A clean iron nail was placed in a test tube containing copper sulphate solution. After some time, the colour of the solution changed from blue to green. a. Write the chemical equation involved in it.

b. Name the type of reaction that takes place.

c. Why does the colour of the solution change from blue to green?

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explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)