CHEMISTRY HIGH SCHOOL

Given the balanced ionic equation:Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)
Which equation represents the oxidation half reaction?
(1) Zn(s) + 2e– → Zn2+(aq)
(2) Zn(s) → Zn2+(aq) + 2e–
(3) Cu2+(aq) → Cu(s) + 2e–
(4) Cu2+(aq) + 2e– → Cu(s)

Answers

Answer 1

Answer:

Answer: Option (2) is the correct answer.

Explanation:

Oxidation is the process in which there is loss of electrons or increase in oxidation number of the element.

Whereas reduction is the process in which there is gain of electrons or decrease in oxidation number of the element.

For example, $Zn(s) + Cu^(2+) \rightarrow Zn^(2+) + Cu(s)$

Oxidation-half reaction: $Zn(s) \rightarrow Zn^(2+) + 2e^(-)$

Reduction-half reaction: $Cu^(2+) + 2e^(-) \rightarrow Cu(s)$

Thus, we can conclude that the given equation Zn(s) → Zn2+(aq) + 2e– represents the oxidation half reaction.

Answer 2

Answer:

The equation that represents the oxidation half reaction is Zn(s) → Zn2+(aq) + 2e–

What is oxidation reaction?

Oxidation reaction is the process in which there is loss of electrons or increase in oxidation number of the element.

From all the given half reaction, there is only one reaction with increase in oxidation number;

Zn(s) → Zn2+(aq) + 2e–

Zn(s) - oxidation = 0
Zn2+ - oxidation number = +2

Thus, there is increase in oxidation number of 0 to + 2.

Learn more about oxidation number here: brainly.com/question/27239694

#SPJ5

Related Questions

Lenses can be found in a variety of objects. Which example does not contain a lens?A. a magnifying glass B. a telescope C. chemical safety goggles D. a microscope
The rate law for a reaction is rate = k[A]2. What is the overall order of this reaction, and which two varaibles, when graphed, will give a straight line for this reaction? A. first order, In[A]t versus t B. first order, 1/[A]t versus t C. second order, In[A]t versus t D. second order, 1/[A]t versus t
For an ideal gas, classify the following pairs of properties as directly or inversely proportional.P and T V and n T and V P and V P and n
What's the purpose of the battery in a circuit
Which term defines the amount that a solute can dissolve into a solution? A. solute level B. solution level C. solubility level D. saturation level

Which of the following changes should improve water solubility? A. adding a methyl group B. adding a hydroxyl group C. adding a carboxyl group D. increasing the size of the drug E. adding a benzene ring

Answers

Answer:

B. adding a hydroxyl group C. adding a carboxyl group

Explanation:

Solubility in water is due to the polar interactions or the hydrogen bonding.

Methyl group and benzene ring are both polar and hydrophobic in nature and thus will not improve water solubility.

Increasing size of drug will make more insoluble as more size of the solute is being added.

Adding hydroxyl or carboxyl group can improve water solubility as both the groups are highly hydrophilic and polar. These groups can form hydrogen bond with the water molecules and make drug more soluble in the water.

As ocean depth increases, _____. temperature increases density decreases salinity increases pressure decreases

Answers

Answer:

The correct option is: salinity increases

Explanation:

Ocean is a large water body that is a division of the World Ocean. An ocean is divided into various vertical zones based upon the physical and biological conditions.

The halocline zone is characterized by a rapid increase in the salinity with the increase in the depth. Thus resulting in decrease in the temperature of maximum density with the increase in salinity.

Answer:salinity increases

Explanation:

Degradates, unlike their parent compounds, are always completely harmless true or false

Answers

The correct answer fro above statement is:

False

Explanation:

Some elements in the atmosphere start the body and are consistent when they are dropped. Others are diminishing. Degradation stocks may be more lethal or less virulent than the first chemical. Other chemicals are deposited momentarily in the organs and are discharged shortly after. After a while, most chemicals and degradation stocks are ordered of as body waste, in the stool, urine, sweat and breathed air.

Answer:

false

Explanation:

In 1 kilogram of pure water, the mass of hydrogen atoms is approximately 112 grams, or 0.112 kilograms. What is the energy equivalent of this mass in joules?