Neutralisation

Question 1

What is neutralisation?

Answer 1

Neutralisation is a chemical reaction between an acid and a base that produces a salt and water.

Question 2

What are the products of a neutralisation reaction?

Answer 2

The products of a neutralisation reaction are a salt and water.

Question 3

True or False: Neutralisation reactions always produce carbon dioxide.

Answer 3

False.

Question 4

Fill in the blank: An acid reacts with a ____ to undergo neutralisation.

Answer 4

base

Question 5

What is the general formula for a neutralisation reaction?

Answer 5

HA + BOH → BA + H2O, where HA is the acid and BOH is the base.

Question 6

What type of pH results from a neutralisation reaction?

Answer 6

A neutralisation reaction typically results in a pH of 7.

Question 7

Name one common strong acid used in neutralisation.

Answer 7

Hydrochloric acid (HCl).

Question 8

Name one common strong base used in neutralisation.

Answer 8

Sodium hydroxide (NaOH).

Question 9

What is the role of water in a neutralisation reaction?

Answer 9

Water is one of the products formed during a neutralisation reaction.

Question 10

True or False: Neutralisation can occur in both aqueous and non-aqueous solutions.

Answer 10

True.

Question 11

What type of reaction is neutralisation classified as?

Answer 11

A double displacement reaction.

Question 12

What is an example of a weak acid that can undergo neutralisation?

Answer 12

Acetic acid (CH3COOH).

Question 13

What is an example of a weak base that can undergo neutralisation?

Answer 13

Ammonium hydroxide (NH4OH).

Question 14

What is the importance of neutralisation in everyday life?

Answer 14

Neutralisation is important for regulating pH in various applications, including agriculture and medicine.

Question 15

Fill in the blank: The reaction of sulfuric acid and sodium hydroxide produces sodium ____.

Answer 15

sulfate

Question 16

What is the term for the point in a titration where neutralisation occurs?

Answer 16

The equivalence point.

Question 17

True or False: All neutralisation reactions are exothermic.

Answer 17

False.

Question 18

What is the endpoint in a neutralisation titration?

Answer 18

The point at which the indicator changes color, indicating that neutralisation is complete.

Question 19

How can you determine the pH of a solution after a neutralisation reaction?

Answer 19

By using pH indicators or pH meters.

Question 20

What is the purpose of an indicator in a neutralisation reaction?

Answer 20

To signal the completion of the reaction by changing color.

Question 21

What is the neutralisation reaction between hydrochloric acid and sodium bicarbonate?

Answer 21

HCl + NaHCO3 → NaCl + CO2 + H2O.

Question 22

What happens to the pH of an acid when it is neutralised?

Answer 22

The pH increases towards neutral (7).

Question 23

What happens to the pH of a base when it is neutralised?

Answer 23

The pH decreases towards neutral (7).

Question 24

True or False: Neutralisation reactions can produce gas.

Answer 24

True.

Question 25

What is the term for the salt produced from the reaction of nitric acid and potassium hydroxide?

Answer 25

Potassium nitrate (KNO3).

Question 26

What is the effect of temperature on neutralisation reactions?

Answer 26

Temperature can affect the rate of reaction and the extent of heat released.

Question 27

What is a common use of neutralisation in agriculture?

Answer 27

To adjust soil pH for optimal crop growth.

Question 28

Fill in the blank: In a neutralisation reaction, the acid donates a proton (H+) to the ____.

Answer 28

base

Question 29

What type of neutralisation reaction occurs in the stomach?

Answer 29

The neutralisation of gastric acid by antacids.

Question 30

What gas is produced when hydrochloric acid reacts with sodium carbonate?

Answer 30

Carbon dioxide (CO2).

Question 31

True or False: Neutralisation reactions are always safe and non-hazardous.

Answer 31

False.

Question 32

What is the significance of neutralisation in wastewater treatment?

Answer 32

To neutralise acidic or basic wastes before discharge into the environment.

Question 33

What is the neutralisation reaction between phosphoric acid and sodium hydroxide?

Answer 33

H3PO4 + NaOH → Na3PO4 + H2O.

Question 34

What is a common household item that can act as a base in neutralisation?

Answer 34

Baking soda (sodium bicarbonate).

Question 35

Fill in the blank: The neutralisation of an acid with a carbonate produces ____ in addition to salt and water.

Answer 35

carbon dioxide

Question 36

What is the term for the reaction of a strong acid with a strong base?

Answer 36

Complete neutralisation.

Question 37

What happens to the temperature of the solution during exothermic neutralisation?

Answer 37

The temperature of the solution increases.

Question 38

What is A precipitate

Answer 38

An insoluble solid that forms when two solutions react, often occurring in neutralization if one product is insoluble.

Question 39

What is Buffer?

Answer 39

A solution that resists changes in pH upon adding small amounts of acid or base.