2.1-2.6 Flashcards
(29 cards)
What type of reaction is this?
A + B → AB
Synthesis
What type of reaction is this?
AB → A + B
Decomposition
What type of reaction is this?
AB + C → AC + B
Single Replacement
What type of reaction is this?
AB + CD → AD + CB
Double Replacement
What type of reaction is this?
Acid + Base → Salt + Water
Neutralization
What type of reaction is this?
Hydrocarbon + Oxygen → Carbon Dioxide + Water
Combustion
What is the order to balancing chemical equations?
- Balance all the metals
- Balance all the non-metals (except H and O)
- Balance H
- Balance O
Does a Catalyst change the equilibrium point?
No.
What does a Catalyst do?
A catalyst is a substance that speeds up a chemical reaction, or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction.
What does Keq mean?
The equilibrium constant (general)
What does Kc mean?
The equilibrium constant specifically with respect to concentration.
What does Kp refer to?
The partial pressure of gas.
How do you tell if a reaction’s point of equilibrium will shift right or left?
If we add reactant, equilibrium goes right, away from the reactant. If we add product, equilibrium goes left, away from the product. If we remove product, equilibrium goes right, making product. If we remove reactant, equilibrium goes left, making reactant.
What does pH refer to?
How acidic or basic a substance is.
What is the value of pH that means the substance is neutral?
7
Adding pressure to a reaction will often make the reaction’s equilibrium point shift in which direction?
It often forces the reaction to speed up, and will shift towards the size with the smaller molar mass.
How does a reaction shift if you add volume?
If there is no difference in the volume of both sides, there will be no shift; however, if there is a greater volume, the reaction will shift towards the products and vice versa.
What does it mean if a substance has a high Ka value?
This means that the acid is strong, its going to dissociate more, and the concentration of H+ is going to be high at equilibrium.
What is the equivalence point?
The point in titration at which the amount of titrant added is just enough to completely neutralize the analyte solution.
With titrant graphs, what does it mean when the equivalence point is > 7?
Very basic, strong base
With titrant graphs, what does it mean when the equivalence point is < 7?
Very acidic, strong acid.
Where is the pKa located?
Halfway to the equivalence point.
If a titrant graph has a flat beginning, with a pH value of 7 at the eq. point, what does this mean?
The graph is showing a strong acid/strong base.
If the graph begins by curving upwards, and has a eq. point greater than 7, what does this mean?
Weak acid/strong base
