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
Vlad1618 [11]
3 years ago
8

Here is a more complex redox reaction involving the dichromate ion in acidic solution: 3N O 2 − + 8H + + C r 2 O 7 2− → 3N O 3 −

+2Cr 3+ + 4 H 2 O Classify each reactant as the reducing agent, oxidizing agent, or neither.
Chemistry
1 answer:
Fantom [35]3 years ago
4 0

Answer:

NO2- is the reducing agent.

Cr2O7_2- is the oxidizing agent.

H+ is neither

Explanation:

Reduction is the gain in electron. A chemical specie that undergoes reduction is called the oxidizing agent.

Oxidation is simply the loss in electrons. A chemical specie that undergoes oxidation is called the reducing agent.

Let us look at the species.

The first specie is the NO2-. In this specie, the oxidation number of nitrogen changed from +3 to +5 in NO3-. Thus we can see that there is more loss of electron to have caused an increase in the oxidation number positively. This shows an oxidation. Hence, NO2- is the reducing agent.

Let us look at the chromium. We can see that the oxidation number of chromium changed from +7 to +3.

Now we can see that it is a decrease and hence, it is a gain of electron and thus it is reduction. This means the first chromium specie is the oxidizing agent.

The hydrogen ion is simply placed there to balance the ions and hence it is neither the oxidizing nor the reducing agent.

You might be interested in
Write the structural formula for m-chlorophenyl ethyl ether.
Sliva [168]

Answer: C(OCH2CH3)CHCClCH(CH)2

Explanation:

The structural formula for m-chlorophenyl ethyl ether is

C(OCH2CH3)CHCClCH(CH)2.

The structural formula shows the step-by-step linkages.

4 0
3 years ago
An element is a mixture of two isotopes.one isotope has an atomic mass of 34.969 amu and an abundance of 64.88
skad [1K]

An element is a mixture of two isotopes. One isotope has an atomic mass of 34.969 amu and an abundance of 64.88%. The other isotope has an atomic mass 36.966 amu.


5 0
3 years ago
As salinity increases:
Mashcka [7]

Answer: Option (d) is the correct answer.

Explanation:

The amount of salt present or dissolved in water or water body is known as salinity.

When salinity increases then number of particles increases, therefore, density will increase. Also, number of ions will decrease thus, electrical conductivity will decrease.

On the other hand, increase in salinity will increase the amount of salt (NaCl) is the water.

Thus, we can conclude that out of the given options, the option all of the above is true.

8 0
3 years ago
Water is capable of dissolving a variety of different substances, which is why it is such a good solvent. It is often called the
Serggg [28]

Answer:

Explanation:

In this case the answer would be

Water is a polar molecule with positive and negative side

Now since these negative and positives are present in the water molecule . In easy terms when a substance reacts with water .the negative part of water ( oxygen ) reacts with the positive part of the substance and the positive part of the water ( hydrogen) reacts with negative part of the substance .if you look at the reason . Water is held up by one of the strongest attraction forces available .since most substances have weaker attraction forces between them ,therefore water can easily overcome them with its forces. Thus giving it the ability to dissolve a variety of substances

6 0
3 years ago
Which of the following examples of erosion would occur most quickly?
anyanavicka [17]

Answer: OC

Explanation:

The Others Could Take Many Millions Of Years

8 0
3 years ago
Other questions:
  • C. Is curium (Cm) radioactive or not radio active? Why? <br><br> Why is curium radioactive?
    14·1 answer
  • Which of the following is true? A. Lithium is the least reactive element in group 1, because it is the smallest and holds its va
    10·1 answer
  • Which of these pairs is in Kingdom Fungi?
    13·2 answers
  • Now take a fresh 60 mL of the 0.50 M pH 6.83 buffer and add 3.7 mL of 1.00 M NaOH. Using steps similar to those above, calculate
    5·1 answer
  • What are the two roles that the pancreas plays?
    14·2 answers
  • A buffer solution is 0.310 M in H2SO3 and 0.304 M in NaHSO3. If Ka1 forH2SO4 is 1.7e-2 , what is the pH of this buffer solution
    14·1 answer
  • PLEASE HELP ME! VERY IMPORTANT<br> SEE ATTACHED
    12·1 answer
  • In which of the following is the number of neutrons correctly represented
    14·1 answer
  • This is my cookie &gt;:( you cannot have it
    10·1 answer
  • choose the true statement(s) about ions. to be marked correct, you’ll need to select all true statements, as there may be more t
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!