Exploring Chemical and Physical Properties in the Lab

What is the molarity of the hydrochloric acid used in the reaction with magnesium?

• 0.5 M

• 2.0 M

• 1.0 M

• 0.1 M

Tags

NGSS.HS-PS1-5

What physical sensation is felt when touching the test tube during the magnesium and hydrochloric acid reaction?

• It feels rough

• It feels neutral

• It feels warm

• It feels cold

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What color change is observed on the surface of zinc when it reacts with copper sulfate?

• It turns blue

• It turns brownish

• It turns green

• It turns white

Tags

NGSS.MS-PS1-2

What happens to the color of the copper sulfate solution when zinc is added?

• It becomes darker blue

• It becomes less blue

• It turns red

• It remains the same

Tags

NGSS.MS-PS1-2

What is the initial color of the 0.1 molar copper sulfate solution?

• Yellow

• Green

• Light blue

• Dark blue

What is observed when HCl is added to the 0.1 molar copper sulfate solution?

• Formation of precipitate

• Formation of bubbles

• Color change to red

• No significant change

Tags

NGSS.MS-PS1-2

What is observed when sodium bicarbonate is added to the 0.1 molar copper sulfate solution?

• Formation of white particulates

• No change

• Formation of bubbles

• Color change to red

Tags

NGSS.MS-PS1-2

What happens to the temperature of the solution when ammonium chloride is dissolved in water?

• It fluctuates

• It remains the same

• It gets colder

• It gets warmer

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

What indicates that the dissolution of ammonium chloride in water is a physical change?

• Formation of bubbles

• Color change

• Cooling effect

• Ability to recover ammonium chloride by evaporation

Tags

NGSS.MS-PS1-4

What is the appearance of the solution when ammonium chloride is dissolved in water?

• It turns blue

• It forms a precipitate

• It turns green

• It remains colorless