Chemistry

Question 1

How does acid rain affect the soil?

Answer 1

Acid rain effects soil by removing all its nutrients

Question 2

Do humans get affected by acid rain yes or no and why

Answer 2

Yes we get affected by acid rain because it damages the crops and can cause breathing problems and destroys our buildings

Question 3

Name three things fire needs to burn

Answer 3

It needs heat, fuel and oxygen

Question 4

What is the most reactive metal?

Answer 4

Potassium

Question 4

How can you tell a chemical is burning?

Answer 4

You can tell when it makes a fizzing/sizzling sound and bubbles of gas are released

Question 5

Another metal that reacts like potassium?

Answer 5

Sodium

Question 6

Which metal is the least reactive?

Answer 6

Platinum

Question 7

Diluting an alkali makes it less alkaline and eventually the pH of the solution __________ towards pH 7

Answer 7

________= decrease

Question 8

A bee sting is ____ so we use _______ to neutralise it

Answer 8

____= acid
________= baking powder

Question 9

What is the most and least reactive metal?

Answer 9

Most= potassium
Least= platinum

Question 10

Diluting acids makes it less acidic eventually neutral. The pH of the solution ________ to pH 7

Answer 10

_____=increases

Question 11

What is the chemical name for burning?

Answer 11

Combustion

Question 12

What are these metals in order the metals are: zinc, platinum, potassium, nickel

Answer 12

1.potassium, zinc, nickel, platinum

Question 13

Remember acids will turn universal indicator warm colours like red and what else

Answer 13

Yellow and orange

Question 14

What colour will universal indicator be if you put alkali?

Answer 14

Purple and dark blue

Question 15

What is 1-7 and 7-14 on the pH scale?

Answer 15

1-7 is acids
7-14 is alkalis
7 is nurtural

Question 16

Give three examples of an substance that has acids, alkalis or numeral (3 each)

Answer 16

Acids= lemon juice, lemonade, vinegar
Alkalis= window cleaner, soapy water and bleach
Nuteral= salt water, water, sugary water

Question 17

State two gases that contribute with acid rain

Answer 17

Sulphur dioxide and nitrogen oxides

Question 18

What is an indicator?

Answer 18

An indicator is a special dye that changes colours in different conditions

Question 19

Usually _____ are things we observe/ drink and _______ are cleaning products and _________ is water

Answer 19

_____ acids
________ alkalis
____________ neutrals

Question 20

With indicator what colour does acid alkali and water change into?

Answer 20

Acid=red
Alkali=yellow
Water= dark blue/ purple

Question 21

What is the pH scale?

Answer 21

The pH scale is a scale that is used to measure the acidity or the alkalinity of a chemical 1-6 being acids 7 neutral and 8-14 is alkalis

Question 21

Where does sulphur dioxide come from?

Answer 21

Sulphur dioxide comes from factories and industrial plants

Question 22

How does sulphur and nitrogen dioxide cause acid rain?

Answer 22

Sulphur dioxide and nitrogen oxide react with water in the clouds.

Question 23

Where does nitrogen dioxide come from?

Answer 23

Nitrogen dioxide comes from car engines joining nitrogen and oxygen (spark club)

Question 24

State three ways how to stop acid rain.

Answer 24

1.scrubbing 2.react the sulphur in oil with hydrogen 3.add catalytic converts in the exhaust pipe of all our motor vehicles.

Question 25

The stomach contains ___________ acid. If there is to much acid in the stomach it can cause _________. Tablets can be taken than contain a weak _____ to neutralise the acid

Answer 25

____________ hydrochloric acid __________ indigestion _______ alkali