CHEMICAL BUFFER SYSTEMS

H2CO3

HCO3-

H+

Na+ Cl-

Add

HCl

Na+ Cl-

H+ Cl-

Unbuffered Salt Solution

All protons are free

H2CO3: HCO3- Buffer

Add

HCl

H2CO3

HCO3- + H+

Protons taken up as Carbonic Acid

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