Buffers

A buffer is defined as the

• ability to resist pH change

• ability to prevent pH from decreasing

• ability to resist a pH increase

• ability to resist pH change when small amount of acid added

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

A pH of 14 is a .....

• strong acid
• weak acid
• Strong base
• Weak base

The pH scale is a range from:

• 1-7
• 0-14
• 1-5
• 1-20

A(n) ______ is a substance with a pH less than 7

• Acid
• Alkaline
• Base
• Buffer

What is the only substance with a neutral pH of 7?

• Milk
• Orange Juice
• Water
• Blood

Buffers allow us to keep

• Homeostasis

• Dynamic equilibrium

• Cell transport

• Selective permeability

Tags

NGSS.HS-LS1-3

Where do you find most of the buffering systems in our body?

• In our nervous system

• In our blood

• On our skin

• In our digestive system

Tags

NGSS.HS-LS1-3

A beaker contains a liquid and a universal indicator. The color is red. This color indicates the solution is

• neutral

• a strong base

• a weak acid

• a strong acid

Two beakers have liquids in them. When you add a base such as ammonia to beaker 1, the pH did not change. But when you add ammonia to beaker 2, the pH changes drastically. Choose the best explanation.

• Beaker 1 had only water and Beaker 2 contained a buffer.

• Beaker 1 contained a buffer and Beaker 2 contained only water.

• Beaker 2 contained an acid.

• The beaker that changed pH contained a buffer.