How do you identify a limiting reactant?

If 2.50 mol of copper and 5.50 mol of silver nitrate are available to react by single replacement, identify the limiting reactant

  • Answer:

    For the redox reaction Cu + 2AgNO3 = Cu(NO3)2 + 2Ag you need two moles of silver nitrate for every mole of copper. You would need 5 moles of silver nitrate to react with 2.5 moles of copper, therefore copper is the limiting reactant and silver nitrate is in excess.

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For the redox reaction Cu + 2AgNO3 = Cu(NO3)2 + 2Ag you need two moles of silver nitrate for every mole of copper. You would need 5 moles of silver nitrate to react with 2.5 moles of copper, therefore copper is the limiting reactant and silver nitrate is in excess.

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