To watch the action of Zn, Fe, Cu and also Al steels on the complying with salt solutions:

ZnSO4 (aq)FeSO4 (aq)CuSO4 (aq)Al2(SO4)3 (aq)

Arrange Zn, Fe, Cu and also Al steels in the decreasing order of reactivity based on the above results.

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The Theory

Metals are elements and also are good conductors of heat and electricity. Most steels are electropositive in nature and the steel atoms shed electrons in chemistry reactions to kind cations. The much more reactive a metal, the greater tendency it has actually to type a positive ion in a chemical reaction.

For example:


How are steels arranged in a routine table?

Metals accounting the bulk of the periodic table. The alkali metals are a collection of chemical facets in the periodic table. Alkali metals consist of group 1 in the routine table together with hydrogen. Alkali steels are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs) and francium (Fr). The group 2 aspects in the regular table are referred to as alkaline earth metals. Alkaline earth metals are beryllium (Be), magnesium (Mg) calcium (Ca), strontium (Sr), barium (Ba) and also radium (Ra). Group1 and group 2 elements are together called s-block elements. Elements of group 3 to 12 are change elements. this are also metallic in nature and also are dubbed transition metals. Lock are likewise called d-block elements. Non-metallic facets occupy the right side that the routine table. A diagonal line from boron come polonium separates metals from non-metals.


Now, let’s explore the nature of metals…

Physical properties of metals:

Good conductors the heat and electricity: In metals, the confident ions space surrounded by a sea of electrons and these space responsible for their conductivity.High melting suggest and cook point.They space malleable and ductile, therefore they have the right to be bent and stretched there is no breaking.In many metals, the atoms are extremely close packed, for this reason they have high density.They have a glowing appearance.Metals exist in solid state at room temperature other than for mercury, which is in a liquid state in ~ room temperature.

Chemical nature of metals:

A an ext reactive steel readily reaction with other elements. The many reactive metals will react even water, while the the very least reactive steels will no react also with acid.

Example: If we put a little piece of sodium metal in water, sodium reacts exothermically through water developing hydrogen and also metal hydroxide.


Metals react v oxygen in the waiting to form oxides.



Some metals react through acid and also replace hydrogen from the acid.


Single displacement reactions:

A solitary displacement reaction is crucial type of chemical reaction. It is likewise called substitution reaction. In this reactions, a cost-free element displaces an additional element native its compound, producing a brand-new compound. The reaction is commonly written as:


Single displacement reactions room all oxidation-reduction reactions. Because that example,


Definition that Displacement reaction: The chemistry reaction whereby one element takes the position or place of an additional element in a compound.

Displacement reactions are really common in metals. They have the right to be used to discover out the family member reactivities the metals. In a displacement reaction, a an ext reactive metal deserve to displace a much less reactive metal from that salt solution. The reaction is frequently known as steel displacement reaction.

Some of the generally used metals have actually been arranged in the decreasing order of reactivity. This is well-known as the reactivity series or activity series. The activity series of steels is an important concept in chemistry. The activity collection of metals is critical tool because that predicting the products of displacement reactions and also the reactivity of steels in various other reactions. Potassium is the most reactive metal, while platinum is the least reactive.


The higher the steel in the series, the more reactive the is and the much more vigorously that reacts through water, oxygen and also acid. A steel in the activity series can displace any kind of metal below it in the collection from its compound. The aspects potassium, sodium, lithium and calcium are very reactive and also they react through cold water to create hydroxides and also hydrogen gas. The aspects magnesium, aluminium and iron are likewise considered as active metals and they react with vapor to produce oxides and hydrogen gas. The metals over hydrogen are an ext reactive than hydrogen. This metals deserve to displace hydrogen from mountain or water and also liberate hydrogen gas. The metals copper, silver- gold and also platinum are less reactive 보다 hydrogen and they carry out not replace hydrogen indigenous water or acid.

Examples for metal-displacement reactions:

Zinc can displace copper indigenous copper sulphate solution and also iron from ferrous sulphate solution. Therefore zinc is more reactive 보다 iron and also copper.


If a piece of zinc steel is added to aluminium sulphate solution, no reaction take away place. Therefore aluminium is more reactive than zinc.

If small pieces of copper are added into remedies of zinc sulphate, aluminium sulphate and also ferrous sulphate, no reactions take it place. So, copper is less reactive 보다 zinc, aluminium and also iron.Aluminium have the right to displace Zn indigenous zinc sulphate solution, Cu indigenous copper sulphate solution and Fe indigenous ferroussulphate solution.



Iron displaces Cu indigenous copper sulphate solution, but it does no displace Al and also Zn from their salt solutions.


Not only steels but likewise non-metals deserve to take part in displacement reactions.

For example, chlorine gas displaces bromine indigenous potassium bromide solution. The solution of potassium bromide repurchase a yellowish and orange shade of the liberated bromine gas.

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Learning OutcomesStudents recognize the terms prefer metals, steel displacement reaction, reactivity series, etc.Students acquire skills to do & visualize the reactions of Al, Zn, Fe and also Cu v the following salt solutionsAluminium sulphateZinc sulphateFerrous sulphateCopper sulphateStudents have the right to analyze the an interpretation of reactivity collection of metals based upon the inferences indigenous the experiment.Students acquire skills to carry out an experiment to recognize the reactivity of metals in salt solutions.