WorksheetsAcids, bases and salts
Total questions: 23
Worksheet time: 32mins
1. An example of an acidic oxide is:
MgO
CO2
BaO
Na2O
After a compound X was added to water, the pH using indicator paper was less than 7. The resulting solution was added to some calcium carbonate and it was noted that effervescence took place. What could compound X be?
HNO3
MgO
Na2O
CaO
A solution was added to some ammonium chloride then heated. A gas which had a pungent smell and turned moist red litmus blue was produced. Which of the following could have been present in the original solution?
Hydrochloric acid
vinegar
potassium hydroxide
sodium chloride
Statements 1 to 4 represent different steps in the preparation of lead iodide. Which of the following is the best sequence for synthesizing lead iodide?
1. Mix lead nitrate and potassium iodide
2. Dry
3. Filter
4. Mix lead sulphate and potassium iodide
1, 3, 2
4, 3, 2
1, 4, 2
4, 2, 3
1. A salt was being prepared by adding an acid to a carbonate. However, after a while, the reaction ceased and a precipitate began to form without all of the carbonate reacting. Which of the following pairs of acid and carbonate
CaCO3, H2SO4
CuCO3, HCl
BaCO3, HNO3
Na2CO3, H2SO4
Sodium hydroxide was added to a solution and it was noticed that a white precipitate was formed at first then dissolved in excess. On adding aqueous ammonia to a fresh sample of the solution, a white precipitate was formed which did not dissolve in excess. Which ion could have been present in the solution?
Fe2+
Al3+
Zn2+
Ca2+
What is the best way of making zinc carbonate?
Shake solid zinc hydroxide with aqueous sodium carbonate
Shake solid zinc sulphate with and solid calcium carbonate with water
Shake solid zinc sulphate with water and add aqueous sodium carbonate
Shake aqueous zinc sulphate with solid calcium hydroxide and bubble in carbon dioxide
Which property does hydrochloric acid have?
It liberates ammonia from ammonium salts
It reacts with any base to give a salt
It reacts with any metal to give hydrogen
It turns red litmus paper blue
Aqueous ammonia was added to a solution of a salt. A blue precipitate was formed which dissolved to give a deep blue solution in excess ammonia. Which of the following ions could be present?
Cu2+
Fe2+
Pb2+
Fe3+
Which of the following is the best description of a salt?
Forms when two metals react
Forms when a carbonate reacts with sodium hydroxide
Forms when all or part of the hydrogen ions in an acid is replaced
Forms when two alkali reacts
A student was carrying out a test for anions and cations. He added acidified barium nitrate solution to an unknown solution and it remained unchanged. What can be concluded from this?
SO42- was present
Cl- was absent
NO3 – was present
SO42- was absent
A lighted splint was held over a flask in which a gas was given off. The splint went out with a pop. Which gas was given off?
hydrogen
chlorine
oxygen
ammonia
On adding acidified silver nitrate to a solution, a white precipitate was formed which went purple when in sunlight. Which of the following compounds could have been present?
MgBr2
NaI
NaCl
Fe(NO3)2
Barium sulphate is prepare using barium nitrate and sodium sulphate because:
Barium sulphate is insoluble
Barium sulphate is soluble
Barium sulphate will dissolve in water
Barium sulphate will react with other solutions
________________ is an example of an amphoteric oxide
aluminium oxide
carbon dioxide
sulphur dioxide
copper oxide
Which of the following is not a soluble base
sodium oxide
potassium hydroxide
copper oxide
potassium oxide
An acid anhydride
sulphur dioxide
aluminium oxide
zinc oxide
sodium oxide
A dibasic acid
sulphuric acid
nitric acid
phosphoric acid
hydrochloric acid
Found in vinegar
acetic acid
sulphuric acid
tartaric acid
carbonic acid
The following table shows the tests a student did on substance V and the conclusions made
from the observations. Complete the table by describing these observations for (a)
The following table shows the tests a student did on substance V and the conclusions made
from the observations. Complete the table by describing these observations for (b) i and ii
The following table shows the tests a student did on substance V and the conclusions made
from the observations. Complete the table by describing these observations for (c) i and ii
The following table shows the tests a student did on substance V and the conclusions made
Suggest the test and observation which led to the conclusion in test (d).
