Chp 9.2: Bases

Question 1

What is a base?

Answer 1

A base is a substance that reacts with an acid to form salt and water ONLY.

Question 2

What is the general equation of a base?

Answer 2

Base + acid -> salt + water

Question 3

Example of base?

Answer 3

-Metal Oxide
-Metal hydroxide

Question 4

When ammonium chloride is added into the sodium hydroxide , what did you observe?

Answer 4

Effervescence

Question 5

What will happen to the red litmus paper?

Answer 5

It will turn red litmus paper blue.

Question 6

Colourless solution left in test tube after testing for ammonia ?

Answer 6

Sodium chloride solution

Question 7

Name all 6 insoluble bases.

Answer 7

1) Sodium oxide
2) Potassium oxide
3) Sodium hydroxide
4) Potassium hydroxide
5) Calcium hydroxide
6) Aqueous ammonia

Question 8

Name all soluble bases

Answer 8

1) Magnesium Oxide
2) Copper (II) oxide
3) Iron ( II ) oxide
4)Zinc oxide
5) Zinc hydroxide

Question 9

Example of :
Acid + Alkali -> salt + water?

Answer 9

Sulfuric acid + sodium hydroxide
-> sodium hydroxide + water

Question 10

Example of :
Alkali + ammonium salt ->
Salt + water + ammonia gas?

Answer 10

Sodium hydroxide + ammonium chloride-> sodium + water + ammonia.

Question 11

SPCA?

Answer 11

Sodium , potassium , calcium , ammonia .