Why does Naphthalene dissolves in benzene but not in water.

1.250 g of naphthalene was dissolved in 60 cm3 of benzene and freezing point of the solution was found to be 277.515 K while that of benzene 278.495 K. Density of benzene is 0.880 g cm^(-3) Kf = 5.1 K mol^(-1) kg. Calculate the molecular weight of naphthalene.

Solute when dissolved in water:

Why does adsorption occur?

0.440 g of a substance dissolved in 22.2 g of benzene lowered the freezing point of benzene by 0.567 ^(@)C . The molecular mass of the substance is _____ (K_(f) = 5.12 ^(@)C kg mol ^(-1))

Why does the platelet count decreases in dengue patient?

When common salt is dissolved in water

In activity 2, why does the coin become visible once the level of water reaches a certain height?

The boiling point of benzene is 353.23 K. When 1.809 of a non-volatile solute was dissolved in 90 g of benzene, the boiling point is raised to 354.11K. Calculate the molarmass of the solute. K_b for benzene is 2.53 K kg mol^(-1) .

Why does a needle have a sharp point ?

Naphthalene is volatile solid. It is best purified by