Changes

<math>NaCl(aq) + AgNO_3(aq) → NaNO_3(aq) + AgCl(s)</math>

: A white [[precipitate]] is formed.

<math>NaBr(aq) + AgNO_3(aq) → NaNO3(aq) + AgBr(s)</math>

: A cream coloured [[precipitate]] is formed.

<math>NaI(aq) + AgNO_3(aq) → NaNO3(aq) + AgI(s)</math>

: A yellow [[precipitate]] is formed.

====Carbonates====

The test for [[carbonate]] [[anion]]s begins by adding [[Hydrochloric Acid]] to the [[solution]]. This [[product|produces]] a [[gas]] which is collected and bubbled through [[Limewater]] to identify if [[Carbon Dioxide]] has been [[product|produced]]. If [[Carbon Dioxide]] has been [[product|produced]] then the [[Limewater]] will turn from [[transparent]] to cloudy.

<math>Na_2CO_3(aq) + 2HCl(aq) → 2NaCl(aq) + H_2O(l) + CO_2(g)</math>

: A [[gas]] is [[product|produced]] and bubbled through [[Limewater]].

<math>CO_2(g) + CaO(aq) → CaCO_3(s)</math>

: The [[Calcium Carbonate]] makes the [[Limewater]] appear cloudy.