Metals Acids And Ph

Question 1

Define concentration

Answer 1

How much substance there is in a give volume

Question 2

What would it be called if there were few particles in a given volume

Answer 2

Dilute

Question 3

If acids and alkalis are more concentrated what would that mean?

Answer 3

They are stronger than if they were dilute

Question 4

What colour would a very acidic liquid be?

Answer 4

Red

Question 5

What colour would a very alkali liquid be

Answer 5

Purple

Question 6

What colour would a neutral liquid be?

Answer 6

Green

Question 7

What numbers does the ph scale go up to

Answer 7

1 - 14

Question 8

What numbers are 1-6

Answer 8

Acidic

Question 9

What numbers are 8 - 14

Answer 9

Alkali

Question 10

What are indicators?

Answer 10

Used to measure how acid or alkali a substance is

Question 11

What is the universal indicator?

Answer 11

A different colour for each Ph

Question 12

What is the litmus indicator?

Answer 12

Blue is Alkali
Red is Acidic

Question 13

What are some examples of strong acids? (3)

Answer 13

• hydrochloric
• sulphuric
• Nitric

Question 14

What are some examples of weak acids? (3)

Answer 14

• Citric acids
• Acetic
• Formic

Question 15

What are some examples of strong alkalis? (2)

Answer 15

• sodium hydroxide
• ammonia

Question 16

What are some examples of weak alkalis (2)

Answer 16

• milk of magnesia
• Calcium carbonate

Question 17

Are alkalis and acids soluable or Insoluble?

Answer 17

Alkalis are soluble
Acids are insoluble

Question 18

What does corrosive mean?

Answer 18

They can destroy skin and dissolve material (strong or concentrated)

Question 19

What does irritant mean ?

Answer 19

They may burn skin and cause blisters (weak or dilute)

Question 20

When does neutralisation occur?

Answer 20

When an acid and an alkali are mixed together

Question 21

What is the equation for neutralisation

Answer 21

Acid + base ~> Salt + water

Question 22

How are salts named?

Answer 22

After the metal, and the acid

Question 23

What does ph does stomach have

Answer 23

About 1

Question 24

How is indigestion/heartburn occur?

Answer 24

If the stomach acid moves up the digestive tract

Question 25

What are antacids?

Answer 25

Medicines that contain bases that can neutralise stomach acids

Question 26

What type of base do you want to counteract the strong stomach acids

Answer 26

Weaker because you still want some acid

Question 27

What are two examples bases in antacid medicines

Answer 27

• magnesium hydroxide
• Calcium carbonate