[ziggy777]

when studying the compound magnesium sulfide i read that the compound decomposes in water. ! does decompose means dissociates? like Mg2+ and S2- ?? I'm very confused....does MgS dissolves or not? I read on one website that it does. But other website says that it decomposes when placed in water and I also read that metals decompose when exposed to heat ... what exactly happens when MgS is placed in water?? is it soluble or not? Many Thanks!

[Borek]

Soluble, decompose doesn't mean dissociate, no reasons for MgS to decompose in water, metals don't decompose when exposed to heat.

[kapital]

MgS is salt, the hydolses of salts: MgS(s) --> (Mg2+ + + OH- S2-)aq No H30+ because H2S is weeak acid.(maybe the are some of them, but when we do this at school we do it like this)

[Borek]

MgS is salt, the hydolses of salts: MgS(s) --> (Mg2+ + + OH- S2-)aq No H30+ because H2S is weeak acid.(maybe the are some of them, but when we do this at school we do it like this)

Gibberish. Could be you know what is going on, but you have not explained it even partially properly.