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
ikadub [295]
4 years ago
5

Which equation describes the half-reaction that occurs at the cathode during the electrolysis of water? 4h+(aq + 4oh–(aq ? 4h2o(

l 2h2o(l ? 2h2(g + o2(g o2(g + 4h+(aq + 4e– ? 2h2o(l 2h2o(l + 2e– ? h2(g + 2oh–(aq?
Chemistry
2 answers:
iren [92.7K]4 years ago
5 0

Answer: 2H_2O(l)+2e^-\rightarrow H_2(g)+2OH^-(aq)

Explanation :

Electrolysis of water is defined as decomposition of water into oxygen gas and hydrogen gas due to the passage on an electric current. In electrolytic cell oxidation occurs at anode and reduction occurs at cathode. At anode we will get oxygen gas and at cathode we will get hydrogen gas.

Half reaction at anode:

2H_2O(l)\rightarrow O_2(g)+H^+(aq)+4e^-..(1)

Half reaction at cathode:

2H_2O(l)+2e^-\rightarrow H_2(g)+2OH^-(aq)..(2)

Overall reaction:(1)+(2)

2H_2O(l)\rightarrow H_2(g)+O_2(g)

laila [671]4 years ago
4 0
Electrolysis of water involves the decomposition of water into oxygen and hydrogen gas by passing an electric current through water. The positively charged ion (hydrogen ion) moves to the negative electrode (cathode) during electrolysis, while the negatively charged ion (OH-) moves to the positive electrode (anode). Therefore, the half equation that occurs at the cathode during the electrolysis of water will be; 
4H+(aq) + 4e- = 2H2 (g)
You might be interested in
Hemoglobin has a much greater affinity for carbon monoxide than oxygen. which principle explains why a hyperbaric chamber (conta
babunello [35]

Hemoglobin has a much greater affinity for carbon monoxide than oxygen. In a hyperbaric chamber (containing high levels of oxygen) can treat carbon monoxide poisoning, by displacing carbon monoxide from Hemoglobin competitively.

Hemoglobin has a much greater affinity for carbon monoxide than oxygen. This is because, a coordinate bond is formed with Carbon monoxide and Haem structure of the hemoglobin.

Carbon monoxide with Hemoglobin is called as Carboxy haemoglobin.

Presence of oxygen displaces the Carbon monoxide with Hemoglobin that is formed due to poisoning.

Hyperbaric chamber is a chamber which contains pure oxygen in a chamber. The atmospheric pressure is kept about three to four times than the normal, such that the replacement of Carbon monoxide from Haem can occur as fast as possible since this reduces the half life of the Carboxy haemoglobin.

It is advisable not to treat Carbon monoxide poisoning yourself.

Hyperbaric oxygen is used to treat the following conditions as well:

  • Infections
  • Wounds
  • Air bubble is blood

Learn more about Carbon Monoxide here, brainly.com/question/11313918

#SPJ4

3 0
2 years ago
Phases of matter <br> Soild<br> *<br> *<br> *<br> Liquid<br> *<br> *<br> *<br> Gas <br> * <br> *
Annette [7]
Strawberry, bread, bananas/ lemonade, milk, water/ nitrogen, oxygen, carbon dioxide
3 0
3 years ago
How many grams of a solution that is 5.2% sucrose by mass are needed to obtain 18g of sucrose
kirill115 [55]

Answer:

346.g of solution

Explanation:

In this case, if we have 5.2 % by mass it means that in <u>100 g of the solution we will have 5.2 g of glucose</u>. Therefore we can do the calculation:

<u>5.2 g of glucose = 100 g of solution</u>

18~g~of~glucose\frac{100~g~of~solution}{5.2~g~of~glucose}=346.15~g~of~solution

So, if we need 8 g of glucose we had to have 346.15 g of solution

This logic can work for all types of solutions. By mass (as in this case), by volume or mass/volume.

I hope it helps!

3 0
4 years ago
During human development, certain cells of the blastocyst can develop into
lidiya [134]

Answer:

Embryonic stem cells are pluripotent, meaning they can give rise to every cell type in the fully formed body, but not the placenta and umbilical cord. ... Human embryonic stem cells have been derived primarily from blastocysts created by in vitro fertilization (IVF) for assisted reproduction that were no longer needed

Explanation:

8 0
4 years ago
The alkali metals play virtually the same general chemical role in all their reactions. (b) How is it based on atomic properties
vfiekz [6]

b) It is based on atomic properties as alkali metals requires 7 more electrons to complete their outer orbit. And they try to give those electrons to other elements to obtain noble gas configuration.

Noble gases are the gases which do not react easily with anything. They are also called as Inert gases, and belongs to group 18 of the periodic table.

Alkali metals are the substances which are found in Group I of a periodic table. Mostly the elements which are present are:

  • Lithium (Li)
  • Sodium (Na)
  • Potassium (K)
  • Rubidium (Rb)
  • Cesium (Cs)
  • Francium (Fr)

Properties of alkali metals are:  Soft, shiny reactive metals. They are soft enough to cut with knife. Metals react with water and air quickly and gets tarnish, so pure metals are stored in container by dipping them in oil to prevent oxidation.

To know more about Alkali metals, refer to this link:

brainly.com/question/18153051

#SPJ4

6 0
2 years ago
Other questions:
  • Which of the following people would most often use chemistry in their work?
    7·1 answer
  • Why might people want to study different rocks and minerals?
    7·1 answer
  • What is a chemical change?
    13·2 answers
  • Which equation was used by Albert Einstein to explain the photoelectric effect? [E = energy, h = Planck’s constant, and v = freq
    9·1 answer
  • Calcium carbonate is a type of hydrogenous sediment that can be buried and hardened into _____.
    6·1 answer
  • Read “The Ozone Hole” and answer the question below. Write a short evaluation of the article’s reliability and scientific worth.
    14·2 answers
  • Where does the ocean get the most intense heat from the sun .
    11·2 answers
  • A resistor is a device the speeds up the flow of current. True or False​
    5·1 answer
  • What is the age for rock layer C?
    10·2 answers
  • 200g of solution of magnesium
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!