Homework Answers
| Ca2+ | Cu2+ | Fe3+ | Fe2+ | Mg2+ | Sn4+ | Zn2+ | Al3+ | |
| Ca | × |
Yes, calcium dissolves. |
Yes,calcium dissolves. |
Yes, calcium dissolves. |
Yes, calcium dissolves |
Yes, calcium dissolves | Yes, Calcium dissolves. | Yes, calcium dissolves. |
| Cu | N.R. | × | N.R. | N.R. | N.R. | N.R | N.R | N.R |
| Fe | N.R. | Yes, iron dissolves | × | × | N.R | Yes, iron dissolves. | N.R | N.R |
| Mg | N.R. |
Yes, Magnesiun dissolves. |
Yes, magnesium dissolves |
Yes, Magnesiun dissolves. |
× |
Yes, Magnesiun dissolves. |
Yes, magnesium dissolves. |
Yes, magnesium dissolves. |
| Sn | N.R | Yes, tin dissolves. | N.R | N.R. | N.R. | × | N.R. | N.R. |
| Zn | N.R. | Yes, zinc dissolves. | Yes,zinc dissolves | Yes, zinc dissolves. | N.R | Yes, zinc dissolves. | × | N.R. |
| Al | N.R. | Yes, Aluminium dissolves. | Yes, Aluminium dissolves. | Yes, Aluminum dissolves. | N.R | Yes, Aluminum dissolves. | Yes, Aluminum dissolves. | × |
--------------
All these reactions are examples of displacement reactions. In displacement reaction, more reactive metal displaces less reactive metal from its salt solutions.
The Reactivity series of metals (in order of decreasing reactivity down the group):-
Potassium K (Most Reactive Metal)
Sodium. Na
Calcium. Ca
Magnesium Mg
Aluminium Al
Zinc Zn
Iron. Fe
Tin Sn
Lead Pb
Hydrogen H
Copper. Cu
Mercury. Hg
Silver Ag
Gold. Au
Platinum Pt (Least reactive metal)
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