Edexcel Jun 2014 (IAL) Paper 2 Q18

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SECTION B Answer ALL the questions. Write your answers in the spaces provided. 18 When concentrated sulfuric acid is added to solid sodium chloride, the gas hydrogen chloride is produced. (a) Write an equation for this reaction. State symbols are not required. (b) Fumes of hydrogen chloride gas can be identified by bringing the fumes into contact with another gas, X. Identify gas X and state the observation you would make. (1) (2) Gas XObservation(c) Chloride ions in solution can be distinguished from other halide ions by the addition of silver nitrate solution followed by dilute, aqueous ammonia. State what you would see when silver nitrate solution is added to chloride ions, followed by dilute aqueous ammonia. Suggest why concentrated ammonia should not be used to confirm that silver chloride has been formed. (3) Observation on addition of AgNO3Observation on addition of dilute NH3Reason why concentrated NH3 should not be used(Total for Question 18 = 6 marks) *P42977A01124* 11 Turn over<br />

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