Question

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Anhydrous compound is CaSO4x2H2O

Moles of anyhydrous compound? Moles of water? formula of hydrated compound?

Anhydrous compound MgSO4x7H2O

moles of anhydrous commpound? moles of water? formula of hydrated compound?

Anhydrous compound is ZnSO4x7H2O

moles of anhydrous compound? moles of water? formula opf hydrated compound?

Also does anyone know how to find the identity and formula of an unknown compound given the lab data? is there a specific way or formula to calculate that?

Answer 1

CuSO4x2H2O

Moles of anhydrous compound = 1mol

moles of water = 2mol

formula for hydrated compound = CuSO₄.2H₂O

Name = Calcium sulfate dihydrate

MgSO4x7H2O

Moles of anhydrous compound = 1mol

moles of water = 7mol

formula for hydrated compound = MgSO₄.7H₂O

Name : Magnesium sulfate heptahydrate

ZnSO4x7H2O

Moles of anhydrous compound = 1mol

moles of water = 7mol

formula for hydrated compound = ZnSO₄.7H₂O

Name: Zinc sulfate heptahydrate.

To identify the compound we have do the qualitative test for each ion (for cation and anion). To know the formula elemental analysis should done.