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
miskamm [114]
3 years ago
11

An unknown triprotic acid (H3A) is titrated with NaOH. After the titration Ka1 is determined to be 0.0013 and Ka2 is determined

to be 6.5e-07. The pH at the second equivalence point of the titration is measured as 8.181. What is Ka3 for this triprotic acid
Chemistry
1 answer:
e-lub [12.9K]3 years ago
7 0

Answer:

6.68 X 10^-11

Explanation:

From the second Ka, you can calculate pKa = -log (Ka2) = 6.187

The pH at the second equivalence point (8.181) will be the average of pKa2  and pKa3. So,

8.181 = (6.187 + pKa3) / 2

Solving gives pKa3 = 10.175, and Ka3 = 10^-pKa3 = 6.68 X 10^-11

You might be interested in
What is the measurement 1043. L rounded off to two significant figures?
Sloan [31]

Answer:

1000L

Explanation:

the 1 is a sig fig and since the 0 is between the 1 and 4 its also a significant number. to round them off you look at the 0,then look back at the 4 since its less than 5 u round down. then u replace the 43 with 0's

3 0
3 years ago
What types of chemical bonds?​
DaniilM [7]

Answer:

I am confused as to what you're asking.

7 0
3 years ago
J5 protons and 74 electrons
Brrunno [24]

Answer:

ins the same

Explanation:

neutrons have no charge

8 0
3 years ago
Pepsi has a density of 1.06 g/mL. It has a mass of 370 g. What is the volume of the can of Pepsi?
Ulleksa [173]

Answer:

<h3>The answer is 320.75 mL</h3>

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

volume =  \frac{mass}{density}  \\

From the question we have

volume =  \frac{340}{1.06}  \\  = 320.7547169...

We have the final answer as

<h3>320.75 mL</h3>

Hope this helps you

5 0
3 years ago
Select the item(s) that are organs in either a plant or human
Nataly_w [17]
Plant: leaf tissue
Human: lungs
3 0
3 years ago
Other questions:
  • What best describes the collision between ideal gas molecules
    5·1 answer
  • Is Oxygen - O2 a pure substance or a mixture?
    12·1 answer
  • What is the molar mass of carbon (C)?
    7·2 answers
  • Explain why igneous rocks do not contain fossils.
    11·2 answers
  • Balance the following:<br> _H2SO4 + _NaNO2 → _HNO2 + _Na2SO4
    5·2 answers
  • PWEASE REVIEW ME AND ME MATES TEEF
    15·1 answer
  • Why does spring tides occur
    9·1 answer
  • The alchemists were the first to do what?
    10·1 answer
  • A 400g sample is found to be 27% aluminum. What is the mass percent of A1 in the sample?
    11·1 answer
  • 1. How many joules of heat are necessary to melt 500 g of ice at its freezing point?
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!