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
jonny [76]
3 years ago
11

What is the pH of a 0.28 M solution of ascorbic acid

Chemistry
1 answer:
Nady [450]3 years ago
3 0

Hey there!

Values Ka1 and Ka2 :

Ka1 => 8.0*10⁻⁵

Ka2 => 1.6*10⁻¹²

H2A + H2O -------> H3O⁺  + HA⁻

 Ka2 is very less so I am not considering that dissociation.

Now Ka = 8.0*10⁻⁵ = [H3O⁺] [HA⁻] / [H2A]

lets concentration of H3O⁺  = X then above equation will be

8.0*10−5 = [x] [x] / [0.28 -x

8.0*10−5 = x² /  [0.28 -x ]

x² + 8.0*10⁻⁵x  - 2.24 * 10⁻⁵

solve the quardratic equation

X =0.004693 M

pH = -log[H⁺]

pH = - log [ 0.004693 ]

pH = 2.3285

Hope that helps!

You might be interested in
3. After the isotope decays, what is the nucleus called?||
Marat540 [252]

Answer:

Daughter Nucleus

Explanation:

7 0
3 years ago
Why is the deuterium-tritium reaction the most promising nuclear fusion reaction for future energy production?
stepan [7]
The reactions produces an enormous amount of energy per unit mass compared to nuclear fission. Hope this helped
6 0
3 years ago
Read 2 more answers
A 9-ounce of glass contains 72 milligrams of vitamin
sleet_krkn [62]
Answer: 7.2 ounces


Explanation:



1) Data:

<span>- glass size: 9-ounce
</span><span>
</span><span>- content of vitamin C: 72 milligrams
</span><span>
</span><span>
</span><span>- glasssize: x
</span><span>
</span><span>- content of vitamin C: 60 milligrams
</span><span>
</span><span>
</span><span>2) Proportion
</span><span>
</span><span>
</span><span>9 ounces / 75 mg = x / 60 mg
</span><span>
</span><span>
</span><span>3) Solution:
</span><span>
</span><span>
</span><span>9 ounces × 60 mg = 75 mg × x
</span><span>
</span><span>
</span><span>⇒ x = 9 ounces × 60 mg / 75 mg = 7.2 ounces
</span>
7 0
3 years ago
What is the purpose of a
Vlada [557]

Answer:

B. Holding spores

Explanation:

B is the answer

3 0
2 years ago
Put the steps in the process of photosynthesis in order
shepuryov [24]

Step 1-Light Dependent

CO2 and H2O enter the leaf

Step 2- Light Dependent

Light hits the pigment in the membrane of a thylakoid, splitting the H2O into O2

Step 3- Light Dependent

The electrons move down to enzymes

Step 4-Light Dependent

Sunlight hits the second pigment molecule allowing the enzymes to convert ADP to ATP and NADP+ gets converted to NADPH

Step 5-Light independent

The ATP and NADPH is used by the calvin cycle as a power source for converting carbon dioxide from the atmosphere into simple sugar glucose.

Step 6-Light independent

The calvin cycle converts 3CO2 molecules from the atmosphere to glucose

calvin cycle

The second of two major stages in photosynthesis (following the light reactions), involving atmospheric CO2 fixation and reduction of the fixed carbon into carbohydrate.

4 0
3 years ago
Other questions:
  • What equation allows you to calculate the force on an object
    15·2 answers
  • Combustion _____.
    14·2 answers
  • A total of 0.829 L of hydrogen gas is collected over water at 33.0°C. The total pressure is 794 torr.
    14·1 answer
  • This is the normal nucleotide sequence on a DNA strand:
    14·2 answers
  • Which elements are part of the halogens group?
    15·1 answer
  • Please help me solve this USING DIMENSIONAL ANALYSIS! :
    14·1 answer
  • What is the formula for Disulfur Pentafluoride?
    12·1 answer
  • Please answer quick!!!
    6·1 answer
  • In order for sedimentary rock to form, which of the following must occur?
    6·1 answer
  • Gold (Au) should have an electron notation that ends in 6s24f145d9. To become more stable, the electrons in reality rearrange th
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!