That is magnesium sulfate hydrate.
Neither H2O nor MgSO4 are elements. They are COMPOUNDS. In terms of volume occupied , MgSO4 is the larger.
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MgSO4∙7H2O(s) -heat→ MgSO4∙H2O(s) + 6H2O(g)
The chemical equation for the dehydration of magnesium sulfate (MgSO4) is as follows: MgSO4·7H2O + Heat => MgSO4 + 7H2O A link is provided below for more information.
The reaction is:MgO + H2SO4 = MgSO4 + H2O
MgSO4+ H2O + CO2
MgCO3 + H2SO4 --> MgSO4 + CO2 + H2O
The reaction is:MgO + H2SO4 = MgSO4 + H2O
The formula for Magnesium hydrogen sulfate is: Mg(HSO4)2
When sulfuric acid reacts with magnesium carbonate, it forms magnesium sulfate, carbon dioxide, and water. This is a double displacement reaction where the ions switch partners. The balanced chemical equation for this reaction is: H2SO4 + MgCO3 -> MgSO4 + CO2 + H2O.
The decomposition equation for Epsom salt (magnesium sulfate heptahydrate) is: MgSO4·7H2O -> MgSO4 + 7H2O. When heated, Epsom salt loses its water molecules, leaving behind anhydrous magnesium sulfate.
The reaction is:H2SO4 + MgCO3 = H2O + CO2 + MgSO4