Ionic bonding & structure questions

Assignment: Questions on Topic 4: Ionic bonding & structure

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1

State the formula of:

i. sodium carbonate

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ii. aluminium phosphate

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iii. calcium hydrogencarbonate

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iv. chromium(III) hydroxide

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v. copper(I) nitrate

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vi. ammonium sulfate

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vii. caesium iodide

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2

The formula of an oxide of iron is FeO. State the formula of (a) the nitrate and (b) the chloride of iron with the same oxidation state.

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3

Explain why sulfur forms ionic compounds containing the S2− ion.

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4

Use sodium chloride as an example to explain what is meant by ionic bonding.

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5

Explain why the oxide of sodium, Na2O, is ionic whereas the oxide of chlorine, Cl2O, is covalent.

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6

Explain why aluminium fluoride and aluminium oxide are ionic whereas aluminium chloride is covalent.

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7

Explain why the lattice enthalpy of calcium oxide, CaO is lower than the lattice enthalpy of magnesium oxide, MgO.

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