How many grams of H2O will be lost as steam if you heat 12.21g of CuSO4 · 4H2O? What is the chemical name of CuSO4 · 4H2O?

3.798g of H₂O

Explanation:

In 1 mole of CuSO₄.4H₂O there are 4 molecules of water. The heat produce the releasing of 4 waters of hydration. To solve this question we need to convert the mass of CuSO₄.4H₂O to moles using its molecular mass (231.67g/mol). The moles of CuSO₄.4H₂O times 4 are the moles of water:

Moles CuSO₄.4H₂O:

12.21g CuSO₄ * (1mol / 231.67g) = 0.0527 moles

Moles H₂O:

0.0527 moles * 4 = 0.2108 moles of water

Mass (Molar mass H₂O = 18.015g/mol):

0.2108 mol * (18.015g / mol) =

in theory, limestone is composed principally of the compound calcium carbonate - caco3, but in reality this compound is deposited in conditions involving a number of other compounds as impurities so it ends up being a mixture of many compounds.

hope this : -)

tony (lordcaos066)