When a solution is formed, which of the following results? There are 2 right answers! Choose them BOTH!

The solution has a higher boiling point than the solvent alone.

The solution has a lower freezing point than the solvent alone

The solution has a higher freezing point than the solvent alone.

The solution has a lower boiling point than the solvent alone.

Regents Chemistry Solutions

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1/12 Questions

The solvent is the part of the solution that
- Gets dissolved
- Does the dissolving
- Changes phase

About This Quiz

This quiz covers content of the New York State Regents Chemistry Curriculum.

2.

A solution that has the maximum amount of solid dissolved at a certain temperature is said to be:
- Unsaturated
- Saturated
- Supersaturated
Correct Answer

A. Saturated

Explanation

A solution that has the maximum amount of solid dissolved at a certain temperature is said to be saturated. This means that the solution has reached its maximum capacity to dissolve the solid and any additional solid added will not dissolve. The concentration of the dissolved solid is at its highest possible level in a saturated solution.

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1
3.

A solution that has some solid dissolved but could have more added to it is said to be:
- Unsaturated
- Saturated
- Supersaturated
Correct Answer

A. Unsaturated

Explanation

A solution that has some solid dissolved but could have more added to it is said to be unsaturated. This means that the solution has not reached its maximum capacity for dissolving solute, and more solute can be added without causing precipitation or saturation.

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2
4.

A solution made by dissolving the maximum amount of solid at a higher temperature and then cooling the mixture to a lower temperature is said to be:
- Unsaturated
- Saturated
- Supersaturated
Correct Answer

A. Supersaturated

Explanation

A solution made by dissolving the maximum amount of solid at a higher temperature and then cooling the mixture to a lower temperature is said to be supersaturated. This is because the solute is dissolved in excess at the higher temperature, and as the solution cools down, it becomes unable to hold all the solute particles. As a result, the excess solute precipitates out, creating a solution that is supersaturated with the solute.

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3
5.

According to table G, what is the maximum amount of KNO₃ that can be dissolved in 100 g H₂O at 60^oC?
- 50 g
- 110 g
- 115 g
- 85 g
Correct Answer

A. 110 g

Explanation

According to Table G, the solubility of KNO3 at 60°C is 110 g per 100 g of water. This means that at this temperature, 100 g of water can dissolve a maximum of 110 g of KNO3 before the solution becomes saturated.

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2
6.

As temperature increases, solubility of most solids
- Increases
- Decreases
- Remains the same
Correct Answer

A. Increases

Explanation

As temperature increases, the kinetic energy of the solvent molecules also increases. This increased kinetic energy allows the solvent molecules to move more quickly and collide with the solute particles more frequently and with greater force. This leads to the breaking of intermolecular forces between solute particles and the dissolution of the solute in the solvent. Therefore, the solubility of most solids tends to increase with increasing temperature.

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7.

As temperature increases, solubility of most gases
- Increases
- Decreases
- Remains the same
Correct Answer

A. Decreases

Explanation

As temperature increases, the solubility of most gases decreases. This is because an increase in temperature causes the gas particles to gain more kinetic energy, leading to increased movement and decreased attraction to the solvent molecules. As a result, the gas molecules are more likely to escape from the solvent, reducing the solubility.

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3
8.

According the reference table G, the amount of NH₃ that can be dissolved in 200g of water at 30^oC is
- 55g
- 110 g
- 27.5 g
- 200 g
Correct Answer

A. 110 g

Explanation

If you double the amount of water, you double the amount of solute that can be dissolved.

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2
9.

Which of the following salts is insoluble according to table F?
- NaNO3
- K3PO4
- Mg3PO4
- Ba(OH)2
Correct Answer

A. Mg3PO4

Explanation

According to table F, Mg3PO4 is insoluble.

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1
10.

In a molarity calculation, moles of solute are divided by:
- Grams of solvent
- Kilograms of solvent
- Liters of solvent
- Liters of solution
Correct Answer

A. Liters of solution

Explanation

In a molarity calculation, moles of solute are divided by liters of solution. This is because molarity is defined as the number of moles of solute per liter of solution. By dividing the moles of solute by the volume of the solution in liters, we can determine the concentration of the solute in the solution.

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2
11.

PPM is a way to measure concentration. It stands for:
- Particles per molarity
- Parts per million
- Parts per molarity
- Pandas please move
Correct Answer

A. Parts per million

Explanation

PPM stands for parts per million, which is a unit used to express the concentration of a substance in a solution. It represents the number of parts of a particular substance present in one million parts of the solution. This unit is commonly used in various fields such as environmental science, chemistry, and industry to measure the concentration of pollutants, chemicals, or impurities in a given sample.

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1
12.

When a solution is formed, which of the following results? There are 2 right answers! Choose them BOTH!
- The solution has a higher boiling point than the solvent alone.
- The solution has a higher freezing point than the solvent alone.
- The solution has a lower boiling point than the solvent alone.
- The solution has a lower freezing point than the solvent alone
Correct Answer(s)

A. The solution has a higher boiling point than the solvent alone.
A. The solution has a lower freezing point than the solvent alone

Explanation

When a solute is added to a solvent to form a solution, it disrupts the regular arrangement of solvent molecules, making it more difficult for the solvent to transition from a liquid to a gas phase. This leads to an increase in the boiling point of the solution compared to the boiling point of the pure solvent. On the other hand, the presence of the solute also interferes with the formation of solvent crystals during freezing, resulting in a lower freezing point for the solution compared to the freezing point of the pure solvent.

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2

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Regents Chemistry Solutions

The solvent is the part of the solution that

Quiz Preview

A solution that has the maximum amount of solid dissolved at a certain temperature is said to be:

A solution that has some solid dissolved but could have more added to it is said to be:

A solution made by dissolving the maximum amount of solid at a higher temperature and then cooling the mixture to a lower temperature is said to be:

According to table G, what is the maximum amount of KNO3 that can be dissolved in 100 g H2O at 60oC?

As temperature increases, solubility of most solids

As temperature increases, solubility of most gases

According the reference table G, the amount of NH3 that can be dissolved in 200g of water at 30oC is

Which of the following salts is insoluble according to table F?

In a molarity calculation, moles of solute are divided by:

PPM is a way to measure concentration. It stands for:

When a solution is formed, which of the following results? There are 2 right answers! Choose them BOTH!

According to table G, what is the maximum amount of KNO₃ that can be dissolved in 100 g H₂O at 60^oC?

According the reference table G, the amount of NH₃ that can be dissolved in 200g of water at 30^oC is