Unit 2- Acids, Bases And Salts

Question 1

What ions makes solutions acidic? And ions that make solutions alkali?

Answer 1

Acidic: H+ ions
Alkali: OH- ions

Question 2

What does and Acid + base make?

Answer 2

Salt + water

Question 3

What does acid + metal make?

Answer 3

Salt + hydrogen

Question 4

What salt would hydrochloric acid and copper oxide form?

Answer 4

Copper chloride

Question 5

What do metals or insoluble bases react to make?

Answer 5

Soluble salts

Question 6

What are the three steps in crystallisation?

Answer 6

1) mix an acid and another substance
2) filter out the liquid
3) evaporate excess liquid

Question 7

What do you make soluble salts with?

Answer 7

Alkali

Question 8

How do you make a soluble salt using alkali?

Answer 8

Add right amount of acid to neutralise alkali, us indicator to make sure. Then keep adding acid and alkali to uncontaminate it. Then evapourate

Question 9

What do precipitation reactions make?

Answer 9

Insoluble salts

Question 10

What happens in a precipitation reaction?

Answer 10

Mix the ions in the solution and let them precipitate to the bottom, filter out the liquid

Question 11

What is an alkali?

Answer 11

A base that dissolves in water