Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: R

There are no items in this cart.
Continue Shopping
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

Get extra R 350 off


Is there any difference between reactivity series and electrochemical series or they are same?

7 years ago


Answers : (1)



In introductory chemistry, the reactivity series or activity series is an empirical series of metals, in order of "reactivity" from highest to lowest . It is used to summarize information about the reactions of metals with acids and water, single displacement reactions and the extraction of metals from their ores.

Going from bottom to top, the metals:

  • increase in reactivity;

  • lose electrons more readily to form positive ions;

  • corrode or tarnish more readily;

  • require more energy (and different methods) to be separated from their ores;

  • become stronger reducing agents.

The reactivity series is sometimes quoted in the strict reverse order of standard electrode potentials, when it is also known as the "electrochemical series":

Li > K > Sr > Ca > Na > Mg > Al > Zn > Cr > Fe > Cd > Co > Ni > Sn > Pb > H > Cu > Ag > Hg > Pt > Au

The positions of lithium and sodium are changed on such a series: gold and platinum are also inverted, although this has little practical significance as both metals are highly unreactive.

Standard electrode potentials offer a quantitative measure of the power of a reducing agent, rather than the qualitative considerations of other reactivity series. However, they are only valid for standard conditions: in particular, they only apply to reactions in aqueous solution. Even with this proviso, the electrode potentials of lithium and sodium – and hence their positions in the electrochemical series – appear anomalous. The order of reactivity, as shown by the vigour of the reaction with water or the speed at which the metal surface tarnishes in air, appears to be

potassium > sodium > lithium > alkaline earth metals,

the same as the reverse order of the (gas-phase) ionisation energies. This is borne out by the extraction of metallic lithium by the electrolysis of a eutectic mixture of lithium chloride and potassium chloride: lithium metal is formed at the cathode, not potassium.

7 years ago

Post Your Answer

Other Related Questions on Inorganic Chemistry

When the speed of an electron increases, its specific charge
As per the theory of relativity, as the velocity of electron increases its mass also increases. As specific charge is inversely proportional to mass, as mass increases specific charge...
Amogh Dasture 2 months ago
@ mandeep we know that specific charges are e/m e/m is inversely proportional to the velocity of the electron ,, therefore as speed of the electron increases , the specific charges...
Umakant biswal 2 months ago
When the spped of an electron increases, its charge /mass ratio or specific charge decreases.................................................
Mudit 2 months ago
Sir please tell me that what is henry`s rule nd how can I use it numerical question ?????????That`s I can get a secure answer???????And what is the value of Henry`s constant????
."water takes up, of gas condensed by one, two, or more additional atmospheres, a quantity which, ordinarily compressed, would be equal to twice, thrice, &c. the volume absorbed under the...
rahul kushwaha 26 days ago
@ rahul At a constant temperature, the amount of a given gas that dissolves in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium...
Umakant biswal 26 days ago
For the reaction SnO2(s) + 2H2(g) = 2H2O(g) + Sn(l) at 900 K the equillibrium steam hydrogen mixture was found to be 40% H2 by volume. The Kp is(a) 1.15 (b) 2.25 (c) 7.75 (d) 10
In the reacn. SnO2(s) + 2H2(g) = 2H2O(g) + Sn(l) Since solid and liquid states compounds would not take part in Kc or Kp. Hence, from chemical eqn., SnO2(s) + 2H2(g) = 2H2O(g) + Sn(l) t=0 V ...
Vikas TU 12 days ago
What are analgesics and food preservatives.........?
Analgesics are drugs that reduce or totally abolish pain without causing disturbances of nervous system. There are two types of analgesics i. Narcotic analgesics E.g.: Morphine ii....
SAI SARDAR 3 months ago
Analgesis is defined as the drugs that reduce or abolish pain without causing impairment of conciousness,mental confusion,incoordinationor paralysis or some other disturbances of nervous...
somprasad 3 months ago
An analgesic or painkiller is any member of the group of drugs used to achieve analgesia , relief from pain. Analgesic drugs act in various ways on the peripheral and central nervous...
Umakant biswal 3 months ago
@ DEEPAK THERE ARE many methods which are used in organic chemistry for the purification of the compound , kindly let me know which one u want to know in detail . there are methods like...
Umakant biswal one month ago
The density of He is 0.1784kg/m^3 at STP . If a given mass of He at STP is allowed to expand to 1.5 times its initial volume by changing the temperature and pressure, compute its resultant...
From charles law moles are to be constant. P1V1/T1 = P2V2/T2 1*V/273 = P2*1.5V/T2 P2/T2 = 1/(273 x 1.5)..............(1) New density = P2M/RT2 = > (P2/T2)*(M/R) = > 1/(273 x 1.5) *...
2017 years ago
How the the No of moles are constant plz explain?????????????????????????????????????????????????????????????
View all Questions »

  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details
Get extra R 3,750 off

Get extra R 350 off

More Questions On Inorganic Chemistry

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details