1.3 STOICHIOMETRY (LIMITING REACTANT)

Limiting reactant is defined as

• reactant that speed up the reaction

• reactant that left over at the end of the reaction

• reactant that completely consumed an used up first in the reaction

• reactant that slow the rate of reaction

When does a chemical reaction stop?

• When the lab is finished

• When the excess reactant is used up

• When the limiting reactant is used up

• Chemical reactions never stop

By referring to the equation above, determine the limiting reactant if 12 moles of P₄ react with 15 moles of O_2.

• P₄

• P₄O₆

• O₂

• none of the above

The excess reactant is not completely used up during the reaction.

• True

• False

If 2 moles of aluminum and 2 moles of chlorine are reacted, identify the limiting reactant.

• AlCl₃

• Al

• Cl_2

• none of the above

How much excess reactant is leftover after if 6.30g of ammonia react with 1.80g of oxygen?

• 9.75 g NH₃

• 0.765 g NH₃

• 4.80 g O₂

• 5.54 g NH₃