Stoichiometry and Limiting Reagents BC

When you use a balanced chemical equation to calculate the amount of a product for you prediction, it is referred to as the

• experimental value

• theoretical value

• true amount

• percent yield

Tags

NGSS.HS-PS1-7

If 15.0 g of copper(II) chloride, CuCl₂(s), reacts with 20.0 g of sodium nitrate, NaNO₃(s), in solution, identify the limiting reagent and the amount of that reagent consumed.

• CuCl₂(s) is the limiting reagent and 0.112 mol are consumed

• CuCl₂(s) is the limiting reagent and 0.223 mol are consumed

• NaNO₃(s) is the limiting reagent and 0.235 mol are consumed

• NaNO₃(s) is the limiting reagent and 0.117 mol are consumed

Tags

NGSS.HS-PS1-7

P₄ + 3 O₂ → P₄O₆

What is the limiting reagent if 12 mol of P₄ react with 15 mol of O₂?

• P₄

• O₂

• P₄O₆

• none of the above

Theoretical yield = 73.0 g

Actual yield = 62.0 g

Calculate the percent yield.

• 1.16%

• 116%

• 85.0%

• 76.0%

What is the measured amount of a product obtained from a chemical reaction?

• mole ratio

• theoretical yield

• percentage yield

• experimental yield

What mass of ammonia, NH₃, can be produced from the reaction of 28.0 g of nitrogen gas and 25.0 g of hydrogen gas, H₂(g)?

• 141 g

• 8.26 g

• 17.0 g

• 34.1 g

Silver nitrate and sodium phosphate are reacted in equal masses of 200 g each. Determine the mass of silver phosphate produced.

3 AgNO₃(aq) + Na₃PO₄(aq) → Ag₃PO₄(s) + 3 NaNO₃(aq)

• 164 g

• 64.0 g

• 146 g

• 54.7 g

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

What is a limiting reagent?

• the reactant that determines how much product can be made

• the reactant that is in excess

• the product that you can make the most of

• the amount of reactants that react with each other

If the percentage yield for a chemical reaction performed in the laboratory is 80.0%, the

• actual yield is 80.0g for every theoretical yield of 100g.

• actual yield is 80 times as much as the theoretical yield.

• theoretical yield is 80 times as much as the actual yield.

• theoretical yield is 80.0 g for every actual yield of 100g.

Tags

NGSS.HS-PS1-7