We view two metals belowthat have the right to be exposed come water. The photo on the left is the sodium, which provides a violent reaction when it comes in call with water. The snapshot on the ideal is that silver, a steel so unreactive with water the it deserve to be made into drinking vessels.

You are watching: Based on the activity series which of the reactions will occur

Figure (PageIndex1): ~ above the left, sodium reacts through water. Top top the right, silver in the type of cups carry out not react v water.

The activity Series

Single-replacement reactions only take place when the facet that is act the replacing is much more reactive than the element that is gift replaced. Therefore, the is valuable to have actually a list of facets in bespeak of their relative reactivities. The activity series is a list of elements in decreasing stimulate of their reactivity. Due to the fact that metals replace other metals, while nonmetals replace various other nonmetals, lock each have actually a separate task series. The table below is one activity series of most common metals and also of the halogens.

Table (PageIndex1): Activity series of metals in Aqueous services Most energetic (Easily Oxidized—Readily lose Electrons)
lithium Li

These metals displace hydrogen from water Ca(s) + 2H2O(l)→ Ca(OH)2 + H2 (g). These facets are an extremely reactive and also react readily to type compounds.

potassium K
barium Ba
calcium Ca
sodium Na
These steels displace hydrogen from mountain Zn(s) + HCl(aq)→ ZnCl2 + H2(g)
magnesium Mg
aluminum Al
zinc Zn
chromium Cr
iron Fe
cadmium Cd
nickel Ni
tin Sn
lead Pb
hydrogen H
copper Cu These metals do no displace hydrogen from mountain or water. These facets are more stable, and kind compounds less readily than execute those greater in the table.
silver Ag
mercury Hg
platinum Pt
gold Au

Least Active

For a single-replacement reaction, a given facet is capable of replacing an element that is below it in the task series. This deserve to be supplied to predict if a reaction will certainly occur. Mean that small pieces of the metal nickel were placed into two separate aqueous solutions: one of iron (III) nitrate and also one of lead (II) nitrate. Looking at the activity series, we check out that nickel is below iron, but over lead. Therefore, the nickel steel will be capable of replacing the lead in a reaction, but will not be qualified of replacing iron.

See more: Answered: What Is The Oxidation Number Of Nitrogen In Aluminum Nitride, Aln?

In the descriptions that accompany the activity collection of metals, a offered metal is also capable of undergoing the reactions described below that section. Because that example, lithium will certainly react with cold water, replacing hydrogen. It will also react with vapor and v acids, since that calls for a lower degree of reactivity.

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