Labs
What are the names of all the labs? (Hint: All the labs listed on the Slideshow.)
Snowball Mini Lab, Equilibrium Mini lab, Equilibrium Lab
What is the equation for the equilibrium constant?
Keq = C^c + D^d/A^a + B^b
Keq = Product/Reactant
Would increasing the temperature favor Exothermic or Endothermic reactions?
Endothermic
What is Chemical Equilibrium?
When the forward and reverse reactions are equal.
Does k > 1 favor products or reactants?
It favors Products
Why did we make a control group test tube for the Equilibrium Lab (Hint: why are control groups important?)
To make a comparison when creating the other solutions
In an Equation which states of matter do you disregard?
Solid and Liquids
What does a decreasing concentration of reactants favor?
It favors the Products
What does the collision theory state?
A reaction occurs when particles collide with sufficient energy and proper alignment, speeding up the rate of reaction.
Daily Double!!! When do we use the term Kp? (Hint: different from K or Kc)
Kp = partial pressure of gases
What did the snowball lab teach us?
That when the Forward and reverse rates are equal, the equation will reach equilibrium.
Solve FeO(s) + CO(g) <=> Fe(s) + CO2(g)
CO = 0.20 mol/L
CO2 = 0.80 mol/L
If there is time solve on board
.80/.20 = 4
What does decreasing volume favor side with more molecules or the side with fewer molecules?
What does the Law of Mass Action state?
The rate of a chemical reaction is directly proportional to the concentrations of solutions or the partial pressure of gases.
What do the signs << and >> mean when referring to the equilibrium constant?
Much greater than & much less than
Daily Double!!!!!!! What did the Smaller beakers represent, and what is the purpose of what the beakers represent?
They represent Forward and reverse rates. And they decide when the reaction will reach Equilibrium.
When graphing an exothermic equation. Will it end higher or lower then when it started.
Lower
Which way will the equation shift if the temperature is increased?
N2 (g) + 2H2O (g) + heat <-> 2H2(g) + 2NO (g)
Right
What is Le Chatelier's principle?
If a system is disturbed by any force. Equilibrium will shift to counteract the disturbance.
What will occur when a catalyst is added at equilibrium?
Equilibrium will not change/No shift
What does the change in color (became lighter) in the test tube, after heating, tell us about which side the reactions shifted to? (Hint: the reactants reacting cause the dark color, and it is an exothermic reaction)
It tells us that the reaction shifted to the reactant side
Solve CaCO3 (s) + 2HCl(g)<=> CaCl2(s) + CO2(g) + H20(g)
HCl = 0.30 mol/L
CO2 = 0.50 mol/L
H2O = 0.40 mol/L
(.5*.4) / (.3^2) = 2.222
SiO2 (s) + 4HF (aq) <-> SiF4 (g) + 2H2O (l)
Which way will the equation shift if volume is increased?
Left or Reactants
What is kinetics?
The study of reaction mechanisms and rates of reactions.
What are the two numerical values that determine if something is >> and << (Hint: One is very big, the other is very small)
10^-5 & 10^5