15 - Dynamic Equilibria, Calculations Involving Volume of Gases

Question 1

What is fertilisers?

Answer 1

Soluble compounds added to soil to replace the minerals used up by plants

Question 2

Which part of the plant absorbs water & mineral ions?

Answer 2

Root hair cells

Question 3

Why must fertilisers be soluble?

Answer 3

So they can be absorbed by root hair cells

Question 4

List 3 elements that is usually found in fertilisers

At least one element is in a fertiliser NOT all 3

Answer 4

• Nitrogen
• Phosphorus
• Potassium

Question 5

What is the purpose of Nitrogen, phosphorus and potassium in fertilisers?

Answer 5

Promotes plant growth

Question 6

Fertilisers containing Nitrogen, phosphorus and potassium are called what?

Answer 6

NPK fertilisers

Question 7

What type of substance is Ammonium nitrate?

Answer 7

A salt

Question 8

What does Nitrogenous mean?

Answer 8

Containing or supplying Nitrogen

Question 9

Give some examples of Nitrogenous fertiliser

Answer 9

• Ammonium nitrate
• Ammonium sulphate

Question 10

How is Ammonium nitrate produced?

Answer 10

Ammonia + nitric acid → ammonium nitrate

Reacts in a reversible reaction

Question 11

How is Ammonia manufactured?

Answer 11

Using the Haber process

Question 12

What are the reaction conditions for the Haber process?

Answer 12

• A temperature of 450°C
• A pressure of 200 atmospheres
• An iron catalyst

Question 13

What’s the chemical formula of Ammonium sulphate?

Answer 13

Question 14

What type of substance is Ammonium sulphate?

Answer 14

A salt

Question 15

What method would you use to make Ammonium sulphate in the lab?

Answer 15

Titration, then crystallisation

Question 16

Describe the starting materials for creating Ammonium sulphate in the lab

Answer 16

Ammonia solution & dilute sulphuric acid