Discuss any experience you've had where the spund from a sound source changed as you got closer or further from the sound source.
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Ответ:
The pH is about 12.7.
Explanation:
NaOH is a strong base, meaning it will dissociate basically completely in solution to form
N
a
+
and
O
H
−
ions in solution.
One mole of
O
H
−
ions is created for every mole of NaOH that is dissolved. If it's a .05 M solution of NaOH, then it can also be interpreted to be a .05M solution of
O
H
−
.
p
O
H
(The pH scale for bases) can be found by taking the negative logarithm of
O
H
−
concentration.
p
O
H
=
−
log
[
.05
M
]
= 1.3.
However, we are trying to find
p
H
, so we must use the formula
p
O
H
+
p
H
=
14
.
Now that we know
p
O
H
=
1.3
,
p
H
=
14
−
1.3
=
12.7
.
(found the answer here https://socratic.org/questions/what-is-the-ph-of-a-0-050-m-naoh-solution)