Exam 16: Mixtures

Read carefully. Twice as much as one million trillion is two million trillion. One thousand times as much is 1000 million trillion. One million times as much is 1,000,000 million trillion, which is the same as one trillion trillion. Thus, one trillion trillion is a million times greater than a million trillion. Got that? So how many more water molecules than impurity molecules are there in a glass of water that is 99.9999 percent pure?

How does a suspension differ from a solution?

Treating water with chlorine or ozone during water purification is an example of ________.

What can be said about drinking water that is 99.9999 percent free of some poison, such as a pesticide?

Which of the above would best describe how soap behaves in water?

Fish don't live very long in water that has just been boiled and brought back to room temperature. Suggest why.

Which of the following accurately describes osmosis?

Phosphate ions, PO₄^3-, were once added to detergents to assist in cleaning. What function did they serve?

Passing arsenic contaminated water through a long pipe filled with sand and iron powder leads to removal of the arsenic by ________.

Someone argues that he or she doesn't drink tap water because it contains thousands of molecules of some impurity in each glass. How would you respond in defense of the water's purity, if it indeed does contain thousands of molecules of some impurity per glass?

Which of the following describes the term concentration?

Which of the following might have the best solubility in water?

From the schematic above: why do nonpolar molecules have a difficult time passing through the bilipid layer?

The following image represents which kind of matter?

How necessary is soap for removing salt from your hands?

Why is secondary treatment often needed for sewage?

Which of the following solutions is the most concentrated?

Fatty acid molecules can also align to form a bilipid layer that extends in 3-dimensions. Shown below is a cross section of this structure. What is this structure called? (Hint: it forms the basis of all life)

How many molecules of sucrose are in 0.5 L of a 2 molar solution of sucrose?

If nitrogen, N₂, were pumped into your lungs at high pressure, what would happen to its solubility in your blood stream?