Explain the following terms with suitable example: (i) Molarity (… - Vidyadip

Question

Explain the following terms with suitable example:
(i) Molarity
(ii) Molality

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Answer

(i) Molarity (M) : It is the number of mole of solute dissolved per litre of solution. For example, 58.5 g NaCl when dissolved in one litre of water gives 1 M solution.
(ii) Molality (m) : It is the number of moles of solute dissolved in 1 kg of solvent. For example, 40 g of NaOH when dissolved in 1 kg of water it will give 1 molal solution.

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