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
Norma-Jean [14]
2 years ago
7

Which is least likely to be reduced? A. Zn^2+ B. Fe^3+ C. Cu^2+ D. Fe^2+

Chemistry
1 answer:
alekssr [168]2 years ago
6 0

A. Zn²⁺

<h3>Further explanation</h3>

Given

Cations of several elements

Required

The least to be reduced

Solution

If we look at the voltaic series:

<em>Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe²⁺-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Fe³⁺-Ag-Pt-Au </em>

The electrode which is easier to reduce than the hydrogen (H2) electrode has a positive sign (E red= +) and is located to the right of the voltaic series (right of H)

The electrode which is easier to oxidize than the hydrogen (H2) electrode and is difficult to experience reduction has a negative sign (E red= -) and is located to the left of the voltaic series (left of H)

Or you can look at the standard reduction potential value of the metals in the answer options, and the most negative reduction E° value which will be difficult to reduce.

The Zn metal is located far left of the other metals in the answer choices, so it is the most difficult to reduce

You might be interested in
Which force is most responsible for slowing a bicycle down when the brakes are applied
Leya [2.2K]
Friction <span>is most responsible for slowing a bicycle down when the brakes are applied</span>
7 0
2 years ago
Name the type of equation shown here: 2NaBr+Ca(OH)2 —&gt;CaBr2+2NaOH
sergeinik [125]
A) Double replacement
Because the reactants switch when they become products
6 0
2 years ago
Read 2 more answers
True or False. Solutions for which water is the solvent are called aqueous solutions.
Stolb23 [73]
This is true. Water is the solvent in aqueous solutions
5 0
3 years ago
Which type of wave cannot move without a medium in which to travel?
Zanzabum

sound wave cannot travel without a medium.

5 0
2 years ago
could you please explain operations with scientific notation using this example. 5 × 10³ + 4.3 × 10⁴ i dont understand how to so
TEA [102]

Explanation:

The scientific notation:

a\times10^k

where

1\leq a and k is integer.

We have the example:

(5\times10^3)+(4.3\times10^4)

You can write the numbers in a "normal" form:

5\times10^3=5\times1000=5000\\\\4.3\times10^4=4.3\times10000=43000

Make the sum:

5000+43000=48000

And next write it in the scientific notation:

48000=4\underbrace{8000}_{\leftarrow4}=4.8000\times10000=4.8\times10^4

<h3>Other method:</h3>

You can add numbers in scientific notation if the power of tens in both number is the same.

Therefore you must convert the first number:

5\times10^3=0.5\times10\times10^3=0.5\times10^4

Now, you can make the sum:

(5\times10^3)+(4.3\times10^4)=0.5\times10^4+4.3\times10^4=(0.5+4.3)\times10^4=4.8\times10^4

4 0
2 years ago
Other questions:
  • How many grams are in 88.1 moles of magnesium?
    11·1 answer
  • What are other signs of chemical change
    6·1 answer
  • Which of the following mountain ranges is the result of a continent-continent orogeny?
    9·1 answer
  • What is the primary type of energy conversion that takes place inside a
    13·1 answer
  • High concentrations of ammonia (NH3), nitrite ion, and nitrate ion in water can kill fish. Lethal concentrations of these specie
    7·1 answer
  • Joel has noticed that his engine is not compressing properly during the compression and ignition step. What problem will this po
    7·1 answer
  • A cylinder is filled with 10.0L of gas and a piston is put into it. The initial pressure of the gas is measured to be 96.0kPa. T
    7·1 answer
  • How many molecules of glucose are in 1,456 grams of glucose?
    11·1 answer
  • Identifying organic compounds
    9·1 answer
  • Decide which element probably forms a compound with chlorine that has a chemical formula most and least similar to the chemical
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!