Flashcards in Basic Chemistry and Water: pH Deck (14):
What is pH?
A measure of free hydrogen ion concentration.
Why is pH important to biological systems?
It can affect electrostatic interactions (bonding), which can affect the structure and function of a biomolecule.
How can pH be calculated if you know [H+]?
pH = - log [H+]
What molecules does water dissociate into?
H+ and OH-
What is the term for the point at which the concentration of reactants and products is unchanging with time?
What are the concentrations equilibrium concentrations of [H+] and [OH-} in water?
What is the Keq of water?
What is the molarity of water?
What is the pH of water?
What is the formula for calculating Ka?
Ka = [H+][A-] / [HA]
Which equation allows us to correlate pH with pKa?
pH = pKa + log ([A-] / [HA])
When [A-] is equal to the [HA], what is pH?
pH = pKa
How does pH affect enzyme function?
If functional groups are not correctly protonated (i.e., are in the wrong pH), the enzyme will not function properly.