Q: Which of the following is a correct expression for the solubility of a compound?

$$\frac{\text{grams of solute}}{100\ \text{g water}}$$

Question 1

A laboratory technician needs to prepare 3.00 L of a 0.200 M NaOH solution from a stock solution of 1.00 M NaOH. What volume (in liters) of the stock solution should be used?

Accepted Answer

$$0.600\ \mathrm{L}$$

Question 2

Which of the following best describes the process of osmosis?

Accepted Answer

The movement of water molecules from a region of lower solute concentration to a region of higher solute concentration through a semipermeable membrane.

Question 3

A red blood cell is placed in a 0.90% NaCl solution. What will happen to the cell?

Accepted Answer

The cell will remain the same size because the solution is isotonic.

Question 4

Which of the following solutions is saturated with respect to ammonia ($$\mathrm{NH_3$}) at 25$^\circC$$, given that the solubility is $$21.5\ \mathrm{g}/100\ \mathrm{g}$$ water?

Accepted Answer

A solution containing $$40\ \mathrm{g}$$ $$\mathrm{NH_3$} in$$ $$150\ \mathrm{g}$$ water

Question 5

Which of the following is a correct expression for the solubility of a compound?

Accepted Answer

$$\frac{	ext{grams of solute}}{100\ 	ext{g water}}$$

Question 6

A cucumber is placed in a pickling solution with a high concentration of salt and vinegar. What process causes the cucumber to shrink?

Accepted Answer

Water flows out of the cucumber due to osmosis because the pickling solution is hypertonic.

Question 7

Which of the following is a property of hydrocarbons?

Accepted Answer

They are generally non-polar and not soluble in water.

Question 8

What is the general formula for a straight-chain alkane?

Accepted Answer

$$\mathrm{C}_n\mathrm{H}_{2n+2}$$

Question 9

An alkane used as a motor lubricant contains 10 carbon atoms. How many hydrogen atoms are present in its structure?

Accepted Answer

22

Question 10

Which of the following is an example of an inorganic compound?

Accepted Answer

Sodium chloride, $$\mathrm{NaCl}$$

Question 11

A red blood cell is placed in a hypotonic solution. What is the most likely outcome?

Accepted Answer

The cell will swell and may burst due to water entering the cell.

Question 12

Which of the following best describes an isotonic solution with respect to red blood cells?

Accepted Answer

It exerts the same osmotic pressure as body fluids, so red blood cells retain their normal volume.

Question 13

Which of the following is a saturated hydrocarbon?

Accepted Answer

An alkane

Question 14

Which of the following statements about the physical properties of hydrocarbons is correct?

Accepted Answer

As the molecular weight increases, the boiling point and density increase.

Question 15

Which of the following best explains why red blood cells must be in an isotonic solution?

Accepted Answer

To maintain an equal flow of water between the cell and its environment, preventing swelling or shrinking.

Question 16

Which of the following is the correct molecular formula for an alkane with 5 carbon atoms?

Accepted Answer

$$\mathrm{C}_5\mathrm{H}_{12}$$

Question 17

Which of the following is a typical property of an organic compound?

Accepted Answer

It is not soluble in water.

Question 18

A solution contains $$15\ \mathrm{g} of$$ $$\mathrm{NH_3$} in$$ $$50\ \mathrm{g} of $$water at $$25^\circC. Is $$this solution saturated or unsaturated, given the solubility of $$\mathrm{NH_3$} is$$ $$21.5\ \mathrm{g}/100\ \mathrm{g}$$ water?

Accepted Answer

Saturated

Question 19

Which of the following best describes the effect of placing a red blood cell in a hypertonic solution?

Accepted Answer

The cell will shrink (crenate) as water leaves the cell.

General Chemistry Study Notes: Solutions, Solubility, Osmosis, and Introduction to Organic Chemistry

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