Reactions Unit

Four students each prepare a cup of coffee. The students use similar amounts of brewed coffee, sugar, and cold milk. This table describes each student's method of dissolving the sugar in the coffee. Which student uses the method that will dissolve sugar in the coffee the fastest?

• Student 1

• Student 2

• Student 3

• Student 4

If we try to dissolve each type of sugar in 100 mL of water, why does the granulated sugar dissolve faster than the sugar cube?

• The granulated sugar has a greater surface area.

• The granulated sugar has less surface tension.

• The cube sugar will dissolve faster

• The granulated sugar has a greater surface tension

Which of the statements best explain his experiment?

• Stage 1 is saturated. Stage 2 is unsaturated. Stage 3 is supersaturated.

• Stage 1 is unsaturated. Stage 2 is saturated. Stage 3 is supersaturated.

• Stage 1 is supersaturated. Stage 2 is saturated. Stage 3 is unsaturated.

• Stage 1 is unsaturated. Stage 2 is supersaturated. Stage 3 is saturated.

What factors affect solubility (check all that apply)?

• temperature

• surface area

• agitation

• color

• odor

Which solution has the greatest number of hydroxide ions?

• Baking Soda (pH = 9)

• Milk (pH = 6)

• tomato juice (pH=3.5)

• Vinegar (pH = 2)

Which solution has the greatest number of Hydrogen (H+) ions?

• Baking Soda (pH = 9)

• Milk (pH = 6)

• tomato juice (pH=3.5)

• Vinegar (pH = 2)

The substance being dissolved in a solution.

• sands
• solute
• solvent
• alloy

If we are making Kool-aid with sugar, Kool-aid powder, and water, which part is the solvent?

• water
• powder
• sugar
• powder and sugar

In a sample of salt water, NaCl would be considered the ______.

• Solution
• Solute
• Solvent
• Solvation

Tags

NGSS.2-PS1-1

Human blood has a pH between 7.35 and 7.45. Which of the following best describes human blood?

• strongly acidic
• slightly acidic
• strongly basic
• slightly basic

Tags

NGSS.MS-PS1-2