Unit 5 Review

To determine the mole ratio of two substances in a reaction, you must know...

• The balanced chemical reaction

• The molar mass of the two substances

• The atomic weight of each substance

• What the limiting reactant is

Tags

NGSS.HS-PS1-7

Stoichiometry involves using a ​ (a)   to determine the ​ (b)   of reactants and products involved in reactants

• periodic table
• balanced chemical equation
• relative masses
• percent yield

Tags

NGSS.HS-PS1-7

To calculate masses from the moles of reactants or products, we can use the ​ (a)   of substances which ban be found ​ (b)  

• in the balanced chemical equation
• percent yield
• molar masses
• on the periodic table

Tags

NGSS.HS-PS1-7

The limiting reactant _____ in a chemical reaction.

• is completely used up

• has some left over

• is formed first

• precipitates out of solution

The​ (a)   is the maximum amount of a given product that can be formed when the ​ (b)   is completely consumed.

• percent yield

• activation energy

• actual yield

• theoretical yield
• limiting reactant

What is percent yield?

• The actual yield of a product as a percentage of the theoretical yield

• The ratio of the mass of reactants to products in a chemical reaction

• The percentage of reactants used in a reaction

• The percentage of energy conserved in a reaction

Tags

NGSS.HS-PS1-7

Which is usually SMALLER?

• actual yield

• percent yield

• it could be either

What is needed to calculate masses from moles of reactants or products?

• Molar masses of substances

• Temperature measurements

• Energy calculations

• Pressure measurements

Tags

NGSS.HS-PS1-7

What happens when reactants are not present in stoichiometric quantities?

• One reactant runs out first, limiting the amount of products that can form

• The reaction proceeds without any limitations

• The temperature of the reaction increases

• The pressure of the reaction decreases

Tags

NGSS.HS-PS1-7

What is the actual yield of a reaction?

• The amount produced, usually less than the maximum expected (theoretical yield)

• The maximum amount that can be produced

• The amount of reactants used

• The energy released in the reaction

Tags

NGSS.HS-PS1-7