The hydrated salt, MY3·xH2O, was heated strongly in a crucible to remove all the water molecules of crystallization. The data are for this experiment are given in the table below. Mass of empty crucible and cover 29.73 g Mass of crucible, cover, and hydrated salt 32.72 g Mass of crucible, cover, and anhydrous salt 31.52 g Molar mass of anhydrous salt 241.88 g/mol (i) Calculate the % composition by mass of water in the hydrated salt. (ii) Determine the value of x. (iii) M is in Period 4 of the Periodic Table of the Elements. If Y = NO3 – , identify the element M. (iv) What is the name of this hydrated salt? ___

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Q: X

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".