[hxha5 (OP)]

Hello, I need the answers for the reactants of the following insoluble salts:

Calcium Sulphate

Magnesium Carbonate

[Kryptid]

The question isn't really clear. Are you asking what chemicals react together to product those two chemicals?

[hxha5 (OP)]

Yes

[evan_au]

Trying to remember my distant chemistry lessons...if you want to know which compounds are soluble in water, producing an insoluble residue, read the solubility rules...

#2. All sodium, potassium, and ammonium salts are soluble in water
#3. The chlorides, bromides, and iodides of (most) metals ... are soluble in water.

Use Rule #2: Select a Sodium salt: Sodium Sulphate and Sodium Carbonate.
Use Rule #3: Select a Chloride salt: Magnesium Chloride and Calcium Chloride

Sodium Sulphate_(aq) + Calcium Chloride_(aq) = Calcium Sulphate_(s) + Sodium Chloride _(aq)

Sodium Carbonate_(aq) + Magnesium Chloride_(aq) = Magnesium Carbonate_(s) + Sodium Chloride_(aq)

https://www.chem.tamu.edu/rgroup/hughbanks/courses/462/handouts/The_Solubility_Rules.pdf

[Bored chemist]

Or copper sulphate and calcium acetate
or ammonium sulphate and calcium nitrate or
magnesium sulphate and calcium iodide
sulphuric acid and calcium chloride
or lots and lots of other possible combinations.
There's no single answer to the question.
Essentially, almost any soluble sulphate and any soluble calcium salt

[chiralSPO]

CaO + SO₃ → CaSO₄

2 Mg + 3 CO₂ → 2 MgCO₃ + C

[Bored chemist]

Mg (OH)₂ + Mg(HCO₃)₂  --> 2 MgCO₃  +H2O

MgC₂ +CO₂ + H₂O  --->  C₂H₂ +MgCO₃

There's a similar one for the other carbide.

[naresh1537]

Calcium sulfate is not produced, but can be occurred in Gypsum !