Question 2 (1 point)

Which of the following statements about water is incorrect?

Question 2 options:

	Amphiphilic detergents often form micelles with the polar groups on the outside exposed to water (solvent) and the nonpolar groups sequestered in the interior.
	All ionic compounds are soluble in water
	Pure water has a concentration of approximately 55.5 M.
	Water is an excellent solvent for polar molecules.
	Cations are solvated by shells of water molecules oriented with their hydrogen atoms pointed away from the ions.

Question 7 (1 point)

Which of the following solutes is exceptionally soluble in water due to the formation of hydrogen bonds.

Question 7 options:

	O2
	Glucose
	Hexane
	NaCl

Question 8 (1 point)

If a buffer is made with the pH below the pK_a of the weak acid, the ratio of [base]/[acid] will be:

Question 8 options:

	< 1
	> 1
	< 0
	cannot be determined based on the information given
	= 1

Question 9 (1 point)

Which pairs of phosphate compounds would make a buffer close to pH =7?

Question 9 options:

	H3PO4 and H2PO4-
	H2PO4- and PO43-
	H3PO4 and PO43-
	HPO42- and PO43-
	H2PO4- and HPO42-

Question 10 (1 point)

When looking at a titration curve, the point on the curve at which the pH equals the pKa of the weak acid is

Question 10 options:

	in the place where the curve plateaus.
	in the place where the curve rises steeply.