Module 2 - Acids

Question 1

When an acid is added to
water what ion is released into
the solution?

Answer 1

Hydrogen ion , H+

Question 2

Define acid

Answer 2

Proton donor

Question 3

Describe the dissociation of a
strong acid

Answer 3

Full dissociation

Question 4

Define base

Answer 4

Proton acceptor

Question 5

Which base is used to treat
acid indigestion?

Answer 5

Magnesium hydroxide

Question 6

What are alkalis?

Answer 6

Bases that can dissolve in water to form
aqueous hydroxide ions

Question 7

What are amphoteric
substances?

Answer 7

Substances that can act as acids and
bases

Question 8

What is formed when acid
reacts with carbonate?

Answer 8

Salt, carbon dioxide and water

Question 9

What is a salt?

Answer 9

A compound that is formed when H+
of
an ion is replaced by a metal ion or
positive ion

Question 10

What is formed when acids
react with metal oxide?

Answer 10

Salt and water

Question 11

What is formed when acid
reacts with alkali?

Answer 11

Salt and water

Question 12

What is formed when acids
react with metal?

Answer 12

Salt and hydrogen

Question 13

Why are the products same
when acid reacts with alkali or
metal oxides?

Answer 13

Both alkali and metal oxides are types of
bases

Question 14

How are ammonium salts
formed?

Answer 14

When acid reacts with aqueous
ammonia

Question 15

What are hydrated crystals?

Answer 15

A crystalline structure containing water

Question 16

What does anhydrous crystals
mean?

Answer 16

Crystalline form that contains no water

Question 17

What does a dot formula
indicate?

Answer 17

The amount of water present in a
crystalline structure

Question 18

Write down the methods to
carry out a titration

Answer 18

1. Using a pipette, measure the volume of a solution
2. Add the base into a conical flask and add an indicator into it
3. Add the acid solution into a burette and record the volume
4. Slowly add the solution in the burette into the conical flask
5. Swirl the mixture continuously until the end point is reached
6. Repeat until concordant results are obtained

Question 19

What is the colour of methyl
orange in an acid, base and at
end point?

Answer 19

● Acid - red
● Base - yellow
● End point - orange