Use the calculated masses of the anhydrous compound and water (from #1) and the identity of the hydratedcompound (on the provided data slip) to determine the formula of the hydrated compound.5.Mass of anhydrous compound (from #1):Mass of water lost (from #1):A. Calculate moles of the anhydrous compound (MgSO.):B. Calculate moles of water:C. Determine the simplest mole ratio to find the empirical formula:(Note: unlike with determining formulas for compounds, you may round to the nearest whole number for the molesof water in the hydrate)Formula of the hydrate: M9SO4• _H2O6. Hydrate #2:Data for hydrate #2 (supplied on the data slip)Slip #Mass of hydrate before heatingMass of residue after heating(= anhydrous compound)Loss of mass upon heating(= water)A. Calculate moles of the anhydrous compound (M9SOA):B. Calculate moles of water:C. Determine the simplest mole ratio to find the empirical formula:Formula of the hydrate: MgSO4:-_H2O From the data above, calculate the mass of the anhydrous compound (= the residue) and the mass of water lost bysubtracting the appropriate masses. Copy the descriptions for the lines you are using from the table.1Mass of crucible + lid18.30 08 Y18.8979g18.6200918.6191Mass of crucible and hydrate + lid3Mass of crucible and residue + lid (1st heating)4Mass of crucible and residue + lid (2nd heating)"Mass of crucible and residue + lid (3rd heating)"Mass of lid (just in case!)8.47619*USE THE LAST HEATING PERFORMED FOR ALL CALCULATIONS.CALCULATIONS:SHOW YOUR WORK – WORK ALONE1.If we use good technique (avoid spills, etc.) then the following will be true:mass of hydrate = mass of the residue + mass of the water lostSmelMass of Ma ss f Crubile and hydicteMass of Mass of Cincible tlidtid18.8979%18.300880.5971Mass of hydrate (starting material)%3DMass of Cvalble and res,ide o6191Mass ofFlidMass of Mass of Crucible tilid18.30080.3183Mass of anhydrous compound (residue)%3DMass of Mass crucible a nidफनुननडोQ Crucib le and18.897918.61910.2788Mass of Ma SSresidueMass of water lost%3D2. Determine the percent salt (MgSO4, by mass) in the hydrate (starting compound):3.Use the data and calculations above to determine the percent water (by mass) in the hydrate (starting compound).4. If a different sample of your unknown contained 1.343 g of water, how many grams of M9SO4 would it contain? Usedimensional analysis and the mass percentage calculations from #2 and #3:

We are given experimental data for the heating of hydrated MgSO4 salt. All calculations for #1 are…

Mass of crucible + lid 18.30 08 Y 18.8979g 18.62009 |8.८1१। १ From the data above, calculate the mass of the anhydrous compound (= the residue) and the mass of water lost by Mass of crucible and hydrate + lid 3 Mass of crucible and residue + lid (1st heating) Mass of crucible and residue + lid (2nd heating)" Mass of crucible and residue + lid (3rd heating)" Mass of lid (just in case!) 8.47619 "USE THE LAST HEATING PERFORMED FOR ALL CALCULATIONS. CALCULATIONS: SHOW YOUR WORK – WORK ALONE 1. If we use good technique (avoid spills, etc.) then the following will be true. mass of hydrate = mass of the residue + mass of the water lost subtracting the appropriate masses. Copy the descriptions for the lines you are using from the tabio. Mass ofMa ss af Crubile and hydicte Mass of Mass of Ciucible tlid tid 18.8979% - 18.3008g 0.5971 Mass of hydrate (starting material) %3D Mass of MasS Ciralble and residee 18 o6191 Mass of Mass of Crucible trido 18.3008 0.3183 Mass of anhydrous compound (residue) Mass of Mass Crucible a nd Mass ofMa Ss uf Crucible and residueNd 18.8979 18.6191. 0.2788 Mass of water lost %3D 2. Determine the percent salt (M9SO4, by mass) in the hydrate (starting compound): 3. Use the data and calculations above to determine the percent water (by mass) in the hydrate (starting compound). If a different sample of your unknown contained 1.343 g of water, how many grams of MgSO4 would it contain? Use dimensional analysis and the mass percentage calculations from #2 and #3: 4.

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter33: Automated Methods Of Analysis

Section: Chapter Questions

Problem 33.8QAP