Font size
WorksheetsSalt Preparation, Oxides, QA
Total questions: 40
Worksheet time: 21mins
Which of the following salts is prepared by precipitation method?
sodium chloride
barium sulfate
calcium nitrate
ammonium carbonate
Which two solutions, when mixed together, will form a precipitate?
dilute hydrochloric acid and barium nitrate
dilute sulfuric acid and sodium hydroxide
dilute hydrochloric acid and lead (II) nitrate
dilute nitric acid and zinc chloride
Which method is used to prepare silver chloride?
Add excess silver oxide/ silver carbonate to acid, followed by filtration
Titration
Precipitation
Which method is used to prepare lead (II) chloride?
Add excess solid lead(II) oxide/ carbonate to acid, followed by filtration
Titration
Precipitation
Precipitation involves mixing ___________ to form an insoluble solid that separates out from the reaction mixture.
acid and alkali
acid and metal
two acids
two solutions
Bryan wants to prepare silver chloride in the science laboratory. Which of the following reactants should he use?
silver + hydrochloric acid
silver hydroxide + hydrochloric acid
silver nitrate solution + potassium chloride solution
silver + chlorine gas
Which method is most appropriate for preparing barium sulfate?
Titration
Precipitation
Which method is used to prepare copper (II) sulfate?
Add excess solid CuO/ CuCO3/ Cu(OH)2 to acid
Titration
Precipitation
Which method is used to prepare zinc chloride?
Add excess solid zinc/ zinc oxide/ zinc hydroxide/ zinc carbonate to acid
Titration
Precipitation
After adding FeO with HNO3, what is my next step to prepare Fe(NO3)2 crystals?
Filtration to get the residue
Filtration to get the filtrate
Evaporation to dryness
Crystallisation
After adding Cu(OH)2 with H2SO4, what is my next step to prepare CuSO4 crystals?
Filtration to get the residue
Filtration to get the filtrate
Evaporation to dryness
Crystallisation
How can I prepare a sample of potassium chloride?
Add HCl to K metal
Ttrate HCl to KOH once with indicator, then again without
Titrate HCl to KOH with indicator
Add KNO3 (aq) to NaCl(aq)
Titration is the only method to prepare soluble salt.
True
False
Which salt can be prepared using titration?
copper(II) nitrate
lead(II) sulfate
ammonium sulfate
iron(II) chloride
Select the statements that are true of amphoteric oxides.
They are mostly insoluble in water.
They do not react with acids and alkalis.
They react with acids to form salt and water.
They react with akalis for form salt and water.
Which is the ionic equation of the reaction between hydrochloric acid and sodium hydroxide?
Na+ (aq) + Cl- (aq) --> NaCl (aq)
H+ (aq) + OH- (aq) --> H2O (l)
H- (aq) + OH+ (aq) --> H2O (l)
Select the precipitation reaction(s).
Ba2+ (aq) + 2NO3- (aq) --> Ba(NO3)2 (aq)
Ca2+ (aq) + SO42- (aq) --> CaSO4 (s)
Ca2+ (aq) + 2Cl- (aq) --> CaCl2 (aq)
Pb2+ (aq) + Cl- (aq) --> PbCl2 (s)
Mg2+ (aq) + OH- (aq) --> Mg(OH)2 (s)
Select the amphoteric oxides.
aluminium oxide
carbon dioxide
lead(II) oxide
potassium oxide
zinc oxide
Carbon monoxide, water and nitrogen monoxide are examples of (a) oxides.
Which statement is false of acidic oxides?
They are oxides of non-metals.
They dissolve in water to form acids.
They do no react with acids or alkalis.
They react with alkalis to form salt and water.
Select the statements that are true of basic oxides.
They are oxides of metals.
They dissolve in water to form acids.
They react with acids to form salt and water.
They react with bases to form salts and water.
Which solubility rule is true for oxides?
All are soluble except those of Group I and ammonium.
All are insoluble except those of Group I and ammonium.
All are soluble except those of silver and lead,
All are soluble except those of calcium, lead and barium.
Zinc nitrate can be prepared by reacting nitric acid with excess solid. Which of the following solids cannot be used in the preparation of zinc nitrate?
Zinc
zinc sulfate
zinc oxide
zinc carbonate
Which pair of reagents can be used to prepare copper(II) sulfate salt?
Copper metal with dilute sulfuric acid
Copper(II) nitrate with sodium sulfate
Copper(II) chloride and dilute sulfuric acid
Copper(II) carbonate with dilute sulfuric acid
Why is solid calcium oxide added in excess to dilute nitric acid when preparing calcium nitrate salt?
To ensure all calcium hydroxide is used up
To speed up the reaction
To ensure all dilute nitric acid is used up
To have maximum yield of calcium nitrate
Which of the following can be prepared by titration?
Ammonium sulfate
Potassium carbonate
Sodium sulfate
Lithium chloride
How would you prepare a sample of potassium chloride safely in the laboratory?
Add excess potassium metal to dilute hydrochloric acid
Titrate dilute HCl with aqueous KOH with an indicator
Titrate dilute HCl with aqueous KOH once with indicator, then again without
Mix aqueous potassium nitrate with aqueous sodium chloride
After adding aqueous Ca(NO3)2 to dilute H2SO4, what is my next step to prepare a sample of CaSO4?
Crystallisation
Evaporation to dryness
Filtration to get the filtrate
Filtration to get the residue
Which of the following can be prepared by titration?
Magnesium sulfate
Zinc carbonate
Lead (II) sulfate
Lithium chloride
Which of the following can be used to remove carbon dioxide from a mixture of carbon dioxide and hydrogen?
calcium oxide
sulfur dioxde
oxygen
limewater
Which of the following can be used to remove ammonia that is mixed with oxygen?
Calcium oxide
sulfur dioxide
carbon dioxde
limewater
A mixture of nitrogen dioxide, oxygen and carbon dioxide are passed through a test tube filled with substance X. At the end, only oxygen was collected. What could substance X be?
Sodium hydroxide solution
Aluminium oxide
Phosphorus oxide
Calcium oxide
What gas is formed when ammonium chloride is warmed with aqueous sodium hydroxide?
Ammonia
Chlorine
Oxygen
Hydrogen
Which gas changes damp litmus paper from red to blue?
Ammonia
Carbon dioxide
Chlorine
Hydrogen
Which ion, in aqueous solution, forms a white precipitate when dilute sulfuric acid is added?
K+
Ba2+
Cu2+
Fe2+
A metallic ion in aqueous solution produces
(i) white precipitate with aqueous sodium hydroxide, soluble in excess to produce a colourless solution.
(ii) white precipitate with aqueous sodium hydroxide, soluble in excess to produce a colourless solution.
What is the metallic ion?
Al3+
Ca2+
K+
Zn2+
Aqueous sodium hydroxide reacts with a metal ion producing a coloured precipitate. This precipitate changes colour on standing. What is the ion present?
Al3+
Cu2+
Fe2+
Fe3+
After acidification with dilute nitric acid, a colourless solution of X reacts with aqueous silver nitrate to give a white precipitate. What could X be?
Calcium iodide
Copper(II) chloride
Lead(II) iodide
Sodium chloride
A salt is dissolved in water to form an unknown solution Z.
Test 1: White precipitate formed and then dissolved when excess aqueous ammonia is added to a sample of solution Z.
Test 2: White precipitate is formed when acidified aqueous barium nitrate is added to a sample of solution Z.
What is the salt?
Aluminium chloride
Aluminium sulfate
Zinc chloride
Zinc sulfate
A pale green solution X gives a green precipitate with excess aqueous sodium hydroxide. An alkaline gas is only given off when the mixture is warmed with aluminium powder. What ions does X contain?
Ammonium and copper(II)
Ammonium and iron(II)
Nitrate and copper(II)
Iron(II) and nitrate
