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 → CoCl2(aq)
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 ) → Ba2 + ( aq ) + 2e- |
Calcium | Ca( s ) → Ca2 + ( aq ) + 2e- |
Sodium | Na( s ) → Na + ( aq ) + e- |
Magnesium | Mg( s ) → Mg2 + ( aq ) + 2e- |
Aluminum | Al( s ) → Al3 + ( aq ) + 3e- |
Manganese | Mn( s ) → Mn2 + ( aq ) + 2e- |
Zinc | Zn( s ) → Zn2 + ( aq ) + 2e- |
Chromium | Cr( s ) → Cr3 + ( aq ) + 3e- |
Iron | Fe( s ) → Fe2 + ( aq ) + 2e- |
Cobalt | Co( s ) → Co2 + ( aq ) + 2e- |
Nickel | Ni( s ) → Ni2 + ( aq ) + 2e- |
Tin | Sn( s ) → Sn2 + ( aq ) + 2e- |
Lead | Pb( s ) → Pb2 + ( aq ) + 2e- |
Hydrogen | H2 ( g ) → 2H + ( aq ) + 2e- |
Copper | Cu( s ) → Cu2 + ( aq ) + 2e- |
Silver | Ag( s ) → Ag + ( aq ) + e- |
Mercury | Hg( l ) → Hg2 + ( aq ) + 2e- |
Platinum | Pt( s ) → Pt2 + ( aq ) + 2e- |
Gold | Au( s ) → Au3 + ( aq ) + 3e- |
Chromium metal is immersed in an aqueous solution of cobalt(II) chloride.
Frequently Asked Questions
What scientific concept do you need to know in order to solve this problem?
Our tutors have indicated that to solve this problem you will need to apply the Activity Series concept. You can view video lessons to learn Activity Series. Or if you need more Activity Series practice, you can also practice Activity Series practice problems.
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