Question

4. Arrange these different types of bonding and attraction in order of increasing bond strength from the lowest to the highest, carefully explaining your reasoning.

H2S –Hydrogen Sulphide.

Fe2O3 – Iron Oxide, or rust as we know it.

H30+ - Hydronium ion.

CO2 – Carbon Dioxide.

CH2O – Formaldehyde.

Mg3N3 – Magnesium Nitrate.

NaCl - Table salt.

AlO – Aluminium Oxide.

Br2 – Bromine Gas.

Answer 1

IOnic bonding are due to electrostatic attractions ,so they are the strongest.Higher the charge on the ions,stronger the electrostatic attraction.

Ionic bonding : NaCl,(charge +1,-1)

Mg3N3(charge -1 for N3- and +2 for Mg),Fe2O3(Fe3+,O2-)

order

Fe2O3>Mg3N3>NaCl

Covalent bonding is due to sharing of electrons ,higher pairs of electrons shared ,high is the bond order(double bonded sharing two electon pairs,triply bonded sharing three electron pairs etc) so stronger is the bond

covalent compounds: H2S(single bond)

CO2(two double bonds)

CH2O(single bond between C-H and C=O}

partial bonding by electron donations:Coordinate bond,higher number of electron pair donation,stronger coordinate bond

Coordinate bond: Al2O3 (double bridge bond between two Al)

H3O+ (H2O woth O atom donation one electron pair to H+)

Fe2O3>Mg3N3>NaCl>CO2>CH2O>H3O+>Al2O3 >H3O+