Chemistry 5070 · O Level · Identification of ions and gases

Identification of ions and gases — practice question

At room temperature and pressure, compound X exists as a crystalline solid. An aqueous solution of X is examined as follows. Test results: • Acidify with dilute nitric acid, then add aqueous barium nitrate: no observable change. • Add aqueous ammonia: a white precipitate forms, which dissolves in excess. What is a possible identity of X?

  • Aammonium carbonate
  • Bsodium sulfate
  • Ccalcium nitrate
  • Dzinc chloride

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI