Part A
If a solution of HF (Ka=6.8×10−4) has a pH of 2.80, calculate
the concentration of hydrofluoric acid.
Express your answer using two significant figures.
n = mol
Part A
If a solution of HF (Ka=6.8×10−4) has a pH of 2.80, calculate
the concentration of hydrofluoric acid.
Express your answer using two significant figures.
n = mol
Part A: Calculate the pH of a
0.316 M aqueous solution of hydrofluoric
acid (HF, Ka =
7.2×10-4) and the equilibrium
concentrations of the weak acid and its conjugate base.
pH=? [HF]equilibrium= ? [F-]equilibrium= ?
Part B:Calculate the pH of a
0.0193 M aqueous solution of chloroacetic
acid (CH2ClCOOH, Ka
= 1.4×10-3) and the equilibrium
concentrations of the weak acid and its conjugate base.
pH=?
[CH2ClCOOH]equilibrium = ?
[CH2ClCOO-
]equilibrium = ?
A 25.0 mL buffer solution is 0.350 M in HF and 0.150 M in NaF.
Calculate the pH of the solution after the addition of 37.5 mL of
.200 M HCl. The pKa for HF is 3.46.
A 1.50 L buffer solution is 0.250 M in HF and 0.250 M in NaF.
Calculate the pH of the solution after the addition of 0.0500 moles
of solid NaOH. Assume no volume change upon the addition of base.
The Ka for HF is 3.5 × 10-4.
Calculate the pH of a 0.0152 M aqueous solution
of nitrous acid (HNO2,
Ka = 4.6×10-4) and the
equilibrium concentrations of the weak acid and its conjugate
base.
pH
=
[HNO2]equilibrium
=
M
[NO2-
]equilibrium
=
M