Classmates
Who is the IWE?
Bao
What is a covalent bond?
Chemical bond that occurs when atoms share electrons
What is a buffer?
A buffer is a solutions of a weak conjugate acid-base pair that resist drastic changes in pH
This equation is used to calculate the pH of buffer solutions based on the ratio of a weak acid and its conjugate base.
Henderson-Hasselbalch equation
What does I in a ICE table stand for?
Initial concentration
Who has a pink Owala?
Lina
What is the difference between endothermic and exothermic reactions?
Endothermic absorbs heat, exothermic releases heat
What equation is used to calculate the pH of a buffer solution?
The Henderson Hasselbach equation
The equation includes this logarithmic function, which accounts for the ratio of conjugate base to weak acid.
log([A⁻]/[HA])
In an ice table this variable represents the amount by which concentrations change as equilibrium is established
X
Who is the least blind out of us?
Wei
What is entropy change?
The measure of disorder or randomness in a system
In a titration curve, the region where the pH changes the least upon the addition of acid or base corresponds to this point
Buffer region
If a buffer solution has equal amounts of acid and conjugate base, the pH is equal to this value.
pKa
When solving an ICE table for a strong acid or strong base, this assumption can be made about dissociation
Complete dissociation
Who has been to Korea?
Gary
Keq includes these phases of reactants and products
Gases and aqueous solutions
The pH of a buffer solution is equal to this value when the concentrations of acid and its conjugate base are equal
pKa
This property of a buffer solution allows it to resist drastic changes in pH when small amounts of acid or base are added
buffering capacity
If Ka is very small, this simplifying assumption can be made when solving for x in an ice table
Assume x is very small
When is Mirek's Birthday?
August 27th (08/27)
What does a negative ΔH indicate
It indicates that the reaction is exothermic
A buffer solution is most effective when the ratio of acid to conjugate base falls within this range
0.1 to 10
The Henderson-Hasselbalch equation can be derived from this fundamental equilibrium expression, which describes acid dissociation.
Ka expression (acid dissociation constant equation)
Ka is calculated using these concentrations from an ICE table
Equilibrium concentrations of H3O+, A-, and HA