Conductivity of solutions

Which of the following substances would conduct electricity if dissolved in water to form a solution?

• C₆H₁₂O₆

• CH₄

• KI

• CO₂

Tags

NGSS.MS-PS1-2

A conductivity tester is placed in a solution of water and an unknown solute. The bulb doesn't light up. What can you determine about the unknown solute?

• It is an ionic compound.

• It is a metallic compound.

• It is a covalent compound.

• Not enough information is given to answer this question.

Tags

NGSS.HS-PS1-1

Which solution will have a higher conductivity?

• Left one, since it is concentrated

• Right one, since it is concentrated

• Left one, since it is diluted

• Right one since it diluted.

Tags

NGSS.MS-PS1-2

Which of the following will conduct electricity when dissolved to make a solution?

• KCl

• NH₃

• CO₂

• C₁₂H₂₂O₁₁

Tags

NGSS.MS-PS1-2

A light bulb connected to two electrodes is immersed in the following solutions. Which one will make the light bulb light up the brightest?

• 1 g of sugar in 1 cup of water

• 1 g of salt in 1 cup of water

• 10 g of salt in 1 cup of water

• 10 g of sugar in 1 cup of water.

Tags

NGSS.MS-PS2-3

When the amount of solute increases, the concentration and conductivity _________. (One word)

Which of the following will produce ions to conduct electricity when dissolved in water?

• CaCl₂

• NH₃

• CH₄

• P₂O₅

Tags

NGSS.MS-PS1-2

What can you conclude based on the diagram? There could be more than one correct answer.

• Liquid A a concentrated ionic solution

• Liquid B is a concentrated ionic solution

• Liquid A is a concentrated covalent solution.

• Liquid B is a concentrated covalent solution.

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

A beaker of uncovered salt water is left in the lab. What happens to the conductivity after a week?

• The conductivity decreases since the concentration decreases as the water evaporates

• The conductivity increases, since the concentration decreases as the water evaporates.

• The conductivity decreases, since the concentration increases as the water evaporates.

• The conductivity increases, since the concentration increases as the water evaporates.

What happens to the concentration and conductivity, when you increase the amount of solvent in a solution?

• The concentration increases and conductivity increases.

• The concentration increases and the conductivity decreases.

• The concentration decreases and the conductivity decreases.

• The concentration decreases and the conductivity increases.