This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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here are the answers to the remaining questions: 5. a) (i) To test for hydrogen, bring a lighted splint to the mouth of a test tube containing the gas. If hydrogen is present, it will extinguish the flame with a characteristic 'pop' sound. (ii) Three uses of hydrogen gas are: • As a fuel in rocket propulsion. • In the Haber process for the industrial synthesis of ammonia. • For the hydrogenation of vegetable oils to produce margarine. (iii) Write the equation for the reaction of hydrogen with: (I) sodium metal: 2Na (s) + H_2 (g) → 2NaH (s) (II) copper (II) chloride solution: Hydrogen is less reactive than copper, so it cannot displace copper from its salt solution. No reaction (III) chlorine gas: H_2 (g) + Cl_2 (g) → 2HCl (g) b) (i) Give the reason why: (I) tin is used in the canning of food: Tin is used because it is unreactive with food and non-toxic, preventing corrosion of the can and contamination of the food. (II) copper is used in the manufacture of wires: Copper is used because it is an excellent electrical conductor and is ductile, meaning it can be easily drawn into thin wires. (ii) Name one ore of: (I) iron: Hematite (Fe_2O_3) (II) tin: Cassiterite (SnO_2) (iii) Name one alloy of: (I) iron: Steel (II) copper: Brass That's all for this set! What's next? 📸