Step-by-step explanation:
Calculation:
The pH of a solution is calculated by the formula:
p
H
=
−
log
[
H
+
]
Now the dissociation reaction of HCl is:
(
0.1
M
)
H
C
l
→
(
0.1
M
)
H
+
+
(
0.1
M
)
C
l
−
Here one mole of HCl gives one mole of hydrogen ions. Therefore, the concentration of
H
+
ion is the same as the concentration of HCl, given that is 0.1 M.
Now substitute this value in the formula:
p
H
=
−
log
[
H
+
]
=
−
log
(
0.1
)
=
1