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Title: Mole Island Diagram
Description:

HONORS CHEMISTRY
February 9, 2021

Unit 8: Stoichiometry

Pick up papers from Stoichiometry Unit

     2 Na       +       Cl2       -->       2NaCl
       2 g        +       1 g        =           2 g              (WRONG)

   2 atoms   +  1 molecule   =  2 molecules      (Correct)
     2 mol      +     1 mol       =         2 mol            (Correct)

    2 Na       +       Cl2       -->       2NaCl
   100 g                x L                      x g

    x g NaCl  =  100 g Na (1 mol Na/23 g Na)(2 mol NaCl/2 mol Na)(58.5 g NaCl/1 mol NaCl)  =  254 g NaCl

                    [1 mol  =  Molar Mass  =  6.02 x 1023 particles  = 22.4 L @ STP]

    x L Cl2  =  100 g Na(1 mol Na/23 g Na)(1 mol Cl2/2 mol Na)(22.4 L Cl2/1 mol Cl2) = 49 L Cl2

Use Stoichiometry Island Diagram.  

           GIVEN:        2 TiO2  +  4 Cl2  +  3 C  -->  1 CO2  +  2 CO    +  2 TiCl2 


        a)  How many moles of chlorine will react with 4.55 moles of carbon?
                                                                                                               (6.07 mol Cl2)

        b)  How many grams of titanium (IV) oxide will react with 4.55 mole of carbon? 
                                                                                                               (242 g)

        c)  How many molecules "tickle-4" (TiCl4) can be produced from 115 g "tyoto" (TiO2)?   
                                                                                                                (8.66 g x 1023)

        d)  How many liters of CO can be made from 86 g of C? 
                                                                                                               (107 L)

        GIVEN:          2 Ir  +  Ni3P2    -->  3 Ni  +  2 IrP  


        a)  If 5.33 x 1028 molecules of Ni3P2 react with excess Ir, how many grams of IrP are produced?
                                                                                                               (3.98 x 107 g IrP)

        b)  How many grams of Ir will react with 465 g of Ni3P2?
                                                                                                               (186 g Ir)

        c)  How many moles of Ni are produces id 8.7 x 1025 atoms of Ir are consumed?
                                                                                                               (217 mol Ni)

  Allow ~15 minutes of class time to work on Stoichiometry - Problem Sheet 1  pdf

LIMITING REACTANT    

Example 1 
        N
2   +    H2  -->  NH3
  
    100 g       100 g        X g                                    Answer:  121.38 g NH3

Example 2
        X      +       2Y
      -->       Z2                Z = 5 g/mol
  
    50 L       2.4 x10 24 atoms    X g                                    Answer:  20 g Z

Factors to consider:  cost of reactants, disposal of unused reactants.

    dollars   +  cents   -->  Products       (want cents to be excess and dollars to be limiting)


HW: 
Vocabulary - Stoichiometry  pdf
         
Stoichiometry - Problem Sheet 1  pdf

My crown is called content,
a crown that seldom
kings enjoy
   - William Shakespeare

Textbook:  Introductory Chemistry Concepts and Connections 4th Edition  by Corwin  (pg 250-279).
                                      
10.1 INTERPRETING A CHEMICAL EQUATION (pg 251-253)
    •
To relate the coefficients in a balanced chemical equation to:
      
(a) moles of reactants and products
       (b) liters of gaseous reactants and products

10.2 MOLE-MOLE RELATIONSHIPS (pg 254-255)
    • To relate the number of moles of two substances in a balanced chemical equation.

10.3 TYPES OF STOICHIOMETRY PROBLEMS (pg 255-257)
    •
To classify the three basic types of stoichiometry problems;
        mass-mass, mass-volume, and volume-volume.
    • To state the procedure for solving a
stoichiometry problem, given the balanced equation.

10.4 MASS-MASS PROBLEMS (pg 257-259)
    • To perform mass-mass stoichiometry calculations.

10.5 MASS-VOLUME PROBLEMS  (pg 260-262)
    • To perform mass-volume stoichiometry calculations.

10.6 VOLUME-VOLUME PROBLEMS (pg 262-265)
    • To perform volume-volume stoichiometry calculations.

10.7 THE LIMITING REACTANT CONCEPT (pg 265-267)
    •
To explain the concept of a limiting reactant.
    • To identify the limiting reactant in a chemical reaction, given the number of moles of each reactant
.

10.8 LIMITING REACTANT PROBLEMS (pg 267-271)
   
• To perform mass-mass stoichiometry calculations involving a limiting reactant.
    • To perform volume-volume
stoichiometry calculations involving a gaseous limiting reactant.

10.9 PERCENT YIELD (pg 271-272)
    • To calculate the percent yield for a reaction, given the actual yield and theoretical yield.

Homework:
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