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
g100num [7]
3 years ago
8

Which of the following represents the balanced reduction half-reaction from the redox reaction? (2 points)

Chemistry
1 answer:
-Dominant- [34]3 years ago
5 0

In general oxidation is defined as gain of oxygen or loss of electron or hydrogen by an atom. Reduction is defined as gain of electron or hydrogen or loss of oxygen by an atom.

In a balanced redox reaction we have two half reactions

a) reduction half reaction : the oxidation number of element decreases

b) oxidation half reaction : the oxidation number of element increases

Pb(s) + Pd(NO_{3} )_{2}(aq)---> Pb(NO_{3} )_{2}(aq)+ Pd(s)

The element undergoing reduction is Pd.

the oxidation number of Pd decreases from +2 to 0

Thus the reduction half reaction will be

Pd^{+2} + 2e- --->Pd(s)

The Pd (II) ion will take two electrons and will give Pd (0)

Answer is Pd^{+2} + 2e- --->Pd(s)

You might be interested in
What is the mass of water necessary to generate 11.2 L of hydrogen gas if calcium metal reacts with water at standard temperatur
12345 [234]

Answer:

The mass of water is 18 g

Explanation:

The reaction of calcium with water can be represented in the equation below:

Ca + 2H₂O --------->Ca(OH)₂ +H₂

1 Mole of gas at STP = 22.4L

From the displacement reaction above, calculate the mass of water that will produce 22.4L of hydrogen gas at STP.

Mass of 2H₂O = 2(2x1 + 16) = 2X18 = 36 g/mol

Using proportional analysis;

36 g of 2H₂O produced 22.4 L of H₂, then

what mass of 2H₂O will produce 11.2L of  H₂ ?

Mathematically,

22.4 L ----------------------------------> 36g

11.2 L -----------------------------------> ?

Cross and multiply, to obtain the expression below

= (11.2 X 36)/22.4

= 18 g

Therefore, the mass of water is 18 g

5 0
3 years ago
A. What does the identity of an element depend on the number of? B. electrons in the atom C. neutrons in the atom D. protons and
antiseptic1488 [7]

Answer:

B

Explanation:

i hope this help but if it didn't tell me.

6 0
3 years ago
Read 2 more answers
Please answer the question and explain
Sindrei [870]

Answer:

x=30

Explanation:

I will try to explain with a drawing.

This is a rule of three.

If you are wondering what the rule of three is. It's when u have 3 informations and you solve.

4 0
3 years ago
A particular atom has 58 protons and 82 neutrons. what are the atomic number, mass number, and periodic table symbol of this iso
nika2105 [10]
The answers are name: Cerium, symbol: Ce, atomic number: 58, and atomic mass: 140.110
7 0
3 years ago
Read 2 more answers
The reaction CH2CH2 + H2 → CH3CH3 is an example of
Viefleur [7K]
The choices can be found elsewhere and as follows:

<span>(1) substitution
(2) esterification
(3) addition
(4) fermentation 
</span>
I believe the correct answer is option 3. The reaction CH2CH2 + H2 → CH3CH3 is an example of an addition reaction. It is a<span> </span>reaction<span> where two or more molecules combine to form a larger one. Hope this answers the question.</span>
4 0
3 years ago
Read 2 more answers
Other questions:
  • There are ________ oxygen atoms in 30 molecules of c20h42s3o2.
    6·1 answer
  • How are continental drift and plate tectonics related
    9·1 answer
  • WWW<br> 7. What is the subscript for Hydrogen?
    9·1 answer
  • Why is the Meniscus important?
    10·1 answer
  • An unknown radioactive substance has a half-life of 3.20 hours . If 16.5 g of the substance is currently present, what mass A0 w
    12·1 answer
  • State a hypothesis based on the following:
    12·1 answer
  • Use the scenario below to answer the following
    7·1 answer
  • Calculate the molar mass of Al2O3.<br> A) 70 g/mol B) 43 g/mol C) 102 g/mol<br> D) 210 g/mol
    15·1 answer
  • How does one calculate the pH of a solution? O A. The pH is the product of [H+] and [OH-]. O B. The pH is the negative log of [O
    7·1 answer
  • WILL GIVE BRAINLIEST- What is the % of each element in Al2(CrO4)3
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!