In this worksheet, we will practice calculating concentrations of species for polyprotic acids, where multiple equilibria exist.
Q1:
Hydrogen telluride is a diprotic acid with = and = . For a 0.1 M solution of , approximately how many orders of magnitude lower is the change in caused by the second dissociation relative to the first dissociation?
- A3
- B1
- C6
- D10
- E15
Q2:
Nicotine is a base that can accept a maximum of two protons, with values of and . The initial concentration of nicotine in an aqueous solution is 0.050 M.
Calculate .
- A M
- B M
- C M
- D M
- E M
Calculate .
- A M
- B M
- C M
- D M
- E M
Q3:
Soda water (carbonated water) is a solution of carbon dioxide in water. The solution is acidic because reacts with water to form carbonic acid, :
In a saturated solution of , is initially 0.033 M before dissociation takes place.
Calculate at equilibrium.
- A M
- B M
- C M
- D M
- E M
Calculate at equilibrium.
- A M
- B M
- C M
- D M
- E M
Q4:
Calculate the value of in a 0.010 M solution of phthalic acid, .
- A M
- B M
- C M
- D M
- E M