Lec 10 chem 6c

Lec 10 chem 6c - & H 2 SO 4(aq SO 2(g H 2 O(l& H 2 SO...

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The Big Bang Baryon Numbers Review Periodic Trend Review
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Atomic Size Matters! (periodic trends) Preview
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Atomic Radii in the Main Groups
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Not a very good trend!!!! Electron Affinities
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Ionization Energy
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Paulings’ electronegativity is a measure of the dissociation energy
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Cations Ionic Radius Anions Ionic Radius
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Polarizability
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Varies with size
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Small metal ions like Be 2+ and Al 3+ have a lot of polarizing power which add to the covalent character of the bond. Be 2+ O 2- e -
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Be 2+ O 2- Small metal ions like Be 2+ and Al 3+ have a lot of polarizing power which add to the covalent character of the bond. The electron cloud is distorted so beryllium shares more of the electrons from the oxygen e -
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When a covalent oxide is dissolved in water an acidic solution is formed: SO 3 (g) + H 2 O(l)
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Unformatted text preview: & H 2 SO 4 (aq) SO 2 (g) + H 2 O(l) & H 2 SO 3 (aq) CO 2 (g) + H 2 O(l) & H 2 CO 3 (aq) 2NO 2 (g) + H 2 O(l) & HNO 3 (aq) + HNO 2 (aq) Why do covalent oxides tend to form acids when dissolved in water? The highly electronegative O atoms remove electrons from the central atom allowing it to accept an electron pair When an ionic oxide dissolves in water a basic solution is formed: CaO(s) + H 2 O(l) & Ca(OH) 2 (aq) K 2 O(s) + H 2 O(l) & 2KOH(aq) The oxide ion has a high affinity for protons (the oxide ion is a strong base) The shared electrons add to the covalent character of the oxide and cause BeO and Al 2 O 3 to both be amphoteric Be 2+ O 2-Amphoteric- capable of reacting as an acid or a base...
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Lec 10 chem 6c - & H 2 SO 4(aq SO 2(g H 2 O(l& H 2 SO...

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