WorksheetsChem F4 : Acid,Base,Salt
Total questions: 30
Worksheet time: 25mins
NaOH may be found in drain cleaners and as a component of soaps. Is NaOH an acid or a base?
Acid
Base
Neither (Neutral)
Which of the following is NOT part of the definition of salt?
Ionic compound
when hydrogen ion of an acid
is replaced by a metal cation or ammonium ion
contains hydrogen ions
Salts that are made with hydrochloric acid are called ______________.
chlorides
sulfates
nitrates
carbonates
Which of the following statements best define the term ‘salt’?
Salt is formed when metal reacts with an alkali.
Salt contains sodium ions and chloride ions.
Salt is formed from a weak Van der Waals’ forces of attraction.
Salt is formed when the hydrogen ions in an acid is replaced by metal or ammonium ions.
Which of the following are the physical characteristics of salt crystal?
I They have similar size.
II They have fixed angle.
III They have fixed geometrical shapes.
IV They have flat surface, straight edges and sharp angles.
I, II and III
I, II and IV
I, III and IV
II, III and IV
Salts that are made with nitric acid are called ______________.
chlorides
sulfates
nitrates
carbonates
Which of the following is soluble salt?
Magnesium carbonate
Sodium nitrate
Silver chloride
Barium sulphate
Which of the following is insoluble salt?
Sodium carbonate
Ammonium sulphate
Lead(II) chloride
Potassium nitrate
Which of the following group of salt is all soluble?
Carbonate salt
Chloride salt
Sulphate salt
Nitrate salt
Acid react with metal carbonate to form
Salt + Carbon dioxide
salt + hydrogen
Salt + Water
Salt + Carbon dioxide + Water
How to test carbon dioxide gas?
pop sound with lighted pop sound
limewater turns cloudy
relits glowing splint
moist red litmus paper turns blue
How to test hydrogen gas?
pop sound with lighted splint
pop sound with glowing splint
limewater turns cloudy
moist red litmus paper turns blue
What is the gas produced when acid reacts with carbonate?
hydrogen
carbon dioxide
ammonia
oxygen
Alkali that ionises partially in water will have high pH value.
True
False
Which statement is correct about an alkali
Strong alkali has low pH value
Strong alkali ionise partially in water
Strong alkali has high concentration of H+ ions
Strong alkali dissociate completely in water
Which statement is correct about an acid?
The higher the concentration of acid, the higher the pH value
The lower the concentration of acid, the lower the pH value
The higher the concentration of H+ ions, the lower the pH value
The higher the concentration of H+ ions, the higher the pH value
Which of the substance is a weak alkali?
sodium hydroxide solution
ammonia gas
ammonia solution
Potassium hydroxide solution
Which of the substance is a strong acid?
NH3
NaOH
CH3COOH
HNO3
A base that ionises in water s called .....
Acid
Alkali
Molecule
Ion
Potassium hydroxide, KOH can exhibit the following properties when dissolved in benzene(organic solvent) :
turn blue litmus paper to red
turn red litmus paper to blue
no reaction
Basicity of acids is ...
Reaction to produce salt and water
Number of hydrogen ions produces by acid molecule when ionise in water
Number Number of hydroxonium ions produces by acid molecule when ionise in water
What is an alkali?
Substance that ionise in water to produce hydrogen ions
Substance that produce water when react with metal
A base that is soluble in water
A substance can be classified as acid if it can produce
Salt and water are produced when acid reacts with alkali. Salt produced is
acidic.
alkaline.
neutral.
Ionic bonds form between ---
Ikatan ionik terbentuk antara ---
nonmetals
bukan logam
metals and nonmetals
logam dan bukan logam
metals
logam
What type of bond is shown in the image?
Hydrogen
Ionic
Covalent
dative
Why do atoms get involved in the formation of a chemical bond?
To get a neutral charge
To increase density
To achieve a stable electron arrangement
To increase heat energy
Which of the following is / are example(s) of organic solvent, except
toluene
tetrachloromethane
benzene
water
