Reactivity of Alkaline Earth Metals

Why are certain elements more reactive than others?

• They have more protons in their nucleus.

• They have fewer electrons in their outer shell.

• They have a higher atomic mass.

• They are located in the middle of the periodic table.

Which of the following materials is used to test the reactivity of metals in water in the lab?

• Hydrochloric acid

• Distilled water

• Sodium sulfate

• Potassium iodate

What is the purpose of using sandpaper or a metal file in the experiment?

• To measure the weight of the metals

• To clean the metals by removing oxidation

• To cut the metals into smaller pieces

• To polish the metals for better appearance

In the experiment, which metal is added to tube A1?

• Magnesium

• Aluminum

• Calcium

• Barium

What is the initial concentration of hydrochloric acid used in the experiment?

• 0.1 M

• 0.2 M

• 0.5 M

• 1.0 M

Tags

NGSS.HS-PS1-5

Which of the following is a safety precaution mentioned for handling hydrochloric acid?

• Use a metal file

• Wear safety goggles

• Use a thermometer

• Use a black sheet of paper

What observation indicates a reaction has occurred in the test tubes?

• Change in color of the solution

• Formation of a precipitate

• Production of gas bubbles

• All of the above

Tags

NGSS.MS-PS1-2

Which alkaline earth metal solution is added to wells A3–C3 in the solubility experiment?

• Magnesium chloride

• Calcium chloride

• Strontium chloride

• Barium chloride

What does "PPT" stand for in the context of the solubility experiment?

• Precipitate

• Partial Pressure

• Potential

• Permeability

Which of the following is NOT a material used in the reactivity experiment?

• Aluminum foil

• Sodium carbonate

• Potassium iodate

• Strontium chloride

Tags

NGSS.MS-PS1-2