Chem II Exam 3
Which of the following solutions is a good buffer system? A solution that is 0.10 M HI and 0.10 M NH4+ A solution that is 0.10 M NaOH and 0.10 M KOH A solution that is 0.10 M HBr and 0.10 M KC2H3O2 A solution that is 0.10 M HC2H3O2 and 0.10 M LiC2H3O2 None of the above are buffer systems.
A solution that is 0.10 M HC2H3O2 and 0.10 M LiC2H3O2 weak acid and conjugate base
Identify as an acid or a base: HCl
Acid
Identify as an acid or a base: NH4+
Acid
The following equation shows the equilibrium in an aqueous solution of ammonia: NH3(aq)+H2O(l)⇌NH4+(aq)+OH−(aq) Which of the following represents a conjugate acid-base pair?
H2O and OH(−)
What is the conjugate acid of HPO42− ?
H2PO4(−)
Which of the following is an Arrhenius acid? LiOH NH2CH3 CH3CCl3 H2SO4 More than one of these is an Arrhenius acid.
H2SO4
Write a chemical equation for HC2H3O2(aq) showing how it is an acid or a base according to the Arrhenius definition.
HC2H3O2(aq)+H2O(l)→H3O+(aq)+C2H3O2−(aq)
What is the conjugate acid of HCO3- ?
HCO31- is the conjugate acid of the base CO32-. H2O is the conjugate acid of the base OH1-. the conjugate base pair is *H2CO3*
Write a chemical equation for HCl(aq) showing how it is an acid or a base according to the Arrhenius definition.
HCl(aq)→H+(aq)+Cl−(aq)
What is the conjugate base of H2PO4- ?
HPO4^2-
Write a chemical equation for KOH(aq) showing how it is an acid or a base according to the Arrhenius definition.
KOH(aq)→K+(aq)+OH−(aq)
Which of the following is an Arrhenius base? H3OH NaBr CH3CO2H LiOH More than one of these compounds is an Arrhenius base.
LiOH
Write a chemical equation for NH4+(aq) showing how it is an acid or a base according to the Arrhenius definition.
NH4+(aq)→H+(aq)+NH3(aq)
What is the conjugate base of HSO4−?
SO4^(2)−
Identify as an acid or a base: hc2h3o2
acid
Identify as an acid or a base: KOH
base
What is the Henderson-Hasselbalch equation?
pH=pKa+log[base]/[acid]