How Substances Dissolve: Checking For Understanding Flash Quiz

12 Questions | Total Attempts: 227

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 How Substances Dissolve: Checking For Understanding Flash Quiz

How Substances Dissolve: Flash Quiz


Questions and Answers
  • 1. 
    A general rule in chemistry is that "like dissolves like".  This rule means that_______________
    • A. 

      A general rule in chemistry is that "like dissolves like". This rule means that a solvent will dissolve substances that have similar molecular structures.

    • B. 

      A general rule in chemistry is that "like dissolves like". This rule means that a solvent cannot dissolve substances that have a similar molecular structure.

    • C. 

      A general rule in chemistry is that "like dissolves like". This rule means that a solute will dissolve particles that have a similar molecular structure.

    • D. 

      A general rule in chemistry is that "like dissolves like". This rule means that a solvent will dissolve substances that are covalently bonded.

  • 2. 
    In order to dissolve a substance, solvent particles must be able to __________________
    • A. 

      In order to dissolve a substance, solvent particles must be able to attract solute particles more strongly than the solute particles attract one another.

    • B. 

      In order to dissolve a substance, solvent particles must be able to covalently and ionically bond with one another.

    • C. 

      In order to dissolve a substance, solute particles must be able to attract each other strongly to form a solution.

    • D. 

      In order to dissolve a substance, solvent particles must be soluble causing the solvent to dissolve.

  • 3. 
    Why do some ionic compounds like silver chloride (AgCl) not dissolve in water while others do?
    • A. 

      Some ionic compounds dissolve in water and others do not because attractions between ions in the crystal are stronger than those between the ions and water molecules. So the water cannot pull the ions apart.

    • B. 

      Some covalent compounds dissolve in water and others do not because attractions between ions in the crystal are stronger than those between the ions and water molecules. So the water cannot pull the ions apart.

    • C. 

      Some ionic compounds dissolve in water and others do not because attractions between atoms in the crystal are stronger than those between the atoms and water molecules. So the water cannot pull the ions apart.

    • D. 

      Some ionic compounds dissolve in water and others do not because attractions between ions in the covalent bond are stronger than those between the ions and water molecules. So the water cannot pull the ions apart.

  • 4. 
    What do these symbols​ mean?     or  
    • A. 

      These symbols​ mean that the atom has either a slight (partial) positive or negative charge.

    • B. 

      These symbols​ mean that the molecule has either a slight (partial) positive or negative charge.

    • C. 

      These symbols​ mean that the atom has a positive or negative electronegativity.

    • D. 

      These symbols​ mean that the atom is polar.

  • 5. 
    When a molecular compound dissolves, do the molecules break apart?
    • A. 

      When a molecular compound dissolves, the molecules move toward the water molecules and away from one another, the individual molecules do not break apart.

    • B. 

      When a molecular compound dissolves, the molecules separate and re-bond individually forming Hydrogen bonds.

    • C. 

      When a molecular compound dissolves, the molecules move toward the Hydrogen and the individual molecules break apart.

    • D. 

      When a molecular compound dissolves, the molecules separate and are distributed evenly over the whole water molecule.

  • 6. 
    What is a nonpolar molecule?
    • A. 

      A nonpolar molecule's electrons are evenly distributed over the whole molecule so it does not have partial charges. Without the partial polar charges, most nonpolar compounds do not dissolve in polar compounds. Nonpolar compounds are insoluble in polar compounds.

    • B. 

      A nonpolar molecule's electrons are transferred causing it to have no partial charges.Without the partial polar charges, most nonpolar compounds do not dissolve in polar compounds. Nonpolar compounds are insoluble in polar compounds.

    • C. 

      A nonpolar molecule's electrons bond with polar molecules and are soluble in polar compounds.

    • D. 

      A nonpolar molecule's protons are evenly distributed over the whole molecule so it does not have partial charges. Without the partial polar charges, most nonpolar compounds do not dissolve in polar compounds. Nonpolar compounds are insoluble in polar compounds.

  • 7. 
    Why is energy needed to dissolve a solute?
    • A. 

      Energy is needed to dissolve a solute to break the attractions between particals of solute.

    • B. 

      Energy is needed to dissolve a solute to form covalent bonds between particals of solute.

    • C. 

      Energy is needed to dissolve a solute to ionically transfer particals of solute.

    • D. 

      Energy is needed to dissolve a solute to limit the attractions between particals of solute.

  • 8. 
    How does increase in surface area help a solute dissolve more quickly?
    • A. 

      Increase in surface area helps a solute to touch more of the solvent. As a result, there are more collisions between solute particles and solvent particles dissolving quicker and more efficiently.

    • B. 

      Increase in surface area helps a solute to consolidate more of the solvent. As a result, there are less collisions between solute particles and solvent particles dissolving quicker and more efficiently.

    • C. 

      Increase in surface area helps a solvent to touch more of the solution. As a result, there are more collisions between solvent particles and solution, dissolving quicker and more efficiently.

    • D. 

      Increase in surface area helps a particle join more of the solvent. As a result, there are more particles between the solute and solvent, dissolving quicker and more efficiently.

  • 9. 
    How does an increase in temperature help a solute dissolve?
    • A. 

      An increase in temperature helps a solute dissolve by causing its particles to move more quickly. This causes the particles to collide more frequently. At higher temperatures, the collisions among particles transfer more energy. More energy breaks bonds between solute particles more easily.

    • B. 

      An increase in temperature helps a solute dissolve by causing its particles to solidify more quickly. This causes the particles to adhere more frequently. At higher temperatures, the adhesion among particles transfer more energy. More energy breaks bonds between solute particles more easily.

    • C. 

      An increase in temperature helps a solute dissolve by causing its particles to transfer more quickly. This causes the particles to transfer more frequently. At higher temperatures, the transfer among particles build-up more energy. More energy solidifies the bonds between solute particles more easily.

    • D. 

      It does not. A decrease in temperature helps a solute dissolve by causing its particles to move more slowly and therefore more solidly combine, dissolving the particles more efficiently.

  • 10. 
    How does stirring or shaking a solution allow more contact between solvent and solute particles?
    • A. 

      Stirring or shaking moves the dissolved solute particles away from the rest of the solute. Then more solvent can reach the solute that has not dissolved.

    • B. 

      Stirring or shaking moves the dissolved solute particles toward the rest of the solute. Then more solvent can reach the solute that has not dissolved.

    • C. 

      Stirring or shaking moves the dissolved solute particles outside of the rest of the solute. Then the solvent can move into the solute that has not dissolved.

    • D. 

      Stirring or shaking eliminates the solute particles from the rest of the solute. Then more solvent can dissolve the remaining solute.

  • 11. 
    How can a solute affect a solutions physical properties?
    • A. 

      A solute can change the physical properties of the pure solvent. One way a solute can affect a solution's physical property is to change its response to temperature: freezing or melting point.

    • B. 

      A solute cannot really change the physical properties of the pure solvent. One way a solute may affect a solution's physical property is to change its boiling and cooling point.

    • C. 

      A solute can change the physical properties of Hydrogen bonded solvents. One way a solute can affect a Hydrogen bonded solution's physical property is to change its crystal formation.

    • D. 

      A solute can change the physical, chemical and behavioral properties of the pure solvent. One way a solute can affect a solution's properties is to change its crystalization points.

  • 12. 
    Select the ones you like
    • A. 

      Option1

    • B. 

      Option2

    • C. 

      Option3

    • D. 

      Option4

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