CH6

Question 1

Definition of Acid

Answer 1

Chemical substances that ionises in water to produce hydrogen ions

Question 2

Definition of alkali

Answer 2

Chemical substance that ionises in water to produce Hydroxide ions

Question 3

Definition of basicity of acid

Answer 3

Number Hydrogen ions produced by one acid molecule that ionises in water

Question 4

Why does acid not show acidic properties without water

Answer 4

Without water, acid does not ionises to produce hydrogen Ion
Acids only exist as molecules
Hydrogen ion does not move freely

Question 5

Why does alkali not show alkaline properties without water

Answer 5

Without water, alkaline does not ionises to produce Hydroxide Ions
Alkali Exist as molecules
Hydroxide ion does not move freely

Question 6

Definition of Ph Value

Answer 6

Logarithmic measure of concentration of Hydrogen ion in an aqueous solution

Question 7

Definition of strong acid

Answer 7

Acids that ionises completely in water to produce high concentration of Hydrogen Ions

Question 8

Definition of strong alkali

Answer 8

Alkali that ionises completely in water to produce high concentration of Hydroxide Ions

Question 9

Definition of weak acid

Answer 9

Acids that ionises partially in water to produce low concentration of Hydrogen Ions

Question 10

Definition of weak alkali

Answer 10

Alkali that ionises partially in water to produce high concentration of Hydroxide Ions

Question 11

Definition of degree of ionisation

Answer 11

Strength of acid or alkali to ionises in water

Question 11

Product of Reaction between base and acid

Answer 11

Water and salt only

Question 12

Product of Reaction between acid and metal carbonate

Answer 12

Salt, Water, Carbon Dioxide gas

Question 13

Product of Reaction between acid and reactive Metal

Answer 13

Hydrogen gas, Salt

Question 14

Product of Reaction between Alkali and Ammonium Salt

Answer 14

Ammonia Gas, Salt, Water

Question 15

Product of Reaction between Alkali and metal Ions

Answer 15

Insoluble metal hydroxide precipitate

Question 16

Definition of Concentration of solution

Answer 16

Measurement of Quantity of solutes dissolved in a unit volume of solution

Question 17

Definition of Molarity

Answer 17

Number of moles of solutes found in 1dm^3 of a solution

Question 18

Definition of Standard Solution

Answer 18

A solution with known concentration

Question 19

2 Important Parameters when preparing a standard solution

Answer 19

Mass Of Solute
Volume of Distilled Water

Question 20

Why is Sodium Hydroxide not suitable for standard solution

Answer 20

Hygroscopic

Question 21

Explanation of Dilution Method

Answer 21

Distilled water is added to aqueous solution to alter concentration of the solution

Question 22

Definition Neutralisation

Answer 22

Reaction between an acid and a base to produce water and salt only

Question 23

Is Bee sting acidic

Answer 23

yes

Question 24

is wasp sting acidic

Answer 24

no. it is alkaline

Question 25

Definition of Titration Method

Answer 25

Quantitative analysis method to determine volume of acid needed to completely neutralise a given volume of alkali and vice versa

Question 26

Definition of end point of Titration method

Answer 26

The point in titration where acid-base indicator change colour after all hydrogen ions completely neutralise hydroxide ions to produce water molecule

Question 27

Definition of Salt

Answer 27

Ionic compound formed when Hydrogen ions of an acid is replaced with metal ions or ammonium ion

Question 28

use of Ammonium Nitrate

Answer 28

Fertiliser

Question 29

use of Iron ii sulphate

Answer 29

pesticides

Question 30

use of Calcium Sulphate

Answer 30

Plaster of Paris

Question 31

use of Potassium Manganate (VII)

Answer 31

antiseptic to treat wounds

Question 32

use of sodium chloride

Answer 32

flavor

Question 33

Use of sodium bicarbonate

Answer 33

raising dough

Question 34

use of sodium benzoate

Answer 34

Preserve chili tomato and oyster source

Question 35

use of Sodium nitrate

Answer 35

preserve processed food