1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Natali5045456 [20]
3 years ago
13

An unknown triprotic acid (H3A) is titrated with NaOH. After the titration Ka1 is determined to be 0.0053 and Ka2 is determined

to be 1.5e-07. The pH at the second equivalence point of the titration is measured as 8.469. What is Ka3 for this triprotic acid?
Chemistry
1 answer:
Savatey [412]3 years ago
6 0

Answer:

Ka3 for the triprotic acid is 7.69*10^-11

Explanation:

Step 1: Data given

Ka1 = 0.0053

Ka2 = 1.5 * 10^-7

pH at the second equivalence point = 8.469

Step 2: Calculate Ka3

pKa = -log (Ka2) = 6.824

The pH at the second equivalence point (8.469) will be the average of pKa2  and pKa3. So,

8.469 = (6.824 + pKa3) / 2

pKa3 = 10.114

Ka3 = 10^-10.114 = 7.69*10^-11

Ka3 for the triprotic acid is 7.69*10^-11

You might be interested in
What is the total number of atoms in the molecule
serg [7]

Answer:

Sulfuric acid contains 2 hydrogen atoms, 1 sulfur atom, and 4 oxygen atoms.

Explanation:

8 0
3 years ago
What is the percent by mass of water in Na2SO4 • 10H2O?
bulgar [2K]
We determine the percent by mass of water in the compound by dividing the mass of  water by the total mass. The total mass of Na2SO4.10H2O is equal to 322 g. The mass of water is 180 g. 
       
                    percent by mass of water = (180 / 322)*(100 %) = 55.9%
5 0
3 years ago
Read 2 more answers
A ___________________ is a combination of two or more atoms that are held together by covalent bonds.
Andre45 [30]
The answer is Molecule
3 0
3 years ago
Read 2 more answers
The hole in the ozone layer can lead to increases in skin cancer.<br> a. True<br> b. False
Likurg_2 [28]
A. True. The ozone layer is very critical to our health.
6 0
3 years ago
Read 2 more answers
The table shows the number of atoms of different elements that make up molecules of four compounds. Which compound has the chemi
Ann [662]

umm what?

................

4 0
3 years ago
Other questions:
  • Atoms of elements with the same electron configuration are organized in ____ in the periodic table.
    10·1 answer
  • Cu(NO3)2 + Zn (s) → Cu (s) + Zn(NO3)2 is an example of which type of reaction?
    5·1 answer
  • The equilibrium concentrations of the reactants and products are [HA]=0.280 M, [H+]=4.00×10−4 M, and [A−]=4.00×10−4 M. Calculate
    15·1 answer
  • What is the equilibrium equation for the dissociation of formic acid in water? hcooh (aq) + h2o (l) ⇌ h3o+ (aq) + hcoo- (aq)?
    8·1 answer
  • The basic building blocks of proteins are:<br> O amino acids<br> O aldehydes<br> O amides<br> ODNA
    10·2 answers
  • A force of 30 N is applied to a screwdriver to pry the lid off of a can of paint. The screwdriver applies 75 N of force to the l
    11·1 answer
  • How can the conductivity of a salt solution be decreased?
    5·1 answer
  • What is the definition of an Isomer?
    12·2 answers
  • What is the name of this molecule?
    5·2 answers
  • 23 grams of sodium reacts with 293 cm 3 of water that is initially at 298 k. it produces an enthalpy change of 197 kj. what is t
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!