pH, Buffers

An acid has a pH

• higher than 7

• lower than 7

• 7

• greater than 14

a base has a pH of

• lower than 7

• higher than 7

• 7

• it only has a pOH

the more H+ ions the

• stronger the acid

• weaker the acid

• it neutralizes

Tags

NGSS.HS-PS1-5

What might happen if buffers did not exist within the human body?

• Our blood and other bodily fluids might become too acidic or basic.

• Our stomach acid would not be able to break down food.

• We would not be able to process glucose within our cells.

• We would not be able to inhale oxygen into our lungs.

Tags

NGSS.HS-LS1-3

Adding more H+ ions to water will...

• Lower the pH (increase acidity)

• Increase the pH (lower acidity)

• Not affect the pH

How is our body able to maintain a consistent pH (acidity level) even when the food we consume can be very acidic?

• Buffers in our body resist a change in pH

• Our diets naturally have a constant pH

• Water is resistant to a change in pH

Tags

NGSS.HS-LS1-3

Lemon juice (low pH, very acidic) is added to both a cup of water (pH = 7) and a buffered solution (pH = 7). What do you predict will happen?

• Both water and buffer solution pH will drop dramatically

• Only water pH will drop

• Only buffer solution pH will drop

• Neither solution's pH will drop

A solution with a pH of 7 is considered to be...

• Acidic

• Neutral

• Basic