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1. (a) (i) Titanium(IV) oxide is an ionic solid - Edexcel - GCSE Chemistry - Question 1 - 2019 - Paper 1
Question 1
1. (a) (i) Titanium(IV) oxide is an ionic solid. Many ionic solids are soluble in water. Titanium(IV) oxide is not soluble in water. Its other physical properties ar... show full transcript
Worked Solution & Example Answer:1. (a) (i) Titanium(IV) oxide is an ionic solid - Edexcel - GCSE Chemistry - Question 1 - 2019 - Paper 1
Step 1
Predict one other physical property of titanium(IV) oxide that would be typical of ionic solids.
Answer
One typical physical property of titanium(IV) oxide is that it has a high melting point. Ionic solids generally have high melting and boiling points due to the strong electrostatic forces between the oppositely charged ions.
Step 2
Deduce the charge of the titanium ion in titanium(IV) oxide.
Answer
The formula of titanium(IV) oxide is TiO₂. Since each oxide ion (O²⁻) has a charge of -2, and there are two oxide ions in the compound, the total negative charge contributed by the oxide ions is -4. To balance this charge, the titanium ion must have a charge of +4.
Step 3