Exactly of solid NaOH is dissolved in water to prepare a total solution volume of . Calculate the no — Solutions and Colligative Properties Chemistry Question
Question
Exactly $2\text{ g}$ of solid NaOH is dissolved in water to prepare a total solution volume of $100\text{ cm}^3$. Calculate the normality ($N$) of the resulting solution. (Molar mass of NaOH = $40\text{ g/mol}$)
Answer: 0.5
💡 Solution & Explanation
For NaOH, the basicity (n-factor) is 1, meaning Equivalent Mass = Molar Mass = $40\text{ g/eq}$. Volume of solution = $100\text{ cm}^3 = 0.1\text{ L}$. Normality $N = \frac{\text{Mass}}{\text{Eq. Mass} \times V(\text{in L})} = \frac{2}{40 \times 0.1} = \frac{2}{4} = 0.5\text{ N}$.
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