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Miracle Learning Centre Chemistry Tuition Question on Extraction and Properties of Metals . (O Level Chemistry Tuition/ IP Chemistry Tuition)

1. Titanium and nickel are transition metals. Some reactions of these two metals are given below. Titanium is extracted in a two-stage process from titanium (IV) chloride. Stage 1 – titanium(IV) oxide is heated with chlorine and carbon to form titanium (IV) chloride and carbon monoxide. Stage 2 - titanium (IV) chloride is heated with sodium in an atmosphere of argon to give pure titanium and sodium chloride. (a) (i) Construct the balance equation for stage 2. (ii) Calculate the mass of sodium required to react with 184 kg of titanium (IV) chloride. (b) Suggest why it is necessary to carry out the reaction of titanium (IV) chloride with sodium in an atmosphere of argon. (c) Titanium (IV) chloride is a liquid with a boiling point of 136.4°C. Suggest with a reason, the type of bonding in titanium (IV) chloride. (d) Titanium is expensive even though it is relatively abundant in the earth’s crust. Suggest a reason for this.

In an experiment, small amounts of three metals were added to three aqueous metal nitrate solutions. The results are shown in the table.

Predict the observations in (i) and (ii) when nickel is added to separate solutions of zinc nitrate and copper (II) nitrate. Write a chemical equation for one of the reactions that takes place. Miracle Learning Centre Answer to Chemistry Tuition Question on Extraction and Properties of Metals. (O Level Chemistry Tuition/ IP Chemistry Tuition) 1a.i.TiCl4 + 4Na Ti + 4NaCl a.ii.Mass of sodium = 1b. If air was present, sodium would oxidise./ To prevent sodium from reacting with oxygen in the air. 1c.Titanium (IV) chloride has covalent bonding as simple molecular compounds have low boiling points due to weak intermolecular bonds. 1d. Titanium chloride is extracted using sodium which is extracted using electrolysis which is a costly method. e.i.No reaction. e.ii.Blue solution went colourless and nickel coated with a silver solid. Ni (s) + Cu2+(aq)  Ni2+ (aq) + Cu (s) Learn from our Chemistry Tuition Questions and Answers. Miracle Learning Centre Call 6463 8756 or sms 8128 8342/9839 9908. (Specialist in Science and Maths) for Primary, Secondary and JC levels. Miracle Learning Centre specialises in Chemistry tuition, Physics tuition, Maths tuition and Science tuition Classes.