lecture 9 Flashcards
molecules dissociate to equal number of hydrogen ions (H+) and hydroxide ions to form?
water
what are substances that
dissociate in water → releasing
hydrogen ions (H+)
acid
what either take up hydrogen
ions (H+) or release hydroxide
ions (OH−)
bases
What is a log of H+ ion concentration
pH
What ranges from 0 to 14,
is used to indicate the acidity and
basicity (alkalinity) of a solution
The pH scale
pH above 7 → is?
basic
pH below 7 is
acidic
as pH decreases → H+
concentration exponentially?
Increases
What is acidosis
Acidosis: pH value below 7.35
What is Alkalosis?
pH above 7.45
What mechanisms prevent pH changes:
Respiratory systems
– Urinary systems
– Buffers in blood & body fluids
What is a buffer?
Buffers are pairs of
chemicals in blood and
body fluids, which help to
Stabilize pH within
normal & protect the
body from excess acid or
base.
How do buffers work
Buffers consist of a pair of components:
one component defends against
excess hydrogen ions (H+), the other defends against excess
hydroxide ions (OH−)
what type of solution has a pH of 7. 0
neutral
What type of solution solution has a
hydrogen ion concentration [H+] lower
than the neutral pH of 7.0
Basic
