Water and Aqueous Solutuons

Question 1

What is the most important property of water to support life?

Answer 1

Reactant and medium

Question 2

Even though H-bonding occurs in ammonia and ethanol, they cannot be used to replace water in living cells because ___________________.

Answer 2

Ammonia and Ethanol aren’t as great of a solvent as water

Question 3

How many grams of fat would be found in 1 gallon (3700 ml) of 2% milk?

Answer 3

74

Question 4

When the pH of a Northern Lake, changed from 7 to 5 due to acid rain, the H+ ion concentration would _____________(increase or decrease) by _________ fold.

Answer 4

Increase by 2

Question 5

Which of the following compounds would have the greatest number of molecules in a sample of 100 grams each?

Note: Atomic mass of H = 1, C = 12 and O = 16.

A. CH4
B. CO2
C. CH3OH
D. C2H5OH
E. C6H12O6

Answer 5

A. CH4

Question 6

How many grams NaOH (MW = 40) is needed to make a 500 ml of 200mM solution?

Answer 6

4

40MW x .2 Moles x .5ml =4g