Tryptophan (HW) is a diprotic amino acid with Ka1 = 4.3 × 10-3
and Ka2 = 4.7 × 10-10. Determine the pH of the following
solutions.
A) 0.214 M tryptophan hydrochloride (H2W Cl–)
B) 0.214 M tryptophan (HW)
C) 0.214 M sodium tryptophanate (Na W–)
Oxalic acid , HOOCCOOH, is a diprotic acid with Ka1= 0.056 and
Ka2=1.5x10-4. Determine the equilibrium [HOOCCOOH] in a solution
with an initial concentration of 0.116 M oxalic acid
. HOOCCOOH = HOOCCOO- + H+
HOOCCOO- = -OOCCOO- + H+
Oxalic acid , HOOCCOOH (aq) , is a diprotic acid with Ka1= 0.056
and Ka2=1.5x10-4. Determine the pH of a 0.12 M oxalic acid
solution.
HOOCCOOH(aq) = HOOCCOO-(aq) +
H+(aq) HOOCCOO-(aq) = -OOCCOO-(aq) + H+(aq)
Ascorbic acid( C6H8O6) is a diprotic acid. (ka1=6.8*10^-5,
ka2=2.7*10^-12)
What is the pH of a solution that contains 4.4 mg of acid per
milliliter of solution?
For the diprotic weak acid H2A, Ka1 = 3.2 × 10^-6 and Ka2 = 8.0
× 10^-9. What is the pH of a 0.0600 M solution of H2A? What are the
equilibrium concentrations of H2A and A2– in this solution?
Please show work.
For the diprotic weak acid H2A, Ka1 = 2.5 × 10-6 and Ka2 = 5.5 ×
10-9. What is the pH of a 0.0800 M solution of H2A? What are the
equilibrium concentrations of H2A and A2– in this solution?
For the diprotic weak acid H2A, Ka1 = 3.3 × 10-6 and Ka2 = 8.2 ×
10-9.
What is the pH of a 0.0400 M solution of H2A?
What are the equilibrium concentrations of H2A and A2– in this
solution?
pH =
[H2A] =
[A2-]=
For the diprotic weak acid H2A, Ka1 = 3.4 × 10-6 and Ka2 = 8.2 ×
10-9. What is the pH of a 0.0800 M solution of H2A? What are the
equilibrium concentrations of H2A and A2– in this solution?
For the diprotic weak acid H2A, Ka1 = 3.1 × 10-6 and Ka2 = 6.6 ×
10-9. What is the pH of a 0.0700 M solution of H2A? What are the
equilibrium concentrations of H2A and A2– in this solution?
pH=
[H2A]=
[A^2-]=
For the diprotic weak acid H2A, Ka1 = 2.8 × 10-6 and Ka2 = 8.7 ×
10-9. What is the pH of a 0.0500 M solution of H2A? What are the
equilibrium concentrations of H2A and A2– in this solution?