Question

write a net ionic equation for the reaction that occurs when chromium(ii) sulfide and excess hydrobromic acid (aq) are combined.

Answer 1

The net ionic equation for the reaction between chromium(II) sulfide and hydrobromic acid is CrS(s) + 2 H+(aq) → Cr2+(aq) + H2S(g), which represents the formation of chromium(II) ions and hydrogen sulfide gas.

Step-by-step explanation:

The net ionic equation for the reaction that occurs when chromium(II) sulfide and excess hydrobromic acid (aq) are combined is represented by the following steps:

1. The chromium(II) sulfide will first react with the hydrobromic acid to form chromium(II) ions and hydrogen sulfide gas.
2. Sulfide ions will react with hydrogen ions to form hydrogen sulfide gas.
3. The net ionic equation omits the spectator ions and only includes the ions and molecules directly involved in the reaction:

CrS(s) + 2 H+(aq) → Cr2+(aq) + H2S(g)