Mole Conversions
2Al + 6HCl ---> 2AlCl3 + 3H2
How many Moles HCl are needed to react with 2.4 Moles Al?
7.2
Oxidation # of Fe in FeCl2
2+
Reaction rate increases by:
An increase in Temperature,
An increase in Reactant Concentration,
An increase in pressure,
Presence of a catalyst
What is an exothermic reaction?
Heat on the reactants or products side?
Product! (- delta H)
Decreasing temperature will:
H3O(g) + 3 CO(g) <=> CO2(g) + OH(l) + Heat
Shift the equilibrium right/to products
How many grams O2 are needed to react with 25.0 moles of C10H8?
C10H8 + 12O2 ---> 10CO2 + 4H2O
9.60 x 10^3
What are the Oxidation #'s in a polyatomic ion equal to?
0!
What is the activation energy and how is it reduced?
The peak of reaction-reactants. Reduced by a catalyst.
What is entropy?
Disorder of a system!!
Remove H3O will cause:
H3O(g) + 3 CO(g) <=> CO2(g) + OH(l) + Heat
A shift left/to reactants
How many grams NaCN can be produced from 174 grams Ca(CN)2?
Ca(CN)2 + 2NaCl ---> CaCl2 + 2NaCN
185 g
Oxidation number of Ca2Mn2S7
+5
What does a small Kc mean?
Reactants are favored and the equilibrium lies to the left!
2H2O(l) + CCl4(aq) --> 3O2(g)+ HCl(g) + 2CO(g)
5 HCl(g) + 6CO2(g) ---> 5 H2O(l) + 6 CCl(l)
2O2(g) + H2(g) ---> 2OH(g)
Which has a Delta S > 0?
2H2O(l) + CCl4(aq) --> 3O2(g)+ HCl(g) + 2CO(g)
(Points away from reactants, to products!)
Increasing Pressure:
2OH(g) + CO2(g) <=> H3O(g) + 7O2(g)
shift left/to reactants
What is the equation for percent yield?
If the actual yield is 134g Al and the percent yield is 60.5%, what is the theoretical yield?
Actual/Theoretical x 100%
221g Al
Ox # of C in CS23-
1+
The products go on the bottom in an Equilibrium Constant, using subscripts as their powers.
True or False?
Which results in a reaction never being spontaneous?
+ change in H, + change in S
- change in H, - change in S
+ change in H, - changed in S
- change in H, + change in S
+ change in H, - changed in S
Results in a + delta G every time!
Increasing concentration of CCl2:
HCl2(g)+CO2(g) <=> CCl2(aq) + 4 H2O(l)
Does CCl2 increase or decrease?
Shift to left/reactants
CCl2 increases, right side of reaction decreases.
When 50.0g copper was reacted with silver nitrate solution, 148 g of silver (Ag) was obtained. What is the percent yield of Ag obtained?
Cu + 2AgNO3 ---> Cu(NO3)2 + 2Ag
87.1%
What are the reducing and oxidizing agents in:
2KClO4 ------> KCl + 2O2
Oxygen = reducing agent
Cl = oxidizing agent
Kc if KCLO4 = 2.4M, KCL = 1.2M, and O2 = .86
2KClO4 ------> KCl + 2O2
.16
How do you find the change in H or the change in G from a graph?
Free energy change equation: Change G = Change in H - T(Change in S)
True or False?
Products - Reactants! Always!
True!
HCl2(g)+CO2(g) <=> CCl2(aq) + 4 H2O(l)
(This equation has a - delta H)
Does entropy increase towards products?
Will decreaseing temperature will shift equillibrium to the left?
What will increasing the amount of H2O do?
No
No
Shift left/to reactants