1. Write the correet names for the following hydrates. Hint Look up Greek prefix
ID: 577589 • Letter: 1
Question
1. Write the correet names for the following hydrates. Hint Look up Greek prefixes for the numbers prcceding the water molocule Hydrate Name NajPOs.12H 2 Write the products that result when cach of the hydrates below are heated above the point of water. Hint: See above for an example. CuS04.5H20 NaPO412120 3. Which of the above hydrated salts will do you think would require the most time to remove all of its water molecules? Explain? A 3.914-g sample of gypsum, a hydrated salt of calcium sulfate (CaSO), was heated bya geologist in a crucible until a constant mass was obtained. If the mass of the anhydrous CaSOs salt was 2.914g 4. (a) Calculate the percent by mass of water in the hydrated calcium sulfate salt (b) Caleulate how many grams of water were removed from the hydrated salt (e) Calculate how many moles of water were removed from the hydrated salt drous salt (Casa) obtained (d) Calculate the number oftnoles ofthe (e) Calculate the mole ratio of H 0 to CaSOu and round your answer to the nearest whole number? (0 What is the formula of the hydrated salt hased on your calculation in (e) aboveExplanation / Answer
Ans 1 :
The name of the chemical compounds can be determined by their chemical constitution , the number of atoms and their oxidation state in the compound.
So the names of the compounds here are :
MgSO4.7H2O = Magnesium sulfate heptahydrate
CuSO4.5H2O = Copper (II) sulfate pentahydrate
FeSO4.8H2O = Ferrous (II) sulfate octahydrate
Na3PO4.12H2O = Sodium Phosphate Dodecahydrate
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