lecture 2

Question 1

2=log10(X) how do you find X

Answer 1

10^2

Question 2

PH + pOH =

Answer 2

14

Question 3

is HA protonated or deprotonated

Answer 3

Protonated

Question 4

is A- protonated or deprotonated

Answer 4

Deprotonated (conjugate base)

Question 5

what is an acid

Answer 5

a proton donor

Question 6

what is a base

Answer 6

a proton acceptor

Question 7

what is a buffer and what does it consist of

Answer 7

a solution that can resist small changes in PH, maintaining the solution at a constant pH. comprises or a weal acid and a salt containing its conjugate base

Question 8

what equation do you use to calculate the pH of a weak acid

Answer 8

Henderson-Hasselbalch equation pH = pKa + log10(A-/HA)

Question 9

what makes carbonic acid a good biological buffer

Answer 9

pKa is 6.1, meaning at oH 6.1 half the acid is carbonic acid and half is the conjugate base, at pH 7.4 (pH of blood) there is still a balanced mix of acid and conjugate base. so there is carbonic acid available to release or accept H+ if it drops or increases