#Reactivity series practice free

Note: Potassium reacts extremely violently with water to form a colorless aqueous solution of KOH with a release of12 mole of H 2 gas. The reaction between metals and water - Metals from potassium to calcium will react with cold water to release hydrogen gas.Ĭhemical Equations for the reaction of K and Ca with cold water are:.So, by reactivity series, you can also tell that which metal will displace another metal.

In displacement reaction - Displacement reactions are that reactions in which more reactive metal displaces less reactive metal from its salt. Zn + H 2SO 4 → ZnSO 4 + H 2 Important Uses of Reactivity Series

Here, zinc sulfate and H2 gas are formed as products. The reaction between sulphuric acid and zinc is an example of such a reaction. These reactions also contain the liberation of hydrogen gas. Lead and the metals are on high lead on the activity series form salts when reacted with sulphuric acid or hydrochloric acid. For example, the reaction between potassium and water yields potassium hydroxide and hydrogen gas as described by the chemical equation below.ĢK + 2H 2O → 2KOH + H 2 Reaction Between Metals and Acids Higher category metals require more energy to isolate from ores and other compounds.Ĭalcium and metals that are more reactive than calcium in the reactivity series can react with cold water to form the corresponding hydroxide, releasing hydrogen gas. Metals placed high in the reactivity series can displace metals lower in their salt solutions. The reducing power of metals weakens as you go through the series.Įlectropositivity of elements also decreases as one moves down the metal reactivity series.Īll metals above hydrogen in the activity range release hydrogen gas when reacted with dilute HCl or dilute H2SO4. These metals tarnish/corrode very easily. Metals at the top of the series of reactivity are strong reducing agents because they oxidize quickly.

#Reactivity series practice free

Metals at the top of the series are very reactive and, therefore, they do not occur free in nature, while the metals at the bottom of the series are least reactive and, therefore, they normally occur free in nature. The metals which are placed below hydrogen are less reactive than hydrogen and cannot displace hydrogen from its compounds like water and acids.Ī more reactive metal (placed higher in the reactivity series) can displace the less reactive metal from the solution of its salt. The metals which have been placed above hydrogen are more reactive than hydrogen and can displace hydrogen from its compounds like water and acids to liberate hydrogen gas. Lithium is the most reactive and platinum is the least reactive metal. The metal which is higher in the activity series is more reactive than the other. The reactivity series is very useful as it gives the following information: Reactivity Series of Metal chart are given below: Metals with high atomic numbers are more reactive because their electrons are far from the positively charged nucleus thus, they can be easily removed. Metals form positively charged ions because they tend to lose electrons. The reactivity of metals is due to their incomplete outer orbitals or their electron configuration. It is also known as a series of activities. Thus, a metal reactivity series can be defined as a series of metals in order of reactivity from highest to lowest. A reactivity series is a series of metals based on their reactivity from highest to lowest.