AKS 6 Remediation

A student dissolves sugar in water. In this solution, which term correctly identifies the sugar and the water?

• Sugar is the solvent; water is the solute

• Sugar is the solute; water is the solvent

• Sugar is the mixture; water is the compound

• Sugar is the solvent; water is the compound

Tags

GSE.SPS6.a

A student tests several household liquids with litmus paper. Vinegar turns blue litmus paper red, while baking soda solution turns red litmus paper blue. Which conclusion best describes these substances?

• Vinegar is basic and baking soda solution is acidic

• Vinegar is neutral and baking soda solution is basic

• Vinegar is acidic and baking soda solution is basic

• Both vinegar and baking soda solution are neutral

Tags

GSE.SPS6.e

A student is dissolving salt in water and wants to speed up the process. Which combination of factors would most effectively increase the rate at which the salt dissolves?

• Decrease temperature and use large salt crystals

• Increase temperature, crush the salt into smaller pieces, and stir the solution

• Decrease temperature and stir the solution

• Increase temperature and use large salt crystals without stirring

Tags

GSE.SPS6.b

• As temperature increases, solubility decreases

• Temperature has no effect on solubility

• As temperature increases, solubility increases

Tags

GSE.SPS6.c

Which of the following correctly describes the pH scale and how it relates to acids and bases?

• A pH of 7 is acidic, below 7 is basic, and above 7 is neutral

• A pH below 7 is acidic, a pH of 7 is neutral, and a pH above 7 is basic

• A pH above 7 is acidic, a pH of 7 is neutral, and a pH below 7 is basic

• The pH scale only measures the strength of acids, not bases

Tags

GSE.SPS6.d

• Solution A is more concentrated because it has less salt

• Solution B is more concentrated because it has more solute dissolved in the same volume of solvent

• Both solutions have the same concentration because they use the same solvent

• Concentration cannot be determined without knowing the temperature

Tags

GSE.SPS6.a

A student tests common household substances using red cabbage juice as an indicator. Lemon juice turns the indicator red, milk turns it purple, and bleach turns it green. Based on this data, how should these substances be classified?

• Lemon juice is basic, milk is neutral, and bleach is acidic

• Lemon juice is acidic, milk is neutral, and bleach is basic

• Lemon juice is neutral, milk is acidic, and bleach is basic

• All three substances are neutral because they are household items

Tags

GSE.SPS6.e

• The aspirin molecules remain completely intact and conduct electricity as whole molecules

• The water molecules break apart and release electrons that carry the current

• The aspirin partially ionizes in water, releasing a small number of charged particles that allow limited electrical conduction

• Conductivity in this solution is caused solely by the temperature of the water

Tags

GSE.SPS6.a

A student investigates how surface area affects the rate of dissolving by placing whole sugar cubes and crushed sugar into separate beakers of water at the same temperature without stirring. She records the time it takes for each to fully dissolve. What pattern would she most likely detect, and what scientific reasoning explains this pattern?

• The whole sugar cube dissolves faster because it has more mass concentrated in one area

• The crushed sugar dissolves faster because breaking the sugar into smaller pieces increases the surface area exposed to the solvent, allowing more solute-solvent interactions to occur simultaneously

• Both dissolve at the same rate because the amount of sugar is the same

• The crushed sugar dissolves slower because the smaller pieces are harder for water molecules to surround

Tags

GSE.SPS6.b

Tags

GSE.SPS6.c