ANCHQQ1 (G) QUIZ

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Created by
Mika Mamaril

Cards (15)

  • Anion analysis is the determination of the anions present in a given material or sample
  • Anions are the negatively charged particles of an atom
  • Examples of anions include halogens (F, Cl, Br, I) and monatomic anions like carbides (C), cyanide (CN), sulfides (S), and phosphides (P)
  • General scheme for anion analysis involves dividing anions into groups based on their reaction with HCl, solubility of their silver, barium, and calcium salts, and whether they are reducing or oxidizing agents
  • Preliminary tests for anion analysis include physical examination for color and smell, dry heating test, and identification of anions based on acid radicals
  • Confirmatory tests for anions include elimination tests and spot testing to prove the presence of ions not eliminated
  • Reasons for the procedures in anion analysis include the differences between anions, the focus on establishing groups rather than elements, and the stability of anions under specific conditions
  • Preparation of anion solutions involves removing metallic ions except Na, K, and NH4, testing for hydroxides and carbonate ions, and treating the mixture with concentrated sodium carbonate to precipitate cations
  • Products obtained from the preparation of anion solutions include oxides (Ag2O, HgO, CuO, MnO2), hydroxides, and carbonates
  • Group A anions give volatile products or precipitate with HCl, including CO3, S, SO3, NO2, CN, ClO, and S2O3
  • Group B anions form insoluble products with CaCl2 or BaCl2, such as C2O4, F, SiO3, CrO4, SO4, PO4, ASO4, ASO3, BO2, and BO3
  • Group C anions form insoluble products with AgNO3 in HNO3, with examples like Cl, Fe(CN)6-³, Br, I, SCN, CN, and [Fe(CN)6]-4
  • Group D anions reduce Fe+3 to Fe+2 in acidic solution and form a dark-blue precipitate of Fe3[Fe(CN)6]2, including SO3, I, S, S2O3, and NO2
  • Group E anions oxidize the pink solution of MnCl2 to a brown solution of MnCl3, such as CrO4, NO3-, NO2-, ClO-, ClO3, and Fe(CN)6-³
  • Group F anions are the "soluble" group, including ClO3, NO3, NO2, Ac-, and MnO4