Ms. A's All I do is stoich, stoich, stoich...

Balancing Equations

100

Equations must be balanced so that they will obey this law.

What is the Law of Conservation of Mass/Matter?

200

Si + S₈ -> Si₂S₄

4Si + S₈ -> 2Si₂S₄

300

Cu +CO₂ + O₂ + H₂O -> CuCO₃ + Cu(OH)₂

2Cu +CO₂ + O₂ + H₂O -> CuCO₃ + Cu(OH)₂

400

Al + FeO -> Al₂O₃ + Fe

2Al + 3FeO -> Al₂O₃ + 3Fe

500

C₇H₆O₂ + O₂ -> CO₂ +H₂O

2C₇H₆O₂ + 15O₂ -> 14CO₂ +6H₂O

Types of Chemical Rxn

100

2Na + S -> Na₂S

Synthesis 

200

NaCl +AgNO₃ -> AgCl + NaNO₃

Double Replacement

300

2Pb(NO₃)₂ -> 2Pb + 4NO₃

Decomposition

400

CH₄ + 2O₂ -> CO₂ + 2H₂O

Combustion!

500

BaCl₂ + Na₂SO₄ -> BaSO₄ + 2NaCl

Double Replacement 

Mole-Mole Stoichiometry

100

2Buns + 1Burger + 1Cheese + 3Veggies -> 1Cheeseburger

How many cheeseburgers can you make with 16 veggies?

5 cheeseburgers!

200

2H₂ + O₂ -> 2H₂O

How many moles of O₂ is needed to react fully with .5 moles of H₂?

.25 moles of O₂

300

2S + 3O₂ -> 2SO₃

If you have 1.75 moles of SO_3, how many moles of O₂ was consumed?

2.625 moles of O₂

400

Fe₂O₃ + 3H₂ -> 2Fe + 3H₂0

If you react 25 moles of Fe₂O₃ with excess H₂, how many moles of iron are produced?

50 moles of Fe

500

3Cu + 8HNO₃ -> 3Cu(NO₃)₂ + 2NO + H₂O

How many moles of HNO₃ are needed to react with 2.56 moles of copper?

6.827 moles of Cu

All Units Stoichiometry

100

Zn + 2HCl -> ZnCl₂ + H₂

How many moles of ZnCl2 will be produced from 61.0g of Zn, assuming HCl is available in excess?

.933 moles of ZnCl2

200

B₂H₆ + 3O₂ -> 2HBO₂ + 2H₂O

What mass of O2 will be needed to burn 36.1 g of B2H6?

125g of O₂

300

2Na₂S₂O₃ + AgBr -> NaBr + Na₃[Ag(S₂O₃)₂] 

How many moles of Na₂S₂O₃ are needed to react completely with 1.75x10²⁵ molecules of AgBr?

58.14moles of Na₂S₂O₃

400

2H₂S + O₂ -> 2H₂O + 2S

If 5.0L of gaseous H₂S reacts with excess O₂, how many atoms of S is produced?

1.34x10²³ atoms of S

500

AgNO₃ + HI -> AgI + HNO₃

When 0.050 L of AgNO₃ is treated with excess amounts HI gas, what is the mass of AgI produced?

5 g of AgI

Miscellaneous

100

The thing that will cause your reaction to stop.(when it runs out)

What is the limiting reactant/reagent?

200

The coefficient in a balanced chemical equation represents this.

What is the number of moles?

300

The number of liters of one mole of a gas @ STP.

22.4 L

400

DAILY DOUBLE. The calculation of quantitative (measurable #) relationships of the reactants and products in a balanced chemical reaction.

What is stoichiometry?

500

CO₂ and H₂O

What are the products of combustion?