxygen?

Answer 12

• Medicine - aid to breath
• High temperatures
• Liquid form to burn

Question 13

What are the uses of Hydrogen?

Answer 13

• Making Hydrocarbons
• Making Margarine
• Fuel

Question 14

Advantages of Hydrogen Fuel?

Answer 14

• High energy

- Non-pollutiong

Question 15

Disadvantages of Hydrogen Fuel?

Answer 15

• Highly Flammable

- Few Filling Stations