Acids + Bases
a) HClO/HClO2
b) H2PO4-/HPO42-
c) H3O+/OH-
d) NCl3/NCl2-
b) H2PO4-/HPO42-
What is the expression for Ka for this reaction?
HCO3- + H2O (l) <-> CO32- + H3O+
Ka = [CO32-][H3O+]/[HCO3-]
Which 0.10 M solution will have the largest concentration of hydroxide ion?
a) NH3 (Kb = 1.8 x 10-5)
b) NaCN (Ka = 4.9 x 10-10)
c) NaClO2 (Ka = 1.7 x 10-4)
d) NaHCO3 (Kb = 2.3 x 10-8)
b) NaCN (Ka = 4.9 x 10-10)
a) 1.0 x 10-14 M
b) 6.3 x 10-8 M
c) 1.0 x 10-7 M
d) 1.6 x 10-7 M
d) 1.6 x 10-7 M
Who was cast as Catherine Earnshaw in the Wuthering Heights movie adaptation?
Margot Robbie
Which statement is true about Lewis acids and bases?
a) A Lewis acid must have a nonbonding pair of electrons
b) A Lewis base must have a nonbonding pair of electrons
c) In a Lewis acid-base reaction, a pair of electrons is donated from the acid to the base
d) In a Lewis acid-base reaction, one species always goes from having a charge to being electronically neutral
b) A Lewis base must have a nonbonding pair of electrons
Benzoic acid is a food preservative with a pKa of 4.20. Determine the Kb and pKb for the benzoate ion.
pKb = 9.80
Kb = 1.58 x 10-10
Which is the strongest acid in aqueous solution?
a) acetic acid (Ka = 1.8 x 10-5)
b) benzoic acid (Ka = 6.3 x 10-5)
c) formic acid (Ka = 1.7 x 10-4)
d) hydrofluoric acid (Ka = 7.1 x 10-4)
d) hydrofluoric acid (Ka = 7.1 x 10-4)
What is the pH of a 0.053 M solution of KOH at 25 degrees Celsius?
a) 0.89
b) 1.28
c) 12.72
d) 13.11
c) 12.72
Who did the US women's hockey team defeat for the gold medal in the 2026 Olympics?
Canada
In non-aqueous solution, the trend in acid strength is observed to be: HI > HBr > HCl. Which periodic trend best observes this observed pattern?
a) Atomic radius: as the bond between H and the halogen becomes shorter, acid strength decreases
b) Electron affinity: as the halogen becomes more attracted to electrons, acid strength increases
c) Electronegativity: as the bond between two atoms becomes less polar, acid strength decreases
d) Ionization energy: as it becomes harder to remove an electron from the halogen, acid strength increases
a) Atomic radius: as the bond between H and the halogen becomes shorter, acid strength decreases
Free points! :)
Free points!
What is the Kb of F-? (Ka of HF = 6.8 x 10-4)
a) 6.8 x 1010
b) 1.5 x 103
c) 6.8 x 10-4
d) 1.5 x 10-11
d) 1.5 x 10-11
Which pair could be used to make a buffer solution?
a) acetic acid and sodium chloride
b) acetic acid and sodium hydroxide
c) hydrochloric acid and potassium chloride
d) hydrochloric acid and sodium hydroxide
b) acetic acid and sodium hydroxide
Pink Pantheress had a remix of a song featuring Zara Larsson on what 2025 album?
Fancy Some More
Methyl orange is an indicator that changes color from red to yellow-orange over the pH range of 2.9 to 4.5. Methyl orange would be the most appropriate indicator for which type of acid-base titration?
a) a weak acid titrated with a strong base
b) a weak base titrated with a strong acid
c) a strong acid titrated with a strong base
d) methyl orange would not be an appropriate indicator for any acid-base titration
b) a weak base titrated with a strong acid
What is the pH of a 0.820 M aqueous NH3 solution? (Kb = 1.8 x 10-5)
a) 2.42
b) 9.25
c) 11.58
d) 13.91
c) 11.58
The pain reliever codeine is a weak base with a Kb = 1.6 x 10-6. What is the pH of a 0.05 M aqueous codeine solution?
a) 7.1
b) 10.5
c) 11.1
d) 12.7
b) 10.5
An acetate buffer contains equal volumes of 0.35 M HC2H3O2 (pKa = 4.74) and 0.55 M NaC2H3O2. What is the pH of the buffer?
a) 4.54
b) 4.74
c) 4.94
d) 7.00
c) 4.94
Who plays Zoro in the One Piece live action TV show?
Mackenyu
What volume (in mL) of 0.150 M NaOH (aq) is required to neutralize 25.0 mL of 0.100 M H2SO4?
a) 16.7 mL
b) 33.3 mL
c) 66.7 mL
d) 75.0 mL
b) 33.3 mL
What is the equilibrium concentration of nitrous acid (HNO2) (Ka = 4.5 x 10-4), in a solution that has a pH of 1.65?
a) 0.0032 M
b) 0.022 M
c) 0.49 M
d) 1.1 M
d) 1.1 M
What is the pH of a buffer solution containing equal volumes of 0.11 M NaCH3COO and 0.090 M CH3COOH? Ka = 1.8 x 10-5
a) 2.42
b) 4.83
c) 11.58
d) 13.91
b) 4.83
A 10.0 mL portion of 0.010 M HCl is added to 100.0 mL of water. What is the pH of the resulting solution?
a) between 3.02 and 3.10
b) between 2.90 and 3.01
c) between 2.02 and 2.10
d) between 1.90 and 2.01
a) between 3.02 and 3.10
What do Alysa Liu's 'halos' in her hair represent?
Growth; like tree rings