1) Suppose you want to cook pasta in boiling, salty water. What is effect of salt (NaCl) addition to water on the boiling point temperature of the resulting solution? Justify your answer by calculating the changes in the vapor pressure of pure water vs. salty water at 100 °C. Assume you add 100.0 g of salt to 1.00 liter (1000 mL) of water. Vapor pressure of pure water is 760 mmHg. Assume density of water as 1 g/mL.

(2) Suppose you have the following reaction: CH3CH2Br + NaI -------> (acetone) CH3CH2I + NaBr

How does the reaction rate change (increases, decreases or does not change) if you:

(a) increase the concentration of sodium iodide twice

(b) use ethyl chloride as a substrate instead of ethyl bromide

(c) use n-hexane as a solvent instead of acetone

(d) use isopropyl bromide as a substrate instead of ethyl bromide

(e) use two times higher volume of acetone (keeping the amount of both alkyl bromide and sodium iodide the same)

In each case give one sentence of justification for your prediction.