Unit Two: Acids and Alkalis

Question 1

What is an acid?
What is an alkali?
What is a base?

Answer 1

Acid:
a substance with a PH of less than 7
acids form H+ ions in water

Alkali:
a base that dissolves in water
alkalis form OH- ions in water

Base:
a substance with a PH of more than 7

Question 2

What do metals and acids reacted together create?

Answer 2

Salts:

acid + metal —> salt + hydrogen

Question 3

How do you make an insoluble salt?

Answer 3

Using a precipitation reaction