acid/base balance
DESCRIPTION
ACID/BASE BALANCE. D. C. Mikulecky. ACIDS, BASES AND SALTS. CHEMICAL COMPOUNDS CAN BE PROTON DONORS OR ACCEPTORS PROTON DONORS ARE ACIDS PROTON ACCEPTORS ARE BASES ACIDS AND BASES REACT TO NEUTRALIZE EACH OTHER FORMING SALTS. ACID/BASE REACTIONS. HCl + NaOH NaCl + H 2 O. - PowerPoint PPT PresentationTRANSCRIPT
D. C. Mikulecky
CHEMICAL COMPOUNDS CAN BE PROTON DONORS OR ACCEPTORS
PROTON DONORS ARE ACIDS PROTON ACCEPTORS ARE BASES ACIDS AND BASES REACT TO
NEUTRALIZE EACH OTHER FORMING SALTS
HCl + NaOH NaCl + H2O
ACID + BASE SALT + WATER
Acidic Alkaline (Basic)
[OH -]
[H+]
NeutralpH
0 147
Acidosis Alkalosis
Normal7.35-7.45
Venous Blood Arterial Blood
6.8 8.0
7.4
H2CO3
HCO3-
H+
Na+ Cl-
AddHCl
Na+ Cl-
H+ Cl-
Unbuffered Salt Solution All protons are free
H2CO3: HCO3- Buffer
AddHCl
H2CO3
HCO3- + H+
Protons taken up as Carbonic Acid
Weak acid/salt systems act as a “sponge” for protons
As acidity tends to increase they take protons up
As acidity tends to decrease they release protons
Carbonic acid/Bicarbonate: Primary buffer against non-carbonic acid changes
Proteins: Primary ICF buffer, also ECF Hemoglobin: Primary buffer against
carbonic acid changes Phosphate: Urinary buffer, also ICF
Alterations in ventilation alter the rate of excretion of carbon dioxide
Alterations in the rate of carbon dioxide excretion cause alterations in pH through carbonic acid
This way the respiratory system can help control non-respiratory acidosis and alkalosis
Metabolic: Severe diarrhea, Diabetes mellitus, strenuous exercise, uremia
Respiratory: hypoventilation
Metabolic: Vomiting, ingestion of alkaline drugs
Respiratory: hyperventilation
Proton excretion
Bicarbonate excretion
Ammonia secretion