Question 1

During a surgical procedure, a wound was accidentally irrigated with deionized water, instead of normal saline.  What would one expect to happen?
A)There would be a net movement of water into the exposed tissue.
B)Water would move out of the exposed tissue.
C)Sodium ions would migrate out of the exposed cells.
D)There would be no net effect since the solution was added externally.

Accepted Answer

The answer of During a surgical procedure, a wound was...

Question 2

Which of the following correctly arranges 1.00 M solutions of the strong electrolytes in order of increasing boiling point (lowest to highest)?
A) 
B) 
C) 
D)All have the same boiling point.

Accepted Answer

The answer of Which of the following correctly arranges 1.00...

Question 3

The primary intermolecular attractions between CH₃-OH and H₂O are A)hydrogen bonds. B)dispersion forces. C)covalent bonds. D)dipolar forces.

Accepted Answer

Hydrogen bonds are the primary intermolecular attractions between molecules containing -OH (hydroxyl) groups, such as CH3OH and H2O, because they have hydrogen directly bonded to a highly electronegative atom (oxygen), allowing for hydrogen bonding.

Question 4

One test to determine if a mixture is a true solution or a colloid is ____.
A)physical state of the mixture
B)boiling point elevation
C)light scattering
D)color

Accepted Answer

Light scattering, also known as the Tyndall effect, is a test to determine if a mixture is a true solution or a colloid. True solutions do not scatter light, whereas colloids scatter light due to the larger size of their particles.

Question 5

Express the following concentration of solution in terms of molarity: 3.00 L of solution contains 1.75 mol of solute.
A)5.25 M
B)0.583 M
C)1.71 M
D)too little information to know

Accepted Answer

Molarity is calculated as moles of solute divided by liters of solution, so $ \frac{1.75 \, \text{mol}}{3.00 \, \text{L}} = 0.583 \, M $.

Question 6

You discover that your roommate has left a half-full bottle of cola on the kitchen counter without replacing the cap - AGAIN!. Not surprisingly, the cola is now flat (all carbonation is gone).  Why did this happen?
A)The solubility of the carbon dioxide gas in the cola has decreased due to it being left at a lower pressure.
B)Warm bottles of cola will lose their carbonation faster than cold ones, even if the lid had been left on.
C)Oxygen in the atmosphere reacts with the cola, eliminating the carbonation.
D)The solubility of the carbon dioxide gas diffuses through the wall of the bottle.

Accepted Answer

The solubility of carbon dioxide gas decreases when the pressure is lowered, such as when the cap is left off, allowing the gas to escape and the cola to go flat.

Question 7

Which of the following is not considered a colligative property?
A)vapor pressure
B)boiling point
C)conductivity
D)freezing point

Accepted Answer

The answer of Which of the following is not considered...

Question 8

When making some iced tea, you find that you can dissolve 100 grams of table sugar in a liter of tea at 20 ^oC. Based on this, what did you learn? A)Based on the solubility, tea must be a nonpolar solvent. B)The solubility of table sugar in tea at 20 ^oC is 100 g\L C)Table sugar must be a strong electrolyte. D)You can dissolved 100 grams of sugar in tea at 20 ^oC

Accepted Answer

The answer of When making some iced tea, you find...

Question 9

You have a patient who is suffering from the "bends".  What gas is in excess in the blood?
A)nitrogen
B)oxygen
C)helium
D)all of these

Accepted Answer

The "bends," also known as decompression sickness, occurs when nitrogen gas, which is dissolved in the blood and tissues under high pressure, forms bubbles as pressure decreases too quickly.

Question 10

A solution is prepared at 75 °C by dissolving 50.0 g of A  in 100 g of water.  When this solution is cooled to 15 °C what happens based on the following solubility plot for A. 
A)Solid A crystallizes and the solution is unsaturated.
B)Solid A dissolves and the solution is supersaturated.
C)Solid A crystallizes and the solution is saturated.
D)Solid A dissolves and the solution is unsaturated.

Accepted Answer

The answer of A solution is prepared at 75 °C...

Question 11

The cleaning action of soaps and detergents is attributable to
A)their ionic character.
B)the long hydrocarbon tail in their structure.
C)their ability to dissociate into ions.
D)all of these

Accepted Answer

Soaps and detergents clean by acting as emulsifiers which allow oil and water to mix, thanks to their ionic character, the long hydrocarbon tail that interacts with oily dirt, and their ability to dissociate into ions in water, making them effective in removing dirt and grease.

Question 12

A solution is prepared at 75 °C by dissolving 50.0 g of A  in 100 g of water.  Which of the following correctly classifies this solution based on the solubility chart for A given below? 
A)saturated
B)unsaturated
C)supersaturated
D)immiscible

Accepted Answer

The answer of A solution is prepared at 75 °C...

Question 13

Which of the following would be considered a strong electrolyte?
A)salt
B)sugar
C)acetic acid
D)all of the choices

Accepted Answer

Salt is considered a strong electrolyte because it dissociates completely into ions when dissolved in water, allowing it to conduct electricity efficiently.

Question 14

When sodium acetate dissolves in water, the following reaction occurs. 
This solution could be used
A)in a hot pack.
B)in a cold pack.
C)either a hot pack or cold pack.
D)neither a hot pack or cold pack.

Accepted Answer

The answer of When sodium acetate dissolves in water, the...

Question 15

Citric acid, a natural food preservative, accounts for the tartness of citrus fruits.  It is shown below.  About 730 g of this material can be dissolved in water, making a liter of solution.  However, only about 1.5% of it dissociates.  As such, it would be considered a _____. 
A)nonelectrolyte
B)strong electrolyte
C)pseudoelectrolyte
D)weak electrolyte

Accepted Answer

The answer of Citric acid, a natural food preservative, accounts...

Question 16

The ability to see the scattering of light when passed through a colloid is known as
A)the dispersing effect.
B)a scattering ratio.
C)an emulsifying agent.
D)the Tyndall effect.

Accepted Answer

The Tyndall effect is the phenomenon where light is scattered by particles in a colloid or in a very fine suspension, making the light beam visible.

Question 17

Drinking water can be purified by which of the following methods?
A)reverse osmosis
B)distillation
C)ion exchange
D)all of the choices

Accepted Answer

All the mentioned methods, reverse osmosis, distillation, and ion exchange, are effective techniques for purifying drinking water. Each method targets different contaminants and impurities, making them collectively comprehensive for water purification.

Question 18

An ion in solution that is surrounded by water is a(n)____ ion.
A)hydrated
B)osmotic
C)saturated
D)colloid

Accepted Answer

A hydrated ion is one that is surrounded by water molecules in solution. This occurs due to the polar nature of water, which allows it to interact with and stabilize ions.

Question 19

When a patient's blood electrolyte levels are evaluated, sodium, chloride and bicarbonate ions are commonly measured and the difference in the total positive and negative charges calculated. This difference is called the
A)ionic ratio.
B)isoelectric point.
C)electromotive constant.
D)anion gap.

Accepted Answer

The anion gap is the difference between the primary positively charged ions (cations) and the primary negatively charged ions (anions) in the blood. It is used to help identify the causes of metabolic acidosis.

Question 20

A colligative property
A)will only occur for aqueous solutions.
B)depends only on the number of species added to a solution.
C)results from increasing vapor pressure as a solute is added to a solvent.
D)All of the choices.

Accepted Answer

Colligative properties depend only on the number of solute particles in a solution, not on the nature of the solute particles.

Quiz 7: Solutions and Colloids

During a surgical procedure, a wound was accidentally irrigated with deionized water, instead of normal saline. What would one expect to happen?

Which of the following correctly arranges 1.00 M solutions of the strong electrolytes in order of increasing boiling point (lowest to highest) ?

The primary intermolecular attractions between CH₃-OH and H₂O are

One test to determine if a mixture is a true solution or a colloid is ____.

Express the following concentration of solution in terms of molarity: 3.00 L of solution contains 1.75 mol of solute.

You discover that your roommate has left a half-full bottle of cola on the kitchen counter without replacing the cap - AGAIN!. Not surprisingly, the cola is now flat (all carbonation is gone) . Why did this happen?

Which of the following is not considered a colligative property?

When making some iced tea, you find that you can dissolve 100 grams of table sugar in a liter of tea at 20 ^oC. Based on this, what did you learn?

You have a patient who is suffering from the "bends". What gas is in excess in the blood?

A solution is prepared at 75 °C by dissolving 50.0 g of A in 100 g of water. When this solution is cooled to 15 °C what happens based on the following solubility plot for A.

The cleaning action of soaps and detergents is attributable to

A solution is prepared at 75 °C by dissolving 50.0 g of A in 100 g of water. Which of the following correctly classifies this solution based on the solubility chart for A given below?

Which of the following would be considered a strong electrolyte?

When sodium acetate dissolves in water, the following reaction occurs. This solution could be used

Citric acid, a natural food preservative, accounts for the tartness of citrus fruits. It is shown below. About 730 g of this material can be dissolved in water, making a liter of solution. However, only about 1.5% of it dissociates. As such, it would be considered a _____.

The ability to see the scattering of light when passed through a colloid is known as

Drinking water can be purified by which of the following methods?

An ion in solution that is surrounded by water is a(n) ____ ion.

When a patient's blood electrolyte levels are evaluated, sodium, chloride and bicarbonate ions are commonly measured and the difference in the total positive and negative charges calculated. This difference is called the

A colligative property