A Solid Substance Was Tested in the Laboratory

Which diagram best illustrates the ion-molecule attractions that occur when the ions of NaCl(s) are added to water?

• 1

• 2

• 3

• 4

Tags

NGSS.HS-PS1-3

NGSS.HS-PS2-4

As water is added to a 0.10 M NaCl aqueous solution, the conductivity of the resulting solution

• decreases because the concentration of ions decreases

• decreases, but the concentration of ions remains the same

• increases because the concentration of ions decreases

• increases, but the concentration of ions remains the same

A solid substance was tested in the laboratory. The test results are listed below.

• dissolves in water

• is an electrolyte

• melts at a high temperature

Based on these results, the solid substance could be

• Cu

• CuBr₂

• C

• C₆H₁₂O₆

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-3

Based on Reference Table F, which of these salts is the best electrolyte?

• sodium nitrate

• magnesium carbonate

• silver chloride

• barium sulfate

A substance that conducts an electrical current when dissolved in water is called

• catalyst

• metalloid

• electrolyte

• nonelectrolyte

What happens when BaF_2(s) is dissolved in water?

• F^- ions are attracted to the oxygen atoms of the water

• F^- ions are attracted to the hydrogen atoms of the water

• Ba²⁺ ions are attracted to the hydrogen atoms of the water

• No attractions are involved, the crystal just falls apart

Tags

NGSS.HS-PS1-3

NGSS.HS-PS2-4

What happens when C₁₂H₂₂O_11(s) is dissolved in water?

• O^-2 ions are attracted to the oxygen atoms of the water

• O^-2 ions are attracted to the hydrogen atoms of the water

• H⁺ ions are attracted to the hydrogen atoms of the water

• No attractions are involved, the crystal just falls apart

Tags

NGSS.HS-ESS2-5

• hydrogen bond formation

• metallic bonding

• dipole-dipole interactions

• molecule-ion attractions

Tags

NGSS.HS-PS1-3

NGSS.HS-PS2-4

Which of the following solutes will result in a solution with the strongest conductivity?

• 1.0 M C₆H₁₂O₆

• 1.0 M MgBr₂

• 2.0 M NaCl

• 2.0 M CaF₂

Tags

NGSS.HS-PS1-5

Which of the following is not an electrolyte?

• KBr

• LiOH

• RbNO₃

• CH₄