Transcript 8. Unit VIII - Coordination Chemistry

DCI 2.1 - Chemical Equations
- Reactants and Products
1. Responses of previous students who were asked
to write the balanced chemical equation for Exp #1
in the BCE included;
a) 4R + 4BG --> 4B + 4RG
b) R4 + (BG)4 --> (RG)4 + B4
c) R + BG --> RG + B
d) R4 + BG4 --> RG4 + B4
Identify the best balanced chemical equation for the
reaction that occurred in Exp #1, and provide a
short explanation. Also provide an explanation for
why the other choices were not selected.
2. Responses of previous students who were asked
to write the balanced chemical equation for Exp #2
in the BCE included;
a) 4R + 2BG --> 2B + 2RG
b) R4 + (BG)2 --> (RG)2 + B2
c) R + BG --> RG + B
d) 4R + 2BG --> 2B + 2RG + 2R
e) R4 + (BG)2 --> (RG)2 + B2 + R2
Identify the best balanced chemical equation for the
reaction that occurred in Exp #2, and provide a
short explanation. Also provide an explanation for
why the other choices were not selected.
3. Responses of previous students who were asked
to write the balanced chemical equation for Exp #3
in the BCE included;
a) 2R + 4BG --> 2B + 2RG
b) R2 + (BG)4 --> (RG)2 + B2
c) R + BG --> RG + B
d) 2R + 4BG --> 2B + 2RG + 2BG
e) R2 + (BG)4 --> (RG)2 + B2 + (BG)2
Identify the best balanced chemical equation for the
reaction that occurred in Exp #3, and provide a
short explanation. Also provide an explanation for
why the other choices were not selected.
4. Write the balanced chemical equation based on the
following new Experiment.
5. A reagent in excess is a reactant that is not
completely used up in a chemical reaction, a
limiting reagent is a reactant that limits the amount
of product formed in a chemical reaction. Look back
at Table II for Exp#1, #2 and #3 and select from
below the statement that best fits the assignment of
the excess reagent and the limiting reagent.
In Exp #1:
a) R is the excess reagent and BG is the limiting reagent:
b) BG is the excess reagent and R is the limiting reagent:
c) both R and BG are excess reagents:
d) both R and BG are limiting reagents
In Exp #2:
a) R is the excess reagent and BG is the limiting
reagent:
b) BG is the excess reagent and R is the limiting
reagent:
c) both R and BG are excess reagents:
d) both R and BG are limiting reagent
In Exp #3:
a) R is the excess reagent and BG is the limiting
reagent:
b) BG is the excess reagent and R is the limiting
reagent:
c) both R and BG are excess reagents:
d) both R and BG are limiting reagents
6. Below are shown the initial and final condition for a
new chemical reaction.
Complete the Table
Initial
Exp
Condition
Reactant 1 Reactant 2
Final
Condition
Product 1
Product 2
Formulas
Initial Amounts
Change Amounts
Final Amounts
Identify the reactant that is the limiting reagent and the excess reagent.
7. In the reaction describe in the balanced chemical equation,
2SO2(g) + O2(g) --> 2SO3(g)
6 molecules of SO2(g) are mixed with 2 molecules of O2(g). Set
up a table similar to Q6 above and determine each of the
following;
a) the limiting reagent;
b) the excess reagent;
c) the number of molecules of SO3 formed when the reaction is
complete;
d) the number of molecules of SO2 remaining when the reaction
is complete;
e) the number of molecules of O2 remaining when the reaction is
complete;
8. In the reaction describe in the balanced chemical equation,
2SO2(g) + O2(g) --> 2SO3(g)
5 moles of SO2(g) are mixed with 2 moles of O2(g). Set up a table
similar to Q6 above and determine each of the following;
a) the limiting reagent;
b) the excess reagent;
c) the number of moles of SO3 formed when the reaction is
complete;
d) the number of moles of SO2 remaining when the reaction is
complete;
e) the number of moles of O2 remaining when the reaction is
complete;
Clicker Questions
1. Consider the following chemical equation describing
the reaction between sulfur dioxide and oxygen.
2SO2 (g) + O2(g) → 2SO3(g)
Given the following container as
representing the final condition:
Which of the containers (-->) best
represents the initial conditions?
1. Consider the following chemical equation describing
the reaction between sulfur dioxide and oxygen.
2SO2 (g) + O2(g) → 2SO3(g)
Given the following container as
representing the final condition:
Which of the containers (-->) best
represents the initial conditions?
2. Which of the following changes can be described by
the balanced chemical equation,
A2(g) + 3B2(g) → 2AB3(g)
A) I only
B) II only
C) I and III
D) II and III
E) I, II and III
3. Which of the chemical equations best describes the
reaction represented by the containers below? Consider
the container label ‘initial condition’ as the reactants
before any reaction has occurred, and the container
labeled ‘final condition’ as the same container after the
reaction has reached completion.
A)
B)
C)
D)
E)
4A2(g) + 7B2(g) → 4AB3(g)
4A2(g) + 7B2(g) → 4AB3(g) + 1B2(g) + 2A2(g)
A2(g) + 3B2(g) → 2AB3(g)
4A2(g) + 6B2(g) → 4AB3(g)
A2(g) + B2(g) → AB3(g)