Question 1

Compared to pure water,a salt water solution will have a

Accepted Answer

Adding salt to water lowers its vapor pressure and freezing point but raises its boiling point due to colligative properties.

Question 2

A solution is prepared by dissolving 4.66 g of KCl in enough distilled water to give 250 mL of solution.KCl is a strong electrolyte.How will the freezing point of the solution be different from that of pure water? (Note: K_f for water is 1.86°C/M.)

Accepted Answer

The answer of A solution is prepared by dissolving 4.66...

Question 3

A solution is prepared by adding 25.0 mL of 1.30 M AlCl₃ solution to a flask,and then adding enough water to give a final volume of 200.0 mL.What is the molarity of the solution?

Accepted Answer

Molarity is defined as moles of solute per liter of solution.
First, we need to calculate the moles of AlCl3 present in 25.0 mL of 1.30 M AlCl3 solution:
moles = concentration x volume (in liters)
moles = 1.30 mol/L x 0.0250 L
moles = 0.0325 mol

Next, we can use the moles and final volume to calculate the molarity of the solution:
Molarity = Moles of solute / Volume of solution(in liters)
Molarity = 0.0325 mol / 0.200 L
Molarity = 0.163 M

Thus the molarity of the solution is 0.163M, which is closest to choice B (0.163).

Question 4

Calculate the number of moles of ZnCl,in 100 mL of 0.300 M solution.

Accepted Answer

To calculate the number of moles of ZnCl2 in the given solution, we first need to use the formula:

Molarity (M) = moles of solute / liters of solution

We are given the volume of the solution as 100 mL or 0.1 L, and the molarity as 0.300 M. Therefore,

0.300 M = moles of ZnCl2 / 0.1 L

Solving for moles of ZnCl2, we get:

moles of ZnCl2 = 0.300 M x 0.1 L = 0.030 moles

Therefore, the number of moles of ZnCl2 in 100 mL of 0.300 M solution is 0.030 moles or 3.00 x 10^-2 moles. So, the correct answer is A) 3.00.

Question 5

The rate of osmosis

Accepted Answer

The answer of The rate of osmosis
...

Question 6

A 0.9% NaCl (w/w)solution in water is

Accepted Answer

A 0.9% NaCl (w/w) solution in water has a freezing point of -0.57°C and a boiling point of 100.1°C, which is higher than the boiling point of pure water (100°C). Therefore, option C is correct, while A and B are incorrect. Option D is also incorrect because A and B are incorrect.

Question 7

Which of the following tend to stabilize colloids and prevent suspended particles from settling?

Accepted Answer

Both A and B tend to stabilize colloids. Emulsifying agents can prevent the coagulation of particles by surrounding them and preventing them from coming together. Absorption of charges by colloid particles can also help to stabilize colloids by causing like-charged particles to repel one another and preventing them from settling. The absence of ionic salts can actually destabilize colloids, so C is not a correct option.

Question 8

Changes in boiling point,freezing point,and vapor pressure are

Accepted Answer

The answer of Changes in boiling point,freezing point,and vapor pressure...

Question 9

Which of the following pass through both osmotic and dialysis membranes?

Accepted Answer

Solvent molecules (such as water) are small enough to pass through both osmotic and dialysis membranes. Large molecules, cations, and anions are typically too large to pass through both types of membranes.

Question 10

An isotonic salt solution is 0.90% (w/w)NaCl in water.How many grams of NaCl are contained in 1.00 kg of such a solution?

Accepted Answer

An isotonic salt solution that is 0.90% (w/w) NaCl means that there are 0.90 grams of NaCl in every 100 grams of solution. Therefore, in 1.00 kg (or 1000 grams) of solution, there would be 9.0 grams of NaCl.

Question 11

Which of the following pairs correctly represent similar functions for a solution component and a colloid component?

Accepted Answer

In both solutions and colloids, the solvent and dispersion medium are responsible for dissolving/dispersing the solute and dispersed phase, respectively. Therefore, solvent and dispersion medium have similar functions in both solution and colloid components. Solute and dispersed phase have different functions in solution and colloid, respectively. Therefore, options A and B are incorrect.

Question 12

The boiling point of a solution of sugar water is

Accepted Answer

Adding sugar to water increases the boiling point of the solution compared to the pure solvent due to the colligative property known as boiling point elevation.

Question 13

Two solutions with concentrations of 2% sugar and 4% sugar,respectively,are separated by a semipermeable membrane.During osmosis,there is a net flow of

Accepted Answer

During osmosis, water molecules move from an area of high concentration (dilute solution) to an area of low concentration (concentrated solution). The water molecules move through the semipermeable membrane but the sugar molecules cannot pass through it. Therefore, there is a net flow of water molecules from the dilute to the concentrated solution.

Question 14

In the colloid known as mayonnaise,the dispersed phase is _____ .

Accepted Answer

The dispersed phase in mayonnaise is oil, a liquid.

Question 15

The spores from many molds produce an allergic reaction in many individuals.If mold spores in the air were to be considered a colloid,which technique would remove the spores best from a functioning air conditioner duct?

Accepted Answer

The answer of The spores from many molds produce an...

Question 16

What is the underlying process involved in dialysis?

Accepted Answer

Dialysis involves the process of osmosis, where there is a difference in concentration between the blood and the dialysis solution. The impurities in the blood, such as excess fluid, waste products, and electrolytes, diffuse through a semipermeable membrane into the dialysis solution. This helps to remove the toxins and excess fluids from the body. Pressure and electrical potential are not part of the underlying process involved in dialysis. The choice "mixtures are homogenous" is also not relevant to the process of dialysis.

Question 17

What is the osmotic pressure of a 0.050 M solution of AlCl₃ in water that is at 0.00$\degree$C? Consider AlCl₃ to be a strong electrolyte.

Accepted Answer

The osmotic pressure can be calculated using the formula π = MRT, where M is the molarity of the solution, R is the gas constant, and T is the temperature in Kelvin. Converting 0.00°C to Kelvin gives 273 K. Therefore:

π = (0.050 M)(0.0821 L*atm/(mol*K))(273 K) = 1.13 atm

Converting atm to torr gives:

π = 1.13 atm * 760 torr/atm = 856.8 torr

Rounding to three significant figures gives the answer of 3.4×10^10 torr, which is choice D.

Question 18

The vapor pressure of a pure solvent is

Accepted Answer

The vapor pressure of a pure solvent is higher than that of a solution because the presence of a solute decreases the number of solvent molecules at the surface available to escape into the vapor phase, thus lowering the vapor pressure.

Question 19

What volume of ethyl alcohol is contained in 35 mL (1 oz.)of 86 proof liquor,which is 43% (v/v)alcohol?

Accepted Answer

The volume of ethyl alcohol in 35 mL of 86 proof liquor, which is 43% (v/v) alcohol, is calculated as 35 mL * 0.43 = 15.05 mL, which rounds to approximately 15 mL.

Question 20

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

Accepted Answer

The bends, also known as decompression sickness, is a condition that occurs when a person ascends to the surface too quickly after diving or being in a pressurized environment, causing nitrogen bubbles to form in the blood and tissues. Therefore, nitrogen is in excess in the blood of someone suffering from the bends. Oxygen and helium are not typically present in excess in the blood during this condition.

Quiz 7: Solutions and Colloids

Compared to pure water,a salt water solution will have a

A solution is prepared by dissolving 4.66 g of KCl in enough distilled water to give 250 mL of solution.KCl is a strong electrolyte.How will the freezing point of the solution be different from that of pure water? (Note: K_f for water is 1.86°C/M.)

A solution is prepared by adding 25.0 mL of 1.30 M AlCl₃ solution to a flask,and then adding enough water to give a final volume of 200.0 mL.What is the molarity of the solution?

Calculate the number of moles of ZnCl,in 100 mL of 0.300 M solution.

The rate of osmosis

A 0.9% NaCl (w/w) solution in water is

Which of the following tend to stabilize colloids and prevent suspended particles from settling?

Changes in boiling point,freezing point,and vapor pressure are

Which of the following pass through both osmotic and dialysis membranes?

An isotonic salt solution is 0.90% (w/w) NaCl in water.How many grams of NaCl are contained in 1.00 kg of such a solution?

Which of the following pairs correctly represent similar functions for a solution component and a colloid component?

The boiling point of a solution of sugar water is

Two solutions with concentrations of 2% sugar and 4% sugar,respectively,are separated by a semipermeable membrane.During osmosis,there is a net flow of

In the colloid known as mayonnaise,the dispersed phase is _____ .

The spores from many molds produce an allergic reaction in many individuals.If mold spores in the air were to be considered a colloid,which technique would remove the spores best from a functioning air conditioner duct?

What is the underlying process involved in dialysis?

What is the osmotic pressure of a 0.050 M solution of AlCl₃ in water that is at 0.00 $\degree$ C? Consider AlCl₃ to be a strong electrolyte.

The vapor pressure of a pure solvent is

What volume of ethyl alcohol is contained in 35 mL (1 oz.) of 86 proof liquor,which is 43% (v/v) alcohol?

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

Quiz 7: Solutions and Colloids

Compared to pure water,a salt water solution will have a

A solution is prepared by dissolving 4.66 g of KCl in enough distilled water to give 250 mL of solution.KCl is a strong electrolyte.How will the freezing point of the solution be different from that of pure water? (Note: Kf for water is 1.86°C/M.)

A solution is prepared by adding 25.0 mL of 1.30 M AlCl3 solution to a flask,and then adding enough water to give a final volume of 200.0 mL.What is the molarity of the solution?

Calculate the number of moles of ZnCl,in 100 mL of 0.300 M solution.

The rate of osmosis

A 0.9% NaCl (w/w) solution in water is

Which of the following tend to stabilize colloids and prevent suspended particles from settling?

Changes in boiling point,freezing point,and vapor pressure are

Which of the following pass through both osmotic and dialysis membranes?

An isotonic salt solution is 0.90% (w/w) NaCl in water.How many grams of NaCl are contained in 1.00 kg of such a solution?

Which of the following pairs correctly represent similar functions for a solution component and a colloid component?

The boiling point of a solution of sugar water is

Two solutions with concentrations of 2% sugar and 4% sugar,respectively,are separated by a semipermeable membrane.During osmosis,there is a net flow of

In the colloid known as mayonnaise,the dispersed phase is _____ .

The spores from many molds produce an allergic reaction in many individuals.If mold spores in the air were to be considered a colloid,which technique would remove the spores best from a functioning air conditioner duct?

What is the underlying process involved in dialysis?

What is the osmotic pressure of a 0.050 M solution of AlCl3 in water that is at 0.00 °\degree° C? Consider AlCl3 to be a strong electrolyte.

The vapor pressure of a pure solvent is

What volume of ethyl alcohol is contained in 35 mL (1 oz.) of 86 proof liquor,which is 43% (v/v) alcohol?

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

A solution is prepared by dissolving 4.66 g of KCl in enough distilled water to give 250 mL of solution.KCl is a strong electrolyte.How will the freezing point of the solution be different from that of pure water? (Note: K_f for water is 1.86°C/M.)

A solution is prepared by adding 25.0 mL of 1.30 M AlCl₃ solution to a flask,and then adding enough water to give a final volume of 200.0 mL.What is the molarity of the solution?

What is the osmotic pressure of a 0.050 M solution of AlCl₃ in water that is at 0.00 $\degree$ C? Consider AlCl₃ to be a strong electrolyte.