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
kaheart [24]
3 years ago
7

What evidence do you have that the slope of the natural logarithm plot will be the same for all ions of the same charge, and not

just for the ions you investigated?2If we start with 1 Msolutions of both Zn2+and Cu2+ions at 25 °C, the following oxidation-reduction reaction has a potential of 1.10 V.Zn(s) + Cu2+(aq) →Zn2+(aq) + Cu(s)Predict what would happen to the voltageof a batterybased on this reaction as the zinc metal is graduallyoxidized and the Cu2+ions are graduallyreduced. Use this prediction to explain whya battery-driven watch stops suddenly.
Chemistry
1 answer:
dimulka [17.4K]3 years ago
6 0

Answer:

See explaination

Explanation:

1) As Evidence we just need to observe the nernst equation,

E = E0 + 2.303 RT / nF log QR

E = cell potential

E0 = Standard cell potential

R = Universal gas constant 8.314 J/K Mol

n = Valency of ion

F = faradays constant 96485 C/ mol

T = temperature in Kelvin

QR = Reaction quocient

If we plot a graph between E and Concentration of ion , We get a straight line according to the equation y = mx + C. that is the nernst equation is in the form of equation of a straight line.

E = E0 + 2.303 RT / nF log QR

Here the slope will be 2.303 RT / nF.

That is if we are measuring the electrode potential at a constant temperature , the only factor which affects the slope will be the the charge of ions 'n'. If n is same for all the ions used the slope of natural logaritham plot wil be same.

if n = 1, at room temperature ( 273 + 25 = 298 K)

2.303 * 8.134 * 298 / 1 * 96486 = 0.0591

Thus it can be concluded that the slope of natural logarithm plot will be same for all ions of the same charge.

2) The Zn metal undergo Oxidation,

Zn(s) \rightarrow Zn2+ (Aq) + 2 e-

Copper undergo Reduction

Cu2+ (Aq)+ 2 e-\rightarrow Cu (s)

The standard electrode potential for the reaction is 1.10 V

Here what happens to Zinc is dissolution into the solution , that is oxidation and what happens at copper is deposition. As Zinc ions goes into the solution , accumulation of Zinc ions around the zinc electrode takes place. ant the electron realeased into the solution reaches to the copper solution through the wire connected between them. copper ions accepts the electron and turns into copper atom (Reduction) and gets deposited at the copper electrode. This electron flow is the current generated.

As copper ions gets reduced and deposits on the copper electrode the copper ions in the solution decreases. Ultimately a situation comes where the zn ions dissolution stops because the zn ions surrownding the anode repells the zn electrode and oxidation stops. At the cathode the absence of cu2+ at cathode electrode interface stops the deposition of at copper electrode also. In short the oxidation and reduction reactions stops . This means that the cell battery power is all used up. A battrery consist of galvanic cell. batteries stores energy in chemical form and deliver it as electrical energy through electrochemical reaction as explained above. when half reactions stops in the battery no current flow takes place and battery stops.

You might be interested in
How many molecules are in 50 grams of water?
blondinia [14]
The Molar mass of 50g of water is (18.015 g/mol). Hope this helps
3 0
3 years ago
Read 2 more answers
HELP!!!
WARRIOR [948]

Answer:

no

Explanation:

4 0
2 years ago
It is observed that the atoms of hydrogen in gas discharge tube emit radiations whose spectrum shows line characteristics (line
azamat

Answer: the line Spectra of hydrogen lies between the ultra-violet, visible light and infra-red of the electro magnetic spectrum

Explanation:

Electromagnetic radiation spans an wide range of wavelengths and frequencies. This range is called the electromagnetic spectrum. The electromagnetic spectrum is generally divided into seven regions, in order of decreasing wavelength and increasing energy and frequency. The 7 regions includes; radio waves, microwaves, infrared (IR), visible light, ultraviolet (UV), X-rays and gamma rays.

lower-energy radiation, such as radio waves, is expressed as frequency while microwaves, infrared, visible and UV light are usually expressed as wavelength and finally, higher-energy radiation such as X-rays and gamma rays, is expressed in terms of energy per photon.

Therefore, hydrogen lies between the ultra-violet, visible light and infra-red region of the electro magnetic spectrum.

5 0
3 years ago
Which of the following equations has correct formulas and also is a balanced equation?
aliya0001 [1]

Answer : The correct option is, (B)

Explanation :

Balance equation : Balanced equation are those equation in which the number of atoms of each element and the total charge must be same on products side and reactants side.

In the given options, only option (B) equation has correct formula and also a balanced equation.

2Be+O_2\rightarrow 2BeO

while the other options has incorrect formulas and also an unbalanced equations.

The correct equation for option A is, CaCO_3\rightarrow CaO+CO_2

The correct equation for option C is, 2Mg+O_2\rightarrow 2MgO

The correct equation for option D is, KCl+HNO_3\rightarrow HCl+KNO_3

Hence, the correct answer is, (B) 2Be+O_2\rightarrow 2BeO

5 0
3 years ago
How many molecules are there in 4.00 moles of sulfur dioxide?
FinnZ [79.3K]

Explanation:

4 x 6.02 x 10²³ = 2.41 x 10²⁴

5 0
3 years ago
Other questions:
  • Calculate the molality of a 27.0% (by mass) aqueous solution of nitric acid.
    6·1 answer
  • Can someone help me with this?
    10·1 answer
  • What mass of CCl4 is formed by the reaction of 5.14 g of methane with an excess of chlorine?
    14·2 answers
  • Mercury(II) oxide (HgO) decomposes to form mercury (Hg) and oxygen (O2). The balanced chemical equation is shown below.
    8·2 answers
  • What is different about beaker 4 compared to beaker 1
    11·1 answer
  • Water molecules are ____________ because the hydrogen atoms are positively charged on one end and the oxygen atoms are negativel
    11·1 answer
  • Describe how urine is removed from the blood and then eliminated from the body
    13·1 answer
  • A sample of gas contains 0.1300 mol of N2(g) and 0.2600 mol of O2(g) and occupies a volume of 23.9 L. The following reaction tak
    12·1 answer
  • LOOK AT THE IMAGE FOR THE QUESTION PLEASE
    9·1 answer
  • What happens if 2 hydrogen and 1 oxygen atoms are combined?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!