PS Chemistry Midterm Review

According to the scale, which of these substances is the strongest base?

• NaOH

• HCl

• Bleach

• Lemon Juice

The molecules of a substance are moving rapidly in a container. The molecules do not interact with each other. If the container is opened, the molecules will escape from the container. In what phase of matter are the molecules in the container?

• plasma

• gas

• liquid

• solid

Tags

NGSS.MS-PS1-4

The elements from this section of the periodic table all belong to the same

• Family

• Group

• Period

• Valence

Which of the following allows a solute to dissolve faster? Check all that apply.

• Crushing the cube increases surface area

• Stirring the cube will dissolve it faster

• Adding hot water will dissolve it faster

• Adding cold water will dissolve it faster

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Which one of the following is CORRECT about a solution?

• Solvent is the stuff and solute is the liquid

• Solvent is the liquid and solute is the stuff

• There is more solute than solvent in a solution

• All solutions are supersaturated

Which state of matter has the greatest distance between the individual particles?

• A

• B

• C

• all are the same

Tags

NGSS.MS-PS1-4

Based on the solubility chart, which of the listed salts is the most soluble at 25 °C?

• potassium iodide

• sodium chloride

• potassium nitrate

• potassium chlorate

Tags

NGSS.MS-PS1-2

Based on the solubility chart, the smiley face and sodium nitrate would represent what type of solution?

• supersaturated

• saturated

• unsaturated

• all of the above

Tags

NGSS.MS-PS1-2

Based on the solubility chart, at what temperature will 100 grams of potassium nitrate dissolve?

• 65 degrees celsius

• 25 degrees celsius

• 56 degrees celsius

• 62 degrees celsius

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

One radioactive isotope of calcium has an atomic mass of 47. How many neutrons are in this calcium-47 nucleus?

• 17

• 20

• 27

• 47

Tags

NGSS.MS-PS1-1