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
Anettt [7]
2 years ago
8

What is the molarity (molar concentration, unit = M) of K+ found in 200 mL 0.2 M K2HPO4 solution?

Chemistry
1 answer:
enyata [817]2 years ago
5 0

Answer:

0.4 M

Explanation:

The process that takes place in an aqueous K₂HPO₄ solution is:

  • K₂HPO₄ → 2K⁺ + HPO₄⁻²

First we <u>calculate how many K₂HPO₄ moles are there in 200 mL of a 0.2 M solution</u>:

  • 200 mL * 0.2 M = 40 mmol K₂HPO₄

Then we <u>convert K₂HPO₄ moles into K⁺ moles</u>, using the <em>stoichiometric coefficients</em> of the reaction above:

  • 40 mmol K₂HPO₄ * \frac{2mmolK^+}{1mmolK_2HPO_4} = 80 mmol K⁺

Finally we <em>divide the number of K⁺ moles by the volume</em>, to <u>calculate the molarity</u>:

  • 80 mmol K⁺ / 200 mL = 0.4 M
You might be interested in
Which set of procedures and observations indicates a chemical change?
Flauer [41]
The answer is (4), (3) is merely a change in composition, thus not chemical but physical.

Answer: (4).
4 0
2 years ago
Name the compound that makes up the white ring
Brut [27]

Answer:

ammonium chloride

Explanation:

if it's the white ring I think your talking abt

3 0
2 years ago
Read 2 more answers
Radiation is spontaneously emitted from hydrogen-3 nuclei, but radiation is not spontaneously emitted from hydrogen-l nuclei or
miv72 [106K]

Answer : Option 1) nuclei of H^{1} and nuclei of H^{2} only.


Explanation : Radiation is spontaneously emitted from nuclei of H^{3} because this isotope of hydrogen is highly radioactive as compared to other isotopes of hydrogen namely; nuclei of H^{1} and nuclei of H^{2}.


They have much stable nucleus as compared to nuclei of H^{3}.


The more it is unstable the more radiations will be emitted from its nucleus.

5 0
3 years ago
Read 2 more answers
What of the following is a Cation?<br> A) (SO3)^-2<br> B) sulfate<br> C) (Ca)^+2<br> D) chloride
Agata [3.3K]

Answer:c

Explanation:

I think because ca^+2

It’s loses the ion and if u look back u would see that a cation is a t charge but it’s not Goan that electron it’s losing that electron

4 0
3 years ago
What is the result at the end of meiosis II?
VMariaS [17]

Answer:

B.) two diploid cells

6 0
2 years ago
Other questions:
  • A reaction is moving most slowly when its reactant/product mix is: A. 90% product, 10% reactant B. 25% reactant, 75% product C.
    13·1 answer
  • What are the four main sources of fresh water on earth
    14·1 answer
  • All living creatures are from
    15·2 answers
  • The polyatomic ion with the formula CN- is called
    13·2 answers
  • What is (-1.7588 × 10^11 C/Kg)(1.309 × 10^-15 Kg)
    10·1 answer
  • PROBLEMS
    8·1 answer
  • What is the density of an aqueous solution that is 50.0% KOH by mass and has a KOH concentration of 13.39 M?
    5·1 answer
  • Propane is used as a fuel for camp stoves. It undergoes combustion to form carbon dioxide and water.
    6·1 answer
  • Please select the word from the list that best fits the definition Composed of one type of compound molecule compound mixture ch
    10·1 answer
  • Chemical formurla for Lithium Phsophide
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!