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PH scale
This scale mesures the acidity or the basicity and is based on H+ and OH- concentration. Ranges from 0-14. 7 being neutral (pure water)
As the pH decreases…
The H+ increases
The most biological fluids are between
6 and 8
A substance with a pH of 3 is…
1000 times more acidic than one with a pH of 6
Buffers absorb and release H+
Helping keep the pH constant.
Ex. PH of blood 7.4 ( cells can maintain their pH even when acids or bases are added to them)
Most buffers contain…
A weak acid and its corresponding base which accept or release H+