Define
(i) Mole fraction
(ii) Molality
(iii) Raoult's law
(b) Assuming complete dissociation, calculate the expected freezing point of a solution prepared by dissolving 6.00 g of Glauber's salt, `Na_(2)SO_(4).10 H_(2)O` in 0.100 kg of water. (`K_(f)` for water =`1.86 K kg "mol"^(-1)`, Atomic massess : Na=23, S=32, O=16 , H=1)

Explanation

### Step-by-Step Solution

#### Part (i): Define Mole Fraction
Mole fraction (χ) is defined as the ratio of the number of moles of a specific component to the total number of moles of all components in a mixture. It is given by the formula:

\[ \text{Mole Fraction} (\chi) = \frac{\text{Number of moles of component}}{\text{Total number of moles of all components}} \]
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