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
Svetach [21]
4 years ago
6

As a technician in a large pharmaceutical research firm, you need to produce 300. mL of 1.00 M a phosphate buffer solution of pH

= 7.36. The pKa of H2PO4− is 7.21. You have 2.00 L of 1.00 M KH2PO4 solution and 1.50 L of 1.00 M K2HPO4 solution, as well as a carboy of pure distilled H2O. How much 1.00 M KH2PO4 will you need to make this solution?
Chemistry
1 answer:
tamaranim1 [39]4 years ago
4 0

Answer:  pH = 7.36. The pKa of H2PO4− is 7.21.

Explanation:

You might be interested in
What are the limitations of descriptive investigations
mestny [16]
Limitations<span> and </span>Disadvantages<span>: Participants or subjects may not be truthful or may not behave naturally when they know they are being observed. </span>Descriptive<span> studies cannot be used to correlate variables or determine cause and effect. Confidentiality can be an issue.

</span>
6 0
4 years ago
What is the relationship between the values of wavelength , frequency, and energy of electromagnetic waves
inn [45]
With an EM wave, the higher the frequency is, the higher the energy but also the lower the wavelength. If a wave has a low frequency, it will have a high wavelength but also low energy. An example is a radio wave. A high frequency, high energy (but low wavelength) wave like gamma or UV are also ionising which means they have enough energy to knock electrons off atoms.
7 0
3 years ago
A sample of gas in a balloon has an initial temperature of 21 ∘C and a volume of 1310 L . If the temperature changes to 70 ∘C ,
bixtya [17]

Answer:

1528.3L

Explanation:

To solve this problem we should know this formula:

V₁ / T₁ = V₂ / T₂

We must convert the values of T° to Absolute T° (T° in K)

21°C + 273 = 294K

70°C + 273 = 343K

Now we can replace the data

1310L / 294K = V₂ / 343K

V₂ = (1310L / 294K) . 343K → 1528.3L

If the pressure keeps on constant, volume is modified directly proportional to absolute temperature. As T° has increased, the volume increased too

7 0
4 years ago
While camping, you make a snack over a campfire. You roast a marshmallow over the campfire until it is browned and put it betwee
pshichka [43]

Answer:

It is <u>melting</u> which is a physical change.

Explanation:

.

6 0
3 years ago
Read 2 more answers
29.0 argon combine completely with 4.30 g of Sulfur.
Iteru [2.4K]

Answer:

33.3

Explanation:

if we were to add 29.0 of argon and 4.30 of sulfur and that would come out 33.3.

8 0
3 years ago
Other questions:
  • Please Help I need this to be done by today. There is a big reward if you get it right.
    12·1 answer
  • Onetaq standard reaction buffer fungal metagenomics
    15·1 answer
  • Milk is an example of a (1 point) solution. homogeneous mixture. colloid. compound
    7·1 answer
  • Which compound has the strongest hydrogen bonding between its molecules?
    6·1 answer
  • A balloon that had a volume of 3.50 L at 25.0°C is placed in a hot room at 40.0°C. If the pressure remains constant at 1.00 atm,
    15·2 answers
  • Why is the study of crime difficult?
    7·2 answers
  • what is the concentration of NaCl in solution made by mixing 25.0 mL of .100 M NaCl with 75.0 mL of .175 M NaCl
    13·1 answer
  • 2. The process where two light nuclei combine together releasing vast amounts of energy is called _____.
    11·1 answer
  • Write 2 paragraphs on how perfluorocarbon affects scuba divers and their bloodstream.
    7·1 answer
  • Name one strength and weakness about your volcano expeirment.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!