Question

Zn + 2HCl → ZnCl2 + H2
H2 gas produced by the reaction is collected over water. If
0.3 g of Zn are consumed at 27° in the reaction, calculate the volume of hydrogen produced. (Given:
Barometric reading=750mm, Aqueous tension at 27 =25 mm, Atomic weight of Zn=65.4).

Answer 1

Answer:

Use zinc metal's molar mass to determine how many moles you have in that

4.33-g

sample

4.33

g

⋅

1 mole Zn

65.38

g

=

0.06623 moles Zn

This means that the reaction produced

0.06623

moles of hydrogen gas.

Explanation:

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