CH 10 FLASHCARDS Stoichiometry review

Front

What is the first thing you must do to solve a stoichiometry problem?

Back

Write a Balanced Equation

Front

WO₃ + H₂ --> W + H₂O
What coefficient goes in front of H₂ when you balance this equation?

Back

3

Front

Equation for Percent Yield

Back

(Actual/Theoretical) X 100

Front

True or False: You must convert grams to moles to do stoichiometry.

Back

True

Front

2H₂ + O₂ → 2H₂O
How many moles of water can be produced if 8 moles H₂ are used?

Back

8 moles

Front

2H₂ + O₂ → 2H₂O
How many moles of oxygen are consumed if 8 moles H₂ are used?

Back

4

Front

Limiting Reagent

Back

what you run out of first

Front

Excess Reagent

Back

what you have left over

Front

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of Mg to moles Fe?

Back

3mol Mg / 2 mol Fe

Front

For the Balanced Reaction: 3 Mg + 1 Fe₂O₃ → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?

Back

3 mol MgO / 2 mol Fe