Formulas/Abbreviations
What are the acid/base dissociation constants?
Ka
What is little p
-log
What is the only thing that can change Ka or Kb?
Temperature
A solution of a weak acid "HA" is made up to be 0.15M. Its pH is 2.96. Calculate Ka.
1. Balance equation
2. Calculate [H+] using 10^-pH
3. Ice table
4. Solve using Ka expression
Answer: 8.7e-6
How do you know when x is negligible
When x is less than 5% in magnitude of the value it is being compared to
Ka dissociation formula
[H+][A-]/[HA]
What is percent ionization?
Fraction of acid molecules that dissociate compared with the initial concentration.
A strong acid will have a Ka value of (less than/greater than) 1?
Greater than
A solution of a weak acid "HA" is made up to be 0.15M. Its pH is 2.96. Calculate percent ionization.
0.73%
What are the only phase(s) that are included in the dissociation constant equation
Aqueous and gas
[BH+][OH-]/[B]
What is a diprotic/triprotic acid?
Acids with 2 Hs or 3 Hs (Ex: H2SO4, H3PO4)
A strong acid will have a (small/large) pKa?
Small
Do the activ
I'm not typing a whole problem
True or False? In stepwise dissociation problems, every step after the first is negligible
True
Given pH, how would you solve for x?
[H+]/[OH-] = 10^-pH
What is a polyprotic acid?
Acids that can lose more than 1 H+ ion
What is the first thing you must always do when solving a problem with weak acids/bases?
Write the balanced equation
What's f'(x) of f(x)=4x^5
20x^4
Does Ka follow the same rules as Keq
Yas
Percent ionization formula
([H3O+]/HAi)100%
What is stepwise dissociation?
When acids dissociate one step at a time. The Ka gets smaller after each step.
Which comes to a state of equilibrium? Weak acids or strong acids?
Why is Angelina so beautiful?
Everything besides what Hidaya says is true
What is this lecture about
Weak acids/bases, polyprotic acids