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CHEMISTRY F4 > CH6 > Flashcards

CH6 Flashcards

1
Q

Definition of Acid

A

Chemical substances that ionises in water to produce hydrogen ions

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2
Q

Definition of alkali

A

Chemical substance that ionises in water to produce Hydroxide ions

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3
Q

Definition of basicity of acid

A

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

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4
Q

Why does acid not show acidic properties without water

A

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

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5
Q

Why does alkali not show alkaline properties without water

A

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

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6
Q

Definition of Ph Value

A

Logarithmic measure of concentration of Hydrogen ion in an aqueous solution

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7
Q

Definition of strong acid

A

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

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8
Q

Definition of strong alkali

A

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

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9
Q

Definition of weak acid

A

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

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10
Q

Definition of weak alkali

A

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

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11
Q

Definition of degree of ionisation

A

Strength of acid or alkali to ionises in water

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11
Q

Product of Reaction between base and acid

A

Water and salt only

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12
Q

Product of Reaction between acid and metal carbonate

A

Salt, Water, Carbon Dioxide gas

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13
Q

Product of Reaction between acid and reactive Metal

A

Hydrogen gas, Salt

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14
Q

Product of Reaction between Alkali and Ammonium Salt

A

Ammonia Gas, Salt, Water

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15
Q

Product of Reaction between Alkali and metal Ions

A

Insoluble metal hydroxide precipitate

16
Q

Definition of Concentration of solution

A

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

17
Q

Definition of Molarity

A

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

18
Q

Definition of Standard Solution

A

A solution with known concentration

19
Q

2 Important Parameters when preparing a standard solution

A

Mass Of Solute
Volume of Distilled Water

20
Q

Why is Sodium Hydroxide not suitable for standard solution

A

Hygroscopic

21
Q

Explanation of Dilution Method

A

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

22
Q

Definition Neutralisation

A

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

23
Q

Is Bee sting acidic

24
Q

is wasp sting acidic

A

no. it is alkaline

25
Q

Definition of Titration Method

A

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

26
Q

Definition of end point of Titration method

A

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

27
Q

Definition of Salt

A

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

28
Q

use of Ammonium Nitrate

A

Fertiliser

29
Q

use of Iron ii sulphate

A

pesticides

30
Q

use of Calcium Sulphate

A

Plaster of Paris

31
Q

use of Potassium Manganate (VII)

A

antiseptic to treat wounds

32
Q

use of sodium chloride

33
Q

Use of sodium bicarbonate

A

raising dough

34
Q

use of sodium benzoate

A

Preserve chili tomato and oyster source

35
Q

use of Sodium nitrate

A

preserve processed food

CHEMISTRY F4 (6 decks)

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