Unit 14 Test Review

Define Limiting Reactant

• The reactant that is consumed (used up) first in a chemical reaction. Determines the amount of product that can be formed in a reaction.

• Any reactant that remains after the limiting reactant is consumed in a chemical reaction; the leftover reactant(s)

• Indicated by the coefficients of a chemical reaction.

• Amount of product obtained experimentally

• Calculated amount of product

Define Excess Reactant

• The reactant that is consumed (used up) first in a chemical reaction. Determines the amount of product that can be formed in a reaction.

• Any reactant that remains after the limiting reactant is consumed in a chemical reaction; the leftover reactant(s)

• Indicated by the coefficients of a chemical reaction.

• Amount of product obtained experimentally

• Calculated amount of product

Mole Ratio

• The reactant that is consumed (used up) first in a chemical reaction. Determines the amount of product that can be formed in a reaction.

• Any reactant that remains after the limiting reactant is consumed in a chemical reaction; the leftover reactant(s)

• Indicated by the coefficients of a chemical reaction.

• Amount of product obtained experimentally

• Calculated amount of product

Actual Yield

• The reactant that is consumed (used up) first in a chemical reaction. Determines the amount of product that can be formed in a reaction.

• Any reactant that remains after the limiting reactant is consumed in a chemical reaction; the leftover reactant(s)

• Indicated by the coefficients of a chemical reaction.

• Amount of product obtained experimentally

• Calculated amount of product

Theoretical Yield

• The reactant that is consumed (used up) first in a chemical reaction. Determines the amount of product that can be formed in a reaction.

• Any reactant that remains after the limiting reactant is consumed in a chemical reaction; the leftover reactant(s)

• Indicated by the coefficients of a chemical reaction.

• Amount of product obtained experimentally

• Calculated amount of product

What is the formula for percent yield?

• (actual/theoretical)

• (actual/theoretical) x 100

• (theoretical/actual)

• (theoretical/actual) x 100

What is the molarity of 1.25 moles of calcium carbonate in 1.22 liters of solution. (Molarity= Moles/ Liters)

• 0.0125 M

• .96 M

• .0122 M

• 1.02 M

Balance the equation first.

What are the mole ratios of your coefficients?

_______ Na₂O + ______ H₂O → ______ NaOH

• 1: 2: 2

• 1:1:2

• 2:1:1

• 3:2:2

Balance the equation first.

How many moles of NaOH will be produced if I have 4 moles of Na₂O and 4 moles of H₂O.

_______ Na₂O + ______ H₂O → ______ NaOH

• 2 moles

• 4 moles

• 8 moles

• 1 mole

Balance the equation first.

From the balanced equation, What is the mole ratio of NaOH to H₂O?

_______ Na₂O + ______ H₂O → ______ NaOH

• 1:1

• 2:1

• 1:2

• 2:2