Problem: Using the activity series (refer to the following table), write balanced chemical equations for the following reactions. If no reaction occurs, simply write no reaction.Activity Series of Metals in Aqueous SolutionMetalOxidation ReactionLithiumLi( s ) → Li+ ( aq ) + e-PotassiumK( s ) → K + ( aq ) + e-BariumBa( s ) → Ba2 + ( aq ) + 2e-CalciumCa( s ) → Ca2 + ( aq ) + 2e-SodiumNa( s ) → Na + ( aq ) + e-MagnesiumMg( s ) → Mg2 + ( aq ) + 2e-AluminumAl( s ) → Al3 + ( aq ) + 3e-ManganeseMn( s ) → Mn2 + ( aq ) + 2e-ZincZn( s ) → Zn2 + ( aq ) + 2e-ChromiumCr( s ) → Cr3 + ( aq ) + 3e-IronFe( s ) → Fe2 + ( aq ) + 2e-CobaltCo( s ) → Co2 + ( aq ) + 2e-NickelNi( s ) → Ni2 + ( aq ) + 2e-TinSn( s ) → Sn2 + ( aq ) + 2e-LeadPb( s ) → Pb2 + ( aq ) + 2e-HydrogenH2 ( g ) → 2H + ( aq ) + 2e-CopperCu( s ) → Cu2 + ( aq ) + 2e-SilverAg( s ) → Ag + ( aq ) + e-MercuryHg( l ) → Hg2 + ( aq ) + 2e-PlatinumPt( s ) → Pt2 + ( aq ) + 2e-GoldAu( s ) → Au3 + ( aq ) + 3e-Chromium metal is immersed in an aqueous solution of cobalt(II) chloride.

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We are asked to write a balanced chemical equation for the following reactions.

Chromium metal is immersed in an aqueous solution of cobalt(II) chloride.

Chromium metal → Cr_(s)

cobalt(II) chloride → CoCl_2(aq)

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Using the activity series (refer to the following table), write balanced chemical equations for the following reactions. If no reaction occurs, simply write no reaction.

Activity Series of Metals in Aqueous Solution

Metal	Oxidation Reaction
Lithium	Li( s ) → Li⁺ ( aq ) + e^-
Potassium	K( s ) → K⁺ ( aq ) + e^-
Barium	Ba( s ) → Ba^{2 +} ( aq ) + 2e^-
Calcium	Ca( s ) → Ca^{2 +} ( aq ) + 2e^-
Sodium	Na( s ) → Na⁺ ( aq ) + e^-
Magnesium	Mg( s ) → Mg^{2 +} ( aq ) + 2e^-
Aluminum	Al( s ) → Al^{3 +} ( aq ) + 3e^-
Manganese	Mn( s ) → Mn^{2 +} ( aq ) + 2e^-
Zinc	Zn( s ) → Zn^{2 +} ( aq ) + 2e^-
Chromium	Cr( s ) → Cr^{3 +} ( aq ) + 3e^-
Iron	Fe( s ) → Fe^{2 +} ( aq ) + 2e^-
Cobalt	Co( s ) → Co^{2 +} ( aq ) + 2e^-
Nickel	Ni( s ) → Ni^{2 +} ( aq ) + 2e^-
Tin	Sn( s ) → Sn^{2 +} ( aq ) + 2e^-
Lead	Pb( s ) → Pb^{2 +} ( aq ) + 2e^-
Hydrogen	H₂ ( g ) → 2H⁺ ( aq ) + 2e^-
Copper	Cu( s ) → Cu^{2 +} ( aq ) + 2e^-
Silver	Ag( s ) → Ag⁺ ( aq ) + e^-
Mercury	Hg( l ) → Hg^{2 +} ( aq ) + 2e^-
Platinum	Pt( s ) → Pt^{2 +} ( aq ) + 2e^-
Gold	Au( s ) → Au^{3 +} ( aq ) + 3e^-

Chromium metal is immersed in an aqueous solution of cobalt(II) chloride.

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