Why does MgO have a higher melting point than NaCl ?
Why does MgO have a higher melting point than NaCl ?
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1 Answer
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Higher melting point means more energy is required to break the ionic bond. Since the ionic bonds in MgO are stronger than in NaCl due to various reasons, It have higher melting and even boiling point. Reasons are listed below:
- In MgO, Magnesium and oxygen ions carry a +2 and -2 charge while sodium and in NaCl, chlorine ions carry a +1 and -1 charge. Due to higher charges more electrostatic attraction is involved.
- The smaller ionic radius of Mg2+ are smaller compared to Na+, makes the bond stronger in MgO.
- Due to larger elctrostatic force and smaller ionic radius, ionic bond in MgO are stronger, resulting in higher lattice energy.
- The stro
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