Acids, Bases and Salts
Chemistry · 50 practice questions
General characteristics, properties and uses of acids, bases and salts; acid/base indicators; basicity of acids; normal, acidic, basic and double salts; an acid as a substance whose aqueous solution furnishes H₃O⁺ ions (proton donor); naturally occurring organic acids (ethanoic, citric, tartaric); alums as double salts; preparation of salts (neutralization, precipitation, action of acids on metals); oxides and trioxocarbonate(IV) salts; conductance of molar solutions of strong and weak acids/bases; pH and pOH scale and calculations; acid/base titrations; hydrolysis of salts (e.g. NH₄Cl, AlCl₃, Na₂CO₃, CH₃COONa).
- Distinguish between the properties of acids and bases.
- Identify different types of acids and bases and determine the basicity of acids.
- Differentiate acidity from alkalinity using indicators.
- Identify methods of preparing and classifying salts.
- Relate degree of dissociation to acid/base strength and to conductance.
- Perform pH and pOH calculations.
- Identify the appropriate acid-base indicator and interpret titration curves.
- Perform mole-concept calculations.
- Balance equations for salt hydrolysis and deduce the properties of the resultant solution.
Try a few questions
- Practice question 1
The basicity of trioxosulphate(VI) acid, H₂SO₄, is
- A.2
- B.1
- C.3
- D.4
Show the answer
A. 2
H₂SO₄ has two replaceable hydrogen ions, making it dibasic (basicity of 2).
- Practice question 2
General properties of acids mainly include
- A.turning blue litmus red, tasting sour, and reacting with reactive metals to release hydrogen
- B.turning red litmus blue and tasting bitter
- C.feeling soapy or slippery to the touch
- D.having no observable taste or effect on litmus paper
Show the answer
A. turning blue litmus red, tasting sour, and reacting with reactive metals to release hydrogen
These characteristic properties are commonly used to broadly identify acidic substances.
- Practice question 3
Litmus, as an acid-base indicator, generally turns
- A.blue in an acidic solution and red in an alkaline solution
- B.green in both acidic and alkaline solutions
- C.red in an acidic solution and blue in an alkaline (basic) solution
- D.colourless in both acidic and alkaline solutions
Show the answer
C. red in an acidic solution and blue in an alkaline (basic) solution
Litmus is a classic indicator distinguishing acids (red) from alkalis (blue).
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