![]() ![]() Whereas, noble metals like silver, gold and platinum are nearly non-reactive. Generally, the alkali metals are the most reactive metals followed by the alkaline earth metals which are followed by transition metals. The reactivity series starts with the cesium metal which means cesium is at the top of the reactivity series or is the most reactive metal of this series. So, the reactivity series also tells the outcome of single displacement reactions, which are used to extract metals from their ores. Zn (s) + CuSO 4 (aq) → ZnSO 4 (aq) + Cu (s) For example, zinc being more reactive than copper displaces copper from copper sulphate as shown in the below reaction This is the reason for the displacement of less reactive metals by more reactive metals in the single displacement reactions. The more reactive metals or high ranking metals reduces (donate electrons) the ions of less reactive metals or low ranking metals in the series. iii) Displacement reaction between metals Similarly, we can predict the reaction of other metals located above lead with acids with the help of reactivity series. For example, when Zn is located above lead in the series when reacts with sulphuric acid leads to the formation of zinc sulfate and H 2 gas. Lead including the metals located above it, form salts when react with hydrochloric acid or sulphuric acid hydrogen gas is also produced. Similarly, we can predict the reaction of other metals with water with the help of reactivity series. For example, when potassium reacts with water potassium hydroxide and H 2 are produced as shown in the below chemical reaction For example, it can help you predict the outcome of reactions of metals with water, acids and with other metals as described below i) Reaction between metals and waterĬalcium including the metals that are situated above it in the series react with cold water to form the corresponding metal hydroxide and hydrogen gas. The reactivity series not only provides information about the properties and reactivity of metals but also offers various other applications. The metals that are located above the hydrogen can displace it from acids such as HCl and H 2SO 4. This is because hydrogen helps compare the reactivity of metals. Metals placed high in the series need more energy for their separation from ores and other compounds.Īlthough hydrogen is a non-metal, it is placed in the reactivity series of metals.The metals that are placed above displaces the metals placed below from their salt solutions.The metals placed above the hydrogen produce Hydrogen gas (H 2) when react with dilute HCl or dilute H 2SO 4.The electro positivity (tendency to lose electrons) of metals also reduces while moving down the activity series of metals.As the reactivity decreases the reducing ability of metals also decreases down the series.The metals at the top of this series are powerful reducing agents as they tend to lose electrons (oxidised) easily.So, it also tells about the reactivity of metals towards water and acids. The reactivity of metals is generally determined by their ability to displace hydrogen gas from water and acids. The more reactive metal tends to displace less reactive metal in displacement reactions. The reactivity series tells whether a metal can displace another metal in a displacement reaction or not. It is generally a vertically presented series that contains the most-reactive elements at the top of the series and the least-reactive elements at the bottom. So, it is a list of metals arranged in order of decreasing reactivity. It means the more reactive metals come first in this series followed by less reactive metals. In this series, the metals are arranged in descending order of their reactivity. The electron donating tendency of metals reduces as we go down in the series.It refers to the reactivity series of metals or elements which are metals. > Metals which are placed at the higher position can displace metals from their salt that are placed below to it. > The elements liberate hydrogen gas on reacting with dilute $HCl$ or dilute $$which are found above the hydrogen element in the reactivity series. > When we go down in the reactivity series the reducing ability and electro-positivity of elements decreases. > The metals which are placed at the top of the reactivity series are very good reducing agents as they are easily oxidized. For example-$Mg$ metal can displace hydrogen ions from its solution hence it is more reactive than element hydrogen.įeatures of the activity series of metals – It also provides data on the reactivity of metals towards water and acids. The reactivity series provides information whether a metal can displace another in a single displacement reaction. Hint : We know that the activity series of metals is a list of metals where the arrangement of metals in the descending order of their reactivities. ![]()
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