Question

1 This question is about ions and ionic compounds. (a) Choose from the following list of ions to answer the questions. Br – Ca2+ Cl – Cr3+ Cu2+ K+ Li+ Na+ SO 2– SO 2– Each ion may be used once, more than once or not at all. State which ion: (i) gives a lilac colour in a flame test [1] (ii) forms a grey-green precipitate with aqueous ammonia [1] (iii) forms a white precipitate with aqueous sodium hydroxide [1] (iv) forms a cream precipitate with acidified aqueous silver nitrate [1] (v) forms a white precipitate with acidified aqueous barium nitrate

Answer 1

K+, Cr3+, Ca2+, Br-, SO4 2-