Combined: Water the solvent of life! + Acids & bases + Buffers

In water strong acids......

• remain as a salt

• completely dissociate

• accept protons

• leave -OH

A proton (H⁺) acceptor is?

• an acid

• a base

• an alkyl

Physiological pH is -

• 6

• 6.4

• 7

• 7.4

pH is a measure of the concentration of ...?

• K⁺

• OH^-

• Cl^-

• H⁺

What are the units of [H] in: pH = -log₁₀[H⁺]

• mM

• nM

• M

• pM

At what point does [conjugate base] = [conjugate acid]?

• pI

• V_max

• pK_a

• K_m

What is the pK_a when the buffering region is 4.5 to 6.5?

• 5

• 5.3

• 5.5

• 5.7

pH of lysosome is?

• ~2.5

• ~3.5

• ~4.5

• ~5.5

Dihydrogen phosphate/hydrogen phosphate system controls...?

• pH of blood

• gastric pH

• pH of lysosomes

• cellular pH

What % of the brain is water?

• 10%

• 50%

• 75%

• 85%