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Chemistry
Chemistry
Problem
Find out the mass of
NH
4
Cl
\text{NH}_4\text{Cl}
NH
4
Cl
dissolved in 500 mL to have
pH
=
4.5
\text{pH} = 4.5
pH
=
4.5
.
K
b
\text{K}_b
K
b
for
NH
4
OH
\text{NH}_4\text{OH}
NH
4
OH
is
1.8
×
10
−
5
1.8 \times 10^{-5}
1.8
×
1
0
−
5
.
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