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Question
Define the following term:
Efflorescence
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Solution
It is the phenomenon by which hydrated salts, on exposure to dry air, lose their water of crystallization and crumble to powder.
RELATED QUESTIONS
The property by which certain hydrated salts, when left exposed to the atmosphere, lose their water of crystallization and crumble into powder.
State one relevant observation for the following:
Anhydrous calcium chloride is exposed to air for some time.
The salt prepared by the method of direct combination is _______.
Write a balanced equation for the preparation of the following salts:
Copper sulphate from Copper Carbonate.
Write the chemical name and formula of common salt.
Give any two uses of common salt (sodium chloride).
Complete and balance the following chemical equations:
`NaCI (aq) + H_2O (l) `
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`NaCl + NH_3 + H_2O +CO_2`→
What is a salt?
The aqueous solution of one of the following salts will turn red litmus to blue. This salt is:
(a) potassium sulphate
(b) sodium sulphate
(c) sodium chloride
(d) potassium carbonate
A salt is dissolved in water and the pH of this salt solution is measured with a universal indicator paper. If the pH of solution is less than 7, the salt is most likely to be:
(a) CH3COONa
(b) Na2CO3
(c) KCl
(d) NH4Cl
P and Q are aqueous solutions of sodium chloride and sodium hydroxide, respectively. Which of these will turn:
red litmus blue?
Consider the following salts:
Na2CO3, NaCl, NH4Cl, CH3COONa, K2SO4, (NH4)2SO4
Which of these salts will give:
basic solutions (or alkaline solutions)?
Name the particles present in :
Strong electrolyte
Define the following term:
Hygroscopy
Define the following term:
Water of crystallization
Taking sodium carbonate as an example, give the meaning of the following terms:
Anhydrous
The acid reacts with a base to form a neutral product called ______.
Name the salt formed when sulphuric acid is added to sodium hydroxide and write its pH.
