Unit 8 - Chemical Solutions Test

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  • 1/31 Questions

    The ocean is a solution because it is a mixture of salts and water.

    • True
    • False
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About This Quiz

Chemical solutions are homogenous mixtures composed of two or more substances. This usually involves a solute being dissolved into another. Think you know all there is to know about chemical solutions? Try your hand at this scientific quiz!

Unit 8 - Chemical Solutions Test - Quiz

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  • 2. 

    The air that you breathe is an example of a(n) ____.

    • Gas

    • Solid

    • Liquid

    • Amalgam

    Correct Answer
    A. Gas
    Explanation
    The air that you breathe consists of a mixture of gases such as nitrogen, oxygen, carbon dioxide, and others. It is not a solid or a liquid because it does not have a fixed shape or volume. Therefore, the correct answer is gas.

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  • 3. 

    An alloy is a solid solution.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    An alloy is a solid solution because it is a mixture of two or more metals or a metal and a non-metal. In an alloy, the atoms of the different elements are uniformly distributed throughout the solid, forming a single phase. This results in the properties of the alloy being different from those of the individual elements, making it a solid solution.

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  • 4. 

    Because grease is nonpolar, it cannot be dissolved in water.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Grease is a nonpolar substance, meaning it lacks a charge and does not have the ability to form hydrogen bonds with water molecules. Since water is a polar solvent, it can only dissolve polar substances. Therefore, grease cannot be dissolved in water, making the statement true.

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  • 5. 

    A substance that does not conduct an electric current when it forms a solution is a(n) _____.

    • Electrolyte

    • Nonelectrolyte

    • Polar substance

    • Salt

    Correct Answer
    A. Nonelectrolyte
    Explanation
    A substance that does not conduct an electric current when it forms a solution is called a nonelectrolyte. This means that when the substance dissolves in a solution, it does not produce ions that can carry an electric charge. Unlike electrolytes, which do conduct electricity due to the presence of ions, nonelectrolytes do not dissociate into ions and therefore do not allow for the flow of electric current.

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  • 6. 

    Adding a solute to a solvent raises the boiling point of a solvent.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    When a solute is added to a solvent, it disrupts the attractive forces between the solvent molecules, making it harder for them to escape into the gas phase. As a result, more heat energy is required to raise the temperature of the solution to its boiling point. Therefore, adding a solute to a solvent increases the boiling point of the solvent.

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  • 7. 

    In a solution, the substance that is being dissolved is the _____.

    • Solute

    • Solvent

    • Liquid

    • Gas

    Correct Answer
    A. Solute
    Explanation
    In a solution, the solute is the substance that is being dissolved. The solute is typically present in a smaller quantity compared to the solvent. The solvent is the substance in which the solute is dissolved. In this case, the correct answer is solute because it accurately identifies the substance that is being dissolved in a solution.

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  • 8. 

    An alloy is an example of a _____ solution.

    • Gaseous

    • Liquid

    • Solid

    • Dilute

    Correct Answer
    A. Solid
    Explanation
    An alloy is an example of a solid solution because it is a mixture of two or more metals or a metal and a non-metal that is solid at room temperature. In an alloy, the atoms of the different elements are evenly distributed throughout the solid, forming a homogeneous mixture. This is in contrast to gaseous or liquid solutions, where the particles are not held together in a solid structure. Dilute refers to the concentration of a solution, so it is not the correct answer in this context.

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  • 9. 

    A substance that produces ions in water is a nonelectrolyte.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    electrolyte

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  • 10. 

    A solution that contains all of the solute it can normally hold at a given temperature is _____.

    • Dilute

    • Unsaturated

    • Supersaturated

    • Saturated

    Correct Answer
    A. Saturated
    Explanation
    A solution that contains all of the solute it can normally hold at a given temperature is saturated. This means that the solution is at its maximum capacity to dissolve the solute, and any additional solute added will not dissolve and will instead form a precipitate.

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  • 11. 

    Which of the the following types of solutes dissolves well in water?

    • Hydrocarbons

    • Polar molecules

    • Nonpolar molecules

    • Oil

    Correct Answer
    A. Polar molecules
    Explanation
    Polar molecules dissolve well in water because water is a polar molecule itself. Polar molecules have a slightly positive and negative charge distribution, which allows them to interact with the positive and negative charges on water molecules. This interaction leads to the formation of hydrogen bonds between the polar solute and water molecules, resulting in the solute dissolving in water. In contrast, hydrocarbons and nonpolar molecules do not have a charge distribution and cannot form hydrogen bonds with water, making them insoluble in water. Oil, which is composed of nonpolar molecules, is also insoluble in water for the same reason.

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  • 12. 

    Which of the following will speed up the dissolving of a solid solute in water?

    • Stir the solution

    • Cool the solution

    • Grind up the solvent

    • Freeze the solute

    Correct Answer
    A. Stir the solution
    Explanation
    Stirring the solution will speed up the dissolving of a solid solute in water because it increases the contact between the solute particles and the solvent molecules. This allows for a more efficient and faster mixing process, resulting in a quicker dissolution of the solute.

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  • 13. 

    The maximum amount of a solute that can be dissolved in a given amount of solvent is its ______.

    • Concentration

    • Density

    • Solubility

    • Dilution

    Correct Answer
    A. Solubility
    Explanation
    Solubility refers to the maximum amount of a solute that can be dissolved in a given amount of solvent. It is a measure of how well a solute can dissolve in a solvent. Concentration, on the other hand, refers to the amount of solute present in a given amount of solution. Density is the mass per unit volume of a substance. Dilution is the process of reducing the concentration of a solute in a solution by adding more solvent. Therefore, solubility is the correct answer in this context.

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  • 14. 

    Soap has a(n) ______ end that will dissolve in water and has a long hydrocarbon proton that will dissolve in oily dirt.

    • Ethanol

    • Dry

    • Toxic

    • Ionic

    Correct Answer
    A. Ionic
    Explanation
    Soap has an ionic end that will dissolve in water and a long hydrocarbon proton that will dissolve in oily dirt. This is because soap molecules are made up of a polar, hydrophilic (water-loving) head and a nonpolar, hydrophobic (water-fearing) tail. The ionic end of soap is attracted to water molecules, allowing it to dissolve in water. The hydrocarbon tail is attracted to oily substances, allowing it to dissolve in oily dirt. This property of soap makes it effective in removing dirt and oil from surfaces.

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  • 15. 

    A gas dissolves in a liquid most rapidly when under low pressure.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    high

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  • 16. 

    Adding antifreeze to a car radiator increases the boiling point of the water in the radiator.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Adding antifreeze to a car radiator increases the boiling point of the water in the radiator. Antifreeze contains chemicals, such as ethylene glycol, that raise the boiling point of the liquid in the radiator. This is important because it helps prevent the water from boiling and evaporating at high temperatures, which can lead to engine overheating and damage. By increasing the boiling point, antifreeze allows the engine to operate at higher temperatures without the risk of coolant loss or overheating.

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  • 17. 

    A general statement that describes which substances dissolve which is "like dissolves unlike."

    • True

    • False

    Correct Answer
    A. False
    Explanation
    like

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  • 18. 

    The concentration of a solution that contains a large amount of solute in the solvent could be described as _____.

    • Unsaturated

    • Polar

    • Concentrated

    • Dilute

    Correct Answer
    A. Concentrated
    Explanation
    A solution that contains a large amount of solute in the solvent can be described as concentrated. This means that there is a high proportion of solute particles compared to the amount of solvent present. The concentration is high, indicating a strong presence of the solute in the solution.

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  • 19. 

    Adding more solute to a solvent _____.

    • Raises its freezing point

    • Lowers its boiling point

    • Raises its boiling point

    • Does not affect its boiling point

    Correct Answer
    A. Raises its boiling point
    Explanation
    When more solute is added to a solvent, it increases the boiling point of the solution. This is because the presence of solute particles disrupts the intermolecular forces between solvent molecules, making it harder for them to escape into the vapor phase. As a result, the solution requires a higher temperature to reach its boiling point compared to the pure solvent.

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  • 20. 

    Adding a solute to a solvent raises the freezing point of the solvent.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    It lowers the freezing point.

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  • 21. 

    In soda pop, the solvent would be the _____.

    • Water

    • Carbon dioxide

    • Sugar

    • Flavoring

    Correct Answer
    A. Water
    Explanation
    In soda pop, the solvent refers to the substance that dissolves the other components. In this case, water is the most common solvent used in soda pop. It dissolves the sugar, flavoring, and other ingredients to create the drink. Carbon dioxide, on the other hand, is the gas that gives soda its fizziness and is not considered the solvent.

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  • 22. 

    The process by which the particles in a crystal are separated and drawn into solution by water is called _____.

    • Ionization

    • Dissociation

    • Polarity

    • Saturation

    Correct Answer
    A. Dissociation
    Explanation
    Dissociation refers to the process where the particles in a crystal separate and dissolve in water. When a crystal is added to water, the water molecules surround the crystal particles and pull them apart, resulting in the formation of individual ions. This process is commonly observed with ionic compounds, where the positive and negative ions dissociate and become surrounded by water molecules. Therefore, dissociation is the correct term to describe the separation of crystal particles in water.

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  • 23. 

    Increasing the surface area of a solid _____.

    • Slows the speed of dissolving

    • Has no effect on the speed of dissolving

    • Increases the speed of dissolving

    • Causes the solid to ionize

    Correct Answer
    A. Increases the speed of dissolving
    Explanation
    Increasing the surface area of a solid increases the speed of dissolving because it exposes more surface area of the solid to the solvent. This allows for more solvent molecules to come into contact with the solid, leading to a faster dissolution process. The increased surface area provides more sites for solvent-solute interactions, facilitating the breaking down of the solid into individual particles and enhancing the rate at which the solid dissolves.

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  • 24. 

    A molecule with a positive and negative area is ___.

    • Polar

    • Nonpolar

    • Ionic

    • Radioactive

    Correct Answer
    A. Polar
    Explanation
    A molecule with a positive and negative area is considered polar. Polar molecules have an uneven distribution of charge, with one side being more positive and the other side being more negative. This occurs when there is a difference in electronegativity between the atoms in the molecule, causing the electrons to be pulled towards one side more than the other.

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  • 25. 

    Which of the following combination would increase the solubility of a gas in a liquid?

    • Increase the pressure and decrease the temperature

    • Increase the pressure and temperature

    • Decrease the pressure and temperature

    • Decrease the pressure and increase the temperature

    Correct Answer
    A. Increase the pressure and decrease the temperature
    Explanation
    Increasing the pressure and decreasing the temperature would increase the solubility of a gas in a liquid. This is because according to Henry's law, the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid. By increasing the pressure, more gas molecules are forced into the liquid, increasing its solubility. Additionally, decreasing the temperature also increases the solubility of gases in liquids, as lower temperatures reduce the kinetic energy of the gas molecules, allowing them to be more easily trapped and dissolved in the liquid.

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  • 26. 

    The solubility of gas in a liquid occurs faster if the liquid is ______.

    • Heated

    • Cold

    • Under low pressure

    • An electrolyte

    Correct Answer
    A. Cold
    Explanation
    The solubility of gas in a liquid occurs faster if the liquid is cold. This is because at lower temperatures, the molecules of the liquid have less kinetic energy, causing them to move slower and be closer together. This allows the gas molecules to interact more easily with the liquid molecules and dissolve faster. On the other hand, heating the liquid increases the kinetic energy of the molecules, causing them to move faster and become more spaced out, which reduces the solubility of the gas.

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  • 27. 

    Which of the following would dissolve in iodine?

    • Water

    • Ethanol

    • Polar solvent

    • Vinegar

    Correct Answer
    A. Ethanol
    Explanation
    Ethanol would dissolve in iodine because both substances are polar. Polar substances have a positive and negative end, which allows them to form intermolecular bonds with other polar substances. Iodine is also polar, so it can form bonds with ethanol molecules, causing it to dissolve. Water, vinegar, and polar solvent may also dissolve in iodine because they are also polar substances. However, the question specifically asks for one substance, and ethanol is the only option that is a specific substance.

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  • 28. 

    What is the first step of the dissolving process?

    • The molecules of the solvent pull the molecules of the solute into solution.

    • The molecules of the solute pull the molecules of the solvent into solution.

    • The moving molecules of the solvent spread the molecules of the solute equally throughout the solution.

    • The moving molecules of the solvent surround the molecules of the solute.

    Correct Answer
    A. The moving molecules of the solvent surround the molecules of the solute.
    Explanation
    The first step of the dissolving process is when the moving molecules of the solvent surround the molecules of the solute. This occurs because the solvent molecules are in constant motion and collide with the solute molecules, causing them to become surrounded and dispersed throughout the solution. This process is known as solvation or hydration, depending on whether the solvent is a liquid or water.

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  • 29. 

    Water is sometimes referred to as the universal solvent because _____.

    • It has no separated positive and negative areas

    • It is a small molecule and can fit easily among the molecules of many solutes

    • It has a polar and nonpolar end

    • Its molecules can slip easily among molecules of a nonpolar solvent

    Correct Answer
    A. It is a small molecule and can fit easily among the molecules of many solutes
    Explanation
    Water is sometimes referred to as the universal solvent because it is a small molecule and can fit easily among the molecules of many solutes. This means that water has the ability to dissolve a wide range of substances, making it an effective solvent for many chemical reactions and biological processes. Due to its small size, water molecules can surround and interact with solute molecules, breaking them apart and forming new bonds. This property of water allows it to dissolve and transport nutrients, minerals, and other substances in living organisms.

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  • 30. 

    One commonly used precise way to describe concentrations of solutions is to state _____.

    • That the solution is dilute or concentrated

    • The percentage by area of the solute

    • The percentage by volume of the solute

    • The percentage by volume of the solvent

    Correct Answer
    A. The percentage by volume of the solute
    Explanation
    One commonly used precise way to describe concentrations of solutions is to state the percentage by volume of the solute. This measurement indicates the proportion of the solution that is made up of the solute, providing a clear indication of its concentration. It is a widely accepted method for expressing concentration and allows for easy comparison between different solutions.

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  • 31. 

    The process called dissociation separates ionic crystals into ions.

    • True

    • False

    Correct Answer
    A. False
    Explanation
    ionization

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  • Mar 22, 2023
    Quiz Edited by
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  • Jan 10, 2013
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