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Calculate mass percent of water in alum, KAI(SO4)2*12H2O?
What are the steps involved with this calculation? What's the actual mass percent of water?
Note: The * in the formula is the center dot that represents the separation of the salt formula and the entrapped water molecules.
2 Answers
- 1 decade agoFavorite Answer
first of all this compound is not an alum. general formula of alumis M2SO4.M2(SO4)3.24H2O.anyway % of water in this is 12(mass of water)/mass of compound=45.57%
- ?Lv 44 years ago
First, you may comprehend the formulation of Plaster of Paris = CaSO4 · 2H2O subsequently, it includes 4 H atoms, 6 O atoms, a million Ca atom, and a million S atom. total 12 atoms. 2d, mole ratio Water : Salt = 2 : a million ultimately, your question could be changed as "mass p.c." then, mass proportion of water = 2(18) / (2x18 + 40 + 32 + 4x16) which equivalent 26.40 seven% thank you!
