Physical Chemistry Answers

1. Predict  How would the data in the diagram change if the pressure was 3 atm instead of 1 atm?

Suppose 100ml of a 0.2 M ZnCl2 solution is mixed with 300ml of 0.1 KNO3. What is the pH?

What is half-wave potential? How is it related to standard reduction potential

Suppose that you are travelling in the Space Shuttle Endeavor on a journey to Mars. The atmosphere (of the vehicle) consists of 20% oxygen and 80% helium by volume. It was noticed before take off from the Kennedy Space Center that there is a small leakage which if unchecked, would lead to a continual loss of gas at a rate of 0.05 atm/day through effusion. If the temperature in the space shuttle is maintained at 22°C and the volume of the vehicle is 15,000 liters. Calculate the amounts of helium and oxygen in grams that must be stored on a 5-day journey to allow for the leakage.

A vessel of volume 5 liters was filled with 2 moles of hydrogen gas (a), then a further

1 mole of chlorine gas (b), and then the mixture was sparked leading to the formation of 1 mole of HCI (g) (c). What are the partial pressure of the components

and the total pressure of the system at the final stage. The temperature being 25°C throughout.

Explain the process of steam distillation

A 74.8 g sample of a metal at 143.2 °C is added to an insulated vessel containing

208g of water at 24.8 °C. The final temperature of the mixture is 31.1 °C. What is

the specific heat of the metal in J/g-°C?

When potassium dichromate (K2CrO4) is added to a solution containing 0.500g silver nitrate (AgNO3) solid silver chromate (Ag2CrO4) is formed

"The smallest bone in the human body, which is in the ear, has a mass of 0.0030 g. what is the mass of this bone in pounds?"

A vessel of volume 5 liters was filled with 2 moles of hydrogen gas (a), then a further 1 mole of chlorine gas (b), and then the mixture was sparked leading to the formation of 1 mole of HCl (g) (c). What are the partial pressure of the components and the total pressure of the system at the final stage. The temperature being 25oC throughout.