Posted: February 16th, 2020
Environmental Chemistry Assignment
1. EXTRA CREDIT QUESTION (+5 points) Pepsin is the principal digestive enzyme of gastric juice. A 3-milligram sample of pepsin is dissolved in enough water to make the 10-milliliter solution. The osmotic pressure of the solution is 0.162 torr at 25°C. Calculate the molar mass of pepsin.
2. What is fractional distillation? (p. 589)
3. How many boiling-condensation stages it would take to collect 0.8:0.2 mixture of benzene : toluene if you start with 0.1:0.9 mixture? (p. 590). Vapor Liquid Stage 1 Normal boiling point Stage 2 85 80+ Toluene 0 .20 0. 400 .60 Mole traction of benzene Wenz)
Colligative properties (McQuarrie General Chemistry, p. 569)
1. Calculate mole fractions of a solution prepared by dissolving 5.25 grams of KMnO3 in 250.0 grams of water. SHOW YOUR WORK.
2. What is a colligative molality (effective molality)? WRITE THE EQUATION AND EXPLAIN WHAT EACH SYMBOL MEANS (p. 572).
3. Calculate the colligative molality of a solution made by dissolving 8 grams of AgNO3 in 500 grams of water.
4. State the Raoult’s law. WRITE THE EQUATION AND EXPLAIN WHAT EACH SYMBOL MEANS (p. 574). Get Chemistry Help Today