Chemistry 9701 · AS & A Level · Group 17

Group 17 — practice question

Sodium azide, $\text{NaN}_3$, is dissolved in water. Acidified silver nitrate is then added to the solution, producing a white precipitate. Aqueous ammonia is added next to the white precipitate. The azide ion, $\text{N}_3^-$, shows chemical properties similar to those of the $\text{Cl}^-$ ion. Which row in the table could be predicted from this information?

  • Awhite precipitate: $\text{AgN}_3$; colourless solution formed
  • Bwhite precipitate: $\text{AgN}_3$; precipitate remains
  • Cwhite precipitate: $\text{Ag}_3\text{N}$; colourless solution formed
  • Dwhite precipitate: $\text{Ag}_3\text{N}$; precipitate remains

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