Acids, Bases and Salts

Topics in this chapter

• Acid and Base Properties
• Indicators, pH and Strength
• Neutralisation and Everyday Uses
• Ions, Solutions and Electrolysis
• Salt Formation and Properties
• Common Salt and Its Products
• Water of Crystallisation and Gypsum

Cheat sheet

Practice questions

1. Question 1Q-A066FB

   Which of the following phenomena usually occurs when a strong acid is diluted?

   1. A.Ionization and dilution only
   2. B.Neutralization and dilution only
   3. C.Formation of hydronium ions, followed by absorption of heat
   4. D.Formation of hydronium ions, accompanied by release of heat
   See the answer and solution
2. Question 2Q-331BC3

   State the chemical property due to which aqueous solutions of acids conduct electricity, whereas solutions of compounds like glucose and alcohol do not.

   See the answer and solution
3. Question 3Q-72AAE5

   What is observed when a few drops of phenolphthalein are added to a dilute solution of sodium hydroxide, followed by the dropwise addition of dilute hydrochloric acid until the mixture becomes colorless?

   1. A.The solution turns pink initially and remains pink throughout.
   2. B.The solution turns pink initially and becomes colorless when sufficient acid is added.
   3. C.The solution remains colorless throughout the process.
   4. D.The solution turns yellow when acid is added.
   See the answer and solution
4. Question 4Q-838797

   Tooth decay starts when the pH of the mouth falls below a certain value. Name this critical pH value and explain how it causes tooth enamel damage.

   See the answer and solution
5. Question 5Q-BBD3D1

   Which of the following salts does not contain water of crystallization?

   1. A.Blue vitriol
   2. B.Washing soda
   3. C.Common salt
   4. D.Gypsum
   See the answer and solution