Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
When a strip of metal (M) is brought in contact with the solution containing its own ions (Mn+), then either of the following three possible processes can take place: The metal ion Mn+ may collide with the metallic strip and bounce back without any change. The metal ion Mn+ may collide with the strip, gain n electrons and get converted into metal atom, i.e. the ion is reduced. Mn+ + ne- M The metal atom on the strip may lose n electrons and enter the solution as Mn+ ion, i.e. metal is oxidized. M Mn+ + ne-Now, if the metal has a relatively high tendency to get oxidized, its atoms would start losing electrons change into positive ions and pass into the solution. The electrons lost, accumulate in the metal strip and cause it to develop negative charge. The negative charge developed on the strip does not allow metal atoms to continue losing electrons but it would reattract the metal ions from the solution in an attempt to neutralize its charge. Ultimately, a state of equilibrium will be established between the metal and its ions at the interface. Similarly, if the metal ions have relatively greater tendency to get reduced, they will accept electrons at the strip from the metal atoms and consequently, a net positive charge is developed on the metal strip. Ultimately, a similar equilibrium is established between the metal ions and the metal atoms at the interface. In either case, the separation of charges at the equilibrium state results in the electrical potential difference between the metal and the solution of its ions and is known as electrode potential.The exact potential difference at the equilibrium depends on the nature of the metal, its ions, the concentration of ions and the temperature.According to the present IUPAC conventions half reactions are always written as reduction half reactions and their potentials. It may be noted that: Reduction potential (tendency to gain electrons) and oxidization potential (tendency to lose electrons) of an electrode are numerically equal but have opposite signs. Reduction potential increases with the increase in the concentration of ions and decreases with the decrease in the concentration of the ions in solution. The reduction potential of electrode when the concentration of the ions in solution is 1 mol L-1 and temperature 298 K is called standard reduction potential ( ) or simply standard electrode potential ( ). The absolute value cannot be determined because once equilibrium is reached between the electrode and the solution in a half cell, no further displacement of charges can occur unless and until it is connected to another half cell with different electrode potential. This difficulty is overcome by finding the electrode potentials of various electrode relative to some reference electrode whose electrode potential is arbitrarily fixed. The common reference electrode used for this purpose is standard hydrogen electrode (SHE) whose electrode potential is arbitrarily taken to be zero.
Q. Illustrate Egg White Foams? Egg white foams when whipped or beaten, the air gets entrapped in the liquid present, and an interfacial tension is established between the ai
Containers in Illustrations C and D are identical Each container is 3.25'w x 3.25'w x 8.4'l Total capacity of each container 88.725 cubic feet Each container is filled wit
what is indicators?explain theories of indicators?
what are the diagonal relationship between berylium and aluminium
preparation and structure of xenon fluorides
How to determine the hybridization of a complex compound in a easy way? Generally d-block elements have tendency to form coordination compounds. from at. no. 21 .i.e scandi
what techniques can you use to separate solute from liquid
I NEED A DOCUMENT LOOKED AT FOR TOMORROW ITS CHROMATOGRA LAB AND ITS ASSESSED
Q. What is the basic structure of Alkynes? Ans. Alcohols have the general chemical formula of ROH. The R stands for the rest of the molecule and is usually an alkyl group
what is the pattern and mechanism of fatty acid distribution in trihydri alcohol for triacylglycerol formation.
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd