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CAIE A-Level Chemistry AS 11.3.2 Reactions of Halide Ions Questions

Practise silver-nitrate tests followed by ammonia and the acid–base and redox reactions of halides with concentrated H2SO4.

Syllabus
2028–2030
Course
Chemistry 9701
Level
AS

Exam points

  • state AgCl white, AgBr cream and AgI yellow, then use ammonia solubility to distinguish them
  • write the initial proton-transfer equation producing HX when a solid halide meets concentrated H2SO4
  • for Br− or I−, balance the subsequent redox equations and identify SO2, sulfur or H2S products

CAIE A-Level Chemistry AS 11.3.2 Reactions of Halide Ions Questions question 1

[Maximum number: 2]

The Group 17 elements are oxidising agents.

Table 1.2 shows some information about reactions of NaCl\ce{NaCl}, NaBr\ce{NaBr} and NaI\ce{NaI}.

Table 1.2

Table 1.2

Suggest an identity for the species that produces each observation in the reaction of NaI with concentrated H2SO4\mathrm{H}_{2} \mathrm{SO}_{4}.
black solid
yellow solid
effervescence

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