Consider 1.60 g of naphthalene (C10H8) is dissolved in 20.0 g of benzene. The freezing point of benzene is 5.5oC, and the freezing point of the mixture is 2.8oC. What is the molal freezing point constant for benzene?
Consider 1.60 g of naphthalene (C10H8) is dissolved in 20.0 g of
benzene. The freezing point of benzene is 5.5oC, and the freezing point of the
mixture is 2.8oC. What is the molal freezing point constant for benzene?
Consider 1.60 g of naphthalene (C10H8) is dissolved in 20.0 g of
benzene. The freezing point of benzene is 5.5oC, and the freezing point of the
mixture is 2.8oC. What is the molal freezing point constant for benzene?
1 Answer
Your experimental molal freezing point depression constant for benzene is
Explanation:
The formula for calculating freezing point depression is
#color(blue)(|bar(ul(color(white)(a/a) ΔT_"f" = K_fm color(white)(a/a)|)))" "#
where
We can rearrange the above formula to get
#K_"f" = (ΔT_"f")/m#
The actual value of
Are you sure that the observed freezing point wasn't 2.3 °C?