WorksheetsSalt Preparation
Total questions: 20
Worksheet time: 10mins
For making sure that one reactant is completely used, the other reactant must be added in excess.
true
false
Calcium chloride is prepared from ______________ and hydrochloric acid
Calcium carbonate
Calcium
all of the above
Which of the following are the functions of calcium chloride? Choose two
Absorb moisture from air and known as drying agent
Used to speed up the setting of concrete
Making cosmetics
Treatment of sewage
When magnesium + hydrochloric acid, the products are
magnesium nitrate + hydrogen
Magnesium chloride + hydrogen
Magnesium chloride + carbon dioxide + water
Magnesium chloride + oxygen
In the reaction of metal carbonate and acid, the marble chips are added twice as the first one dissolve. Why does it dissolve?
The marble chips does not fully reacts with the acid
No bubbles of carbon dioxide produce in the first addition
Marble chips fully react with acid to produce carbon dioxide
To make sure acids will be in excess before the next step
Why do we need to filter the salt solution?
To make sure the residue is collected in the beaker
To separate the excess metal and get the filtrate
To allow the acid does not react anymore with the metal
To produce more bubbles of gas
What is the 3rd step in the preparation of salt?
filtration
crystallization
evaporation
mixing
Which of the following are true about the last step of preparation of salt? Choose two.
Solution is heated gently until solid appears
Solution is left to cool
Solution is filtered in the filter funnel
Filtered the salt onto the filter paper allow more evaporation to take place
Sodium carbonate + nitric acid -->
Sodium nitrate + carbon dioxide + hydrogen
Sodium nitrate + water + hydrogen
Sodium nitrate + carbon dioxide + water
Sodium nitrate + hydrogen
sodium + hydrochloric acid --> (a)
magnesium + nitric acid -->
(a)
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
