Q)
What mass of NaCl must be dissolved in 65.0 g of water to lower the freezing point of water by 7.50$^{\large\circ}$C? The freezing point depression constant ($K_f$) for water is 1.86$^{\large\circ}$C/m. Assume Vant Hoff factor for NaCl is 1.87 (Molar mass of NaCl = $58.5 g mol^{−1}$).
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