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Question

If 2.5 moles of zinc react with 6.0 moles of hydrochloric acid react in the equation Zn+2HClZnCl2+H2 , what is the limiting reactant?

A
Zn
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B
HCl
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C
H2
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D
ZnCl
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E
ZnH
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Solution

The correct option is A Zn
Zn+2HClZnCl2+H2
1 mole of Zn reacts with 2 moles of HCl.
2.5 moles of Zn will react with 2×2.5=5.0 moles of HCl.
However 6.0 moles of HCl are present.
Thus, HCl is the excess reactant and Zn is the limiting reactant.

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