questions on acids and bases
Answers
An acid is a substance that donates protons (in the Brønsted-Lowry definition) or accepts a pair of valence electrons to form a bond (in the Lewis definition).
A base is a substance that can accept protons or donate a pair of valence electrons to form a bond. Bases can be thought of as the chemical opposite of acids.
1.Name the acid present in the following:
(i) Tomato (ii) Vinegar (iii) Tamarind
Answer. (i) Oxalic acid (ii) Acetic acid (iii) Tartaric acid
2.15 mL of water and 10 mL of sulphuric acid are to be mixed in a beaker
(i) State the method that should be followed with reason.
(ii)What is this process called?
Answer.
(i) The acid is to be added slowly in water to prevent the mixture to be splashed. The
reaction is highly exothermic, therefore, constant cooling should be done.
(ii)The process is called dilution.
10.Name the natural source of each of the following acid
(i) Citric acid. (ii)Oxalic acid.
(iii)Lactic acid. (iv)Tartaric acid.
Answer.
(i) Lemon and orange.(ii)Tomatoes and Guava.
(iii)Sour milk (curd).(iv)Tamarind.
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