Calderglen High School

11 22 33 44 55

66 77 88 99 1010

Calderglen High School

Is nitrogen gas reactive or unreactive?

unreactiveunreactive

1

answer

Calderglen High School

Name the three essential elements required for healthy plant growth

Nitrogen (N)

Phosphorus (P)

Potassium (K)

2

answer

Calderglen High School

Calculate the percentage mass of nitrogennitrogen in NH4 NO3

Formula mass = 14 + 4 + 14 +(3x16) = 80% N = 28/ 80 x 100 = 35%

3

answer

Calderglen High School

Describe the appearance of

ammonia.

Colourless gas, pungent smell.

It is also soluble in water and turns damp pH

paper/universal indicator blue

4

answer

Calderglen High School

Why are fertilisers added to the soil?

To replace nutrients/essential

elements /nitrogen,

potassium or phosphorus

5

answer

Calderglen High School

What negative effect can artificial fertilisers have

on lochs and rivers?

Make them lifeless

6

answer

Calderglen High School

Which of the following compounds would be suitable fertilisers?

Copper chloride, ammonium nitrate, calcium phosphate

(must have N, P or K AND be soluble in water)

Ammonium nitrate - contains nitrogen / soluble

Copper chloride - does not contain essential elements

Calcium phosphate - is insoluble

7

answer

Calderglen High School

Name the two types of compounds which can be used to make ammonia in

the lab.

An ammonium compound and An ammonium compound and an alkalian alkali

eg. Ammonium chloride and potassium hydroxide

orammonium carbonate and soda lime

8

answer

Calderglen High School

What colour does ammonia turn damp

pH paper?

BlueBlue/purplepurple(It is an alkaline

substance)

9

answer

Calderglen High School

Give an advantage of using fertlisers?

Larger yield of crop.

10

answer