Ionic structures and bonding
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Sorted FAQs on Ionic Structures and Bonding
This topic has attracted several questions to Re:act over the years. To help you find the ones of most interest to you more easily, whether they are about background theory or a particular experiment, we have sorted the FAQs under several headings below, with a direct link to each question and answer.
1. Type of bonding
•Why is NaH ionic and not covalent?
•Types of bonding in hydrated sodium carbonate?
•Types of compound: CuCO3 & CuO?
•Examples to illustrate trend from ionic to covalent bonding?
•Dot & cross structure for Mg(NO3)2
2. Lattice energies
•Effect of covalent character on lattice energy
•Why Born-Haber lattice energy for NaCl not more than theoretical value?
•Which has bigger lattice energy: NaCl or KCl?
•Link between lattice energy and hydration energy
•Why is lattice energy of MgO so much larger than NaCl?
•Lattice energy of Al2O3
•Lattice energy vs hydration energy for NH4Cl
•Born-Haber cycle for Al2O3?
3. Properties
•High M.Pt. of Al-oxide
•Why melting point of magnesium oxide, MgO higher than silicon dioxide,SiO2?
•Why is rock salt harder than sugar crystals?
•Does M.Pt. increase as lattice energy increases across a period?
•Why is the M.Pt. of MgO higher than MgCl2?
•Why is M.Pt. NaCl > M.Pt. MgCl2?
•Properties of Al-oxide, sugar, NaCl
4. Miscellaneous
•Why does temperature rise when NaOH dissolves inwater?
•Directional vs non-directional forces: ionic or covalent?
•Displayed formula for MgSO4?
•Which electrons do transition metals lose first?
•Key features of structure of NaCl
•Ionic crystals by evaporation - of what?
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updated: 13 August 2008
