How many grams of zinc will react with 25 mL of a 4.0 M HCl solution to produce hydrogen gas? 2HCl + Zn ⟶ ZnCl2 + H2
Answers
Answered by
3
Answer:
Find moles of HCl used:
c
=
n
V
, where c is the molarity , n moles of substance and v the volume of solution in L , gets converted into
n
=
c
⋅
V
n
(
H
C
l
)
=
4
⋅
0.025
=
0.1
m
o
l
Calculate the moles of zinc that will react with HCl:
n
(
Z
n
)
=
n
(
H
C
l
)
2
=
0.1
2
=
0.05
m
o
l
Calculate the mass of Zn:
m
(
Z
n
)
=
n
(
Z
n
)
⋅
M
(
Z
n
)
=
0.05
⋅
65
=
3
,
25
g
Answered by
1
Answer:
6,5 grams
Explanation:
Find moles of HCl used:
c
=
n
V
, where c is the molarity , n moles of substance and v the volume of solution in L , gets converted into
n
=
c
⋅
V
n
(
H
C
l
)
=
4
⋅
0.025
=
0.1
m
o
l
Calculate the moles of zinc that will react with HCl:
n
(
Z
n
)
=
n
(
H
C
l
)
2
=
0.1
2
=
0.05
m
o
l
Calculate the mass of Zn:
m
(
Z
n
)
=
n
(
Z
n
)
⋅
M
(
Z
n
)
=
0.05
⋅
65
=
3
,
25
g
Explanation:
hope it helps
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