Question
A 15.67gsample of hydrate of magnesium carbonate was carefully heated, without decomposing the carbonate to drive off water. The mass was reduce to 7.58g. What is the formula of the hydrated?
Answers
DrBob222
15.67g = mass MgCO3.xH2O
-7.68 g = mass MgCO3
--------
xxxxx = mass H2O
mols H2O = grams/molar mass
mols MgCO3 = grams/molar mass
Find ratio of 1 mol MgCO3 to x mols H2O. That will be the empirical formula of the hydrate.
-7.68 g = mass MgCO3
--------
xxxxx = mass H2O
mols H2O = grams/molar mass
mols MgCO3 = grams/molar mass
Find ratio of 1 mol MgCO3 to x mols H2O. That will be the empirical formula of the hydrate.