Polarity & Electrolytes

Water is a molecule with slightly positive hydrogen atoms and a slightly negative oxygen atom. This unique arrangement gives water its —

• conductivity properties

• polarity

• electrolytic properties

• nonpolarity

Tags

NGSS.HS-PS1-3

Which one of the following statements is true?

• The salt solution conducts electricity.

• The sugar solution conducts electricity.

• The pure water conducts electricity.

Tags

NGSS.HS-PS1-3

Which statement is true?

• Solids will conduct electricity.

• Solutions (water with dissolved particles) will conduct electricity.

Which statement is true?

• Electrolytes dissociate (split up) in water.

• Nonelectrolytes dissociate (split up) in water.

Tags

NGSS.HS-ESS2-5

Any substance that does not conduct electricity when in solution is called a(n) ―

• electrolyte

• semiconductor

• nonconductor

• nonelectrolyte

Which of the following describes a solution containing an electrolyte?

• The solute particles are so firmly bonded that they do not break apart

• The solute particles permit the passage of an electric current

• It is unstable, and all the solute will precipitate if the solution is disturbed.

• It cannot contain any more solute particles

Which of the following best summarizes the figure below?

• HX is the only electrolyte

• Both HX and HZ are electrolytes, but HY is not.

• Only HY is an electrolyte

• All the solutions shown are electrolytes.

Tags

NGSS.HS-PS1-3

Which of the following statements describes a polar molecule? 

• because electrons are transferred between atoms, the molecule conducts electricity

• electrons are equally shared between atoms, giving them a negative charge

• molecule has unequal sharing of electrons, atoms have slightly positive or negative charge

• a polar molecule is perfectly symmetrical, electrons travel freely around atoms

Which statement about water (H₂O) is FALSE? 

• the hydrogen atoms have a partial positive charge

• the oxygen atom has a partial positive charge

• small creatures such as mosquitoes can walk on the surface of water due to its unique qualities

• charged ions can be attracted or repelled by water due to its polar nature

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-3

Which of the following best describes a nonelectrolyte?

• Solution where the solute completely dissociates

• Solution where the solute partially dissociates

• Solution where the solute does not dissociate

• Solute that does not dissolve in a solvent