WorksheetsXIII - 2 Preparation of Salt Methods
Total questions: 20
Worksheet time: 23mins
Which of the following salts is prepared by precipitation method?
sodium chloride
barium sulfate
calcium nitrate
ammonium carbonate
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
Which of the following methods is used to prepare zinc sulfate?
Add excess zinc chloride to aqueous sodium sulfate
Tiltrate dilute H2SO4 with aqueous Zn(OH)2 with an indicator, then again without
Add excess solid zinc oxide to dilute sulfuric acid
Mix aqueous zinc nitrate with aqueous potassium sulfate
After titrating aqueous NaOH with dilute HCl without indicator, what is my next step to obtain a sample of NaCl ?
Filtration
Evaporation to dryness
Repeat the titration
Evaporate to saturation, then cool the solution
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
Why is solid calcium hydroxide 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 method of preparation of a pure salt solution requires the use of a pipette and burette?
BaCl2 + Na2SO4 --> BaSO4 + 2NaCl
CuO + HCl --> CuCl2 + H2O
NaOH + HCl --> NaCl + H2O
MgCO3 + H2SO4 --> MgSO4 + H2O + CO2
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
Copper(II) sulfate crystals are blue. They are made by adding an excess of copper(II) oxide to sulfuric acid.
The mixture is heated and stirred.
The mixture is then filtered and the filtrate is allowed to evaporate, leaving blue crystals.
Why is filtration necessary?
to remove soluble impurities
to remove sulfuric acid
to remove the blue crystals
to remove unreacted copper(II) oxide
Which barium salts are soluble in water?
1. barium carbonate
2. barium chloride
3. barium nitrate
4. barium sulfate
1 and 2
1 and 4
2 and 3
3 and 4
Copper(II) sulfate is prepared by adding excess copper(II) carbonate to sulfuric acid.
Why is an excess of copper(II) carbonate added?
to ensure all the copper(II) carbonate has reacted
to ensure all the sulfuric acid has reacted
to increase the rate of reaction
to increase the amount of copper(II) sulfate produced
Which substance reacts with dilute sulfuric acid to form a salt that can be removed from the resulting
mixture by filtration?
aqueous barium chloride
aqueous sodium hydroxide
copper
copper(II) carbonate
Which type of reaction is represented by the equation shown?
Pb2+(aq) + 2NO3– (aq) + 2Na+ (aq) + 2I– (aq) PbI2(s) + 2Na+ (aq) + 2NO3– (aq)
addition
redox
neutralisation
precipitation
Copper(II) sulfate is formed by reacting excess solid copper(II) carbonate with dilute sulfuric acid.
Which processes are part of the preparation of solid copper(II) sulfate?
1 crystallisation
2 distillation
3 filtration
4 titration
1 and 3
1 and 4
2 and 3
2 and 4
Which method is used to prepare silver chloride?
Add excess solid reactant to acid
Titration
Precipitation
Which of the following is insoluble?
silver chloride
zinc chloride
potassium chloride
ammonium chloride
Which method is used to prepare barium sulphate?
Add excess solid reactant to acid
Titration
Precipitation
Which method is used to prepare lead (II) chloride?
Pb(NO3)2(aq) + NaCl (aq) --->
PbSO4(s)+ NaCl (aq) --->
PbCO3(s) + NaCl (aq) --->
__________ are soluble.
All carbonates
All chlorides
All nitrates
All sulfates
