Acids and Alkalis

Question 1

Acid + metal

Answer 1

Salt + hydrogen

Question 2

Metal oxide + acid

Answer 2

Salt + water

Question 3

Metal hydroxide + acid

Answer 3

Salt + water

Question 4

Metal carbonate + acid

Answer 4

Salt + water + carbon dioxide

Question 5

What happens to the PH if the concentration of hydrogen ions increases by a factor of 10.

Answer 5

PH decreases by 1

Question 6

What happens to the PH if the concentration of hydrogen decreases by a factor of 10?

Answer 6

The PH increases by 1.

Question 7

What ions are acids sources of?

Answer 7

Hydrogen (H+) ions.

Question 8

What ions are alkalis sources of?

Answer 8

Hydroxide (OH-) ions. They are also soluble bases.

Question 9

Test for hydrogen?

Answer 9

Squeaky pop test using lit splint.

Question 10

Strong acids vs weak acids.

Answer 10

Strong acids completely dissociate into ions in a solution.

Weak acids only partially dissociate into ions in a solution.

Question 11

Litmus paper PH readings:

Answer 11

1-7: Red

7-14: Blue

Question 12

Method orange PH readings:

Answer 12

1-7: Red

7-14: Yellow

Question 13

Phenolphthalein PH readings:

Answer 13

1-7: Colourless

7-14: Pink

Question 14

All nitrates are soluble, apart from…

Answer 14

Lead and silver.

Question 15

Universal indicator PH readings:

Answer 15

1-7: Red
7 - Neutral (green)
7-14 - Purple