Chap 9-Acids&Bases Flashcards
pH =
pH is the
potential hydrogen
concentration of hydrogen ions (H+)
The pH of blood indicates the net_______
result of normal acid-base regulation, any acid-base imbalance, and the body’s compensatory mechanisms
Human blood must maintain a_________ pH range
Blood =
very narrow; 7.35 – 7.45
less than _____or greater than ____death occurs
< 6.8 or > 8.0
One Proton (+) One Electron (-)
electrically balanced
An Acid is…
A molecule that can donate a H+ ion
An acid can be weak, moderate, or strong depending on its ________
Weaker acids are closer______
Stronger acids are closer to_____
pH
to 7
to 1
A Base or alkali is…
A molecule that can accept a H+ ion
A base can be weak, moderate, or strong depending on its pH
Weaker bases are closer to pH __
Stronger bases are closer to pH ____
pH
7
14
Bronsted Theory
An acid is _______
A base is_______
When an acid donates it proton, what remains is called what?
Defines an acid as a proton, or H+ ion donor.
A base is a proton acceptor.
When an acid donates its proton, what remains is called
the conjugate base.
When a base accepts a proton, it is converted into its
Ex:
conjugate acid.
NH3 + H+ = NH4+ (ammonia to ammonium)
HCO3- + H+ = H2CO3 (bicarb to carbonic acid)
pH Range is from________
If [H+] is high, the solution is________; pH < 7
↑ H+ ↓ pH (Acidic)
If [H+] is low, the solution is basic or alkaline ; pH > 7
↓ H+ ↑ pH (Alkaline)
Acids are H+ donors.
Bases are H+ acceptors, or give up OH- in solution.
0 - 14; acidic
not important Acids and bases can be: Strong –\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ ex: Weak –\_\_\_\_\_\_\_\_\_\_\_ ex:
dissociate completely in solution
HCl, NaOH
dissociate only partially in solution
Lactic acid, carbonic acid
pH scale = 1 to 14
The p-function operator means the negative logarithm of.
pH = -log [H+]
In this case, a range of 100 to
10-14 onto a range of 1 to 14.
Calculate [H+] for pH of 7.4?
0.00004mEq , 40nEq/L