Difference between sulphate and sulphide

hi
i am always confused about the difference between sulphate and sulphide? and how can i tell which now i will use ? thanks

if the anion is 1 element... the name ends in ide

HCl.. hydrogen chloride.. H+.. Cl-.. 1 element in the anion

MgCl2.. magnesium chloride.. H+.. 2 Cl-'s.. still 1 element in the anion.. ends in -ide

MgS.. magnesium sulfide
HgS2

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when the anion has more than 1 element.. and one of them is oxygen.. we go by the oxidation state of the central atom..
... ... ... ..acid... ... .. .salt...
lowest... hypo-ous.. .. .hypo-ite
higher... .... -ous.. ... .... -ite
higher.. .... .-ic... .. ... ....-ate
highest.. .per-ic... .... ..per-ate

for the sulfuric acid series...

oxidiation
state of S.. ... .. acid.. .. .. .. acid name.. ... .. Na salt.. ... .. .Na salt name
+2... ... ... ... .. H2SO2.. ... .hyposulfurous.. .. Na2SO2.. ... .sodium hyposulfite
+4.. ... ... ... .. .H2SO3.. ... ... .. sulfurous.. .. .Na2SO3.. ... .sodium sulfite
+6.. ... .. .. .. .. H2SO4.. ... .. .. .sulfuric.. ... .. Na2SO4.. ... .sodium sulfate
+8.. .. .. ... ... ..H2SO5. .. ... ..persulfuric.. ... ..Na2SO5.. .. ..sodium persulfate

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sodium hypochorite.. commercial bleach.. is NaClO

what do you suppose is the formula for perchloric acid?

sulphate - salt of sulphuric acid H2SO4
Example: BaSO4 - barium sulphate

sulphide - compound of an element with sulphur
Example: H2S, hydrogen sulphide, the "rotten egg smell"

Here's some examples of each...
Sodium sulphate is Na2SO4
Sodium sulphide is Na2S.

Ammonium sulphate is (NH4)2SO4
Ammonium sulphide is (NH4)2S

Hydrogen sulphate is H2SO4 Sulphuric acid.
Hydrogen Sulphide is H2S

Sulphate is an ionic molecule of sulphur and oxygen, sulphide is an ionic molecule of just sulphur.

Sulfate is the polyatomic ion - SO4^-2 where Sulfide is just a singular sulfur ion for example, S8. Sulfite is another polyatomic ion- SO2^-3.

Sulfate is a polyatomic ion with the chemical symbol SO4 and a valency of 2-.
Sulfide is a monatomic ion with the formula S2-

sulphate is a radical which has the sumbol SO4-2
while sulphide is the sulphur ion which is S-2

sulphate = SO4 2-
sulphide = the second element in a compound for example Magnesium Sulphide (MgS)