What is pH used for?

• defining acid strength

• measuring the amount of coral reef death

• defining acid concentration

How are hydrogen ions related to acid strength and pH?

• The more hydrogen ions present in solution the weaker the acid strength and the higher the pH.

• The more hydrogen ions present in solution the greater the acid strength and the lower the pH.

• The fewer hydrogen ions present in solution the weaker the acid strength and the lower the pH.

• The fewer hydrogen ions present in solution the greater the acid strength and the higher the pH.

Tags

NGSS.MS-PS1-1

How do acids and bases compare?

• Acids have pH values greater than 7 and turn litmus paper red. Bases have pH values less than 7 and turn litmus paper blue.

• Acids have pH values less than 7 and turn litmus paper blue. Bases have pH values greater than 7 and turn litmus paper red.

• Acids have pH values less than 7 and turn litmus paper red. Bases have pH values greater than 7 and turn litmus paper blue.

• Acids have pH values greater than 7 and turn litmus paper blue. Bases have pH values less than 7 and turn litmus paper red.

How do acidic solutions compare to basic solutions?

• Acidic solutions have a greater hydroxide ion concentration than hydrogen ion concentration.

• Acidic solutions have equal concentrations of hydrogen ions and hydroxide ions.

• Acidic solutions have a greater concentration of hydrogen ions than hydroxide ions.