Home Homework Help

### Browse Homework Solutions

21,477 solutions

The Colligative Properties

#### Q. At 40oC, the vapor pressure of pure cyclohexane, (C6H12) is 185 torr, while the vapor pressure of pure toluene (C7H8) is 59 torr. What is the vapor pressure of a solution made by combining 50 grams of each of the liquids?

Solved • May 6, 2020

Equilibrium Expressions

#### Q. The equilibrium constant is 5.2 x 10-3 for the reaction Br2(g) <==> 2 Br(g) at 450K. Calculate the Kc and the Kp for the reaction 2 Br (g) <==> Br2(g) at that same temperature?

Solved • May 6, 2020

Mole Fraction

#### Q. A solution of isopropyl alcohol, C3H7OH, in water has a mole fraction of alcohol equal to 0.38. What is the weight per cent alcohol and the molality of the solution?

Solved • May 6, 2020

Arrhenius Equation

#### Q. Calculate the Energy of Activation for a reaction if the specific rate constant at 35oC is 3.2 x 10-5 sec-1 and the specific rate constant at 42oC is 5.9 x 10-5 sec-1

Solved • May 6, 2020

Molality

#### Q. Calculate the molality and mole fraction for a solution of 30% (w/W) hydrofluosilicic acid (H2SiF6) that has a density of 1.27

Solved • May 6, 2020

pH and pOH

#### Q. Determine the [H+], the [OH-] the pOH and the Ka for a solution of a weak acid with a concentration of 0.035 M has a pH of 3.52.

Solved • May 6, 2020

Limiting Reagent

#### Q. Aqueous hydrochloric acid will react with solid sodium hydroxide to produce aqueous sodium chloride and liquid water . Suppose 5.83 g of hydrochloric acid is mixed with 1.7 g of sodium hydroxide. Calculate the maximum mass of water that could be produced by the chemical reaction. Round your answer to significant digits.

Solved • May 6, 2020