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Name: EXPERIMENT 2: Due the beginning of lab. PRE-LABORATORY ASSIGNMENT Lab Section: Score: 19 27.296 1. A student obtains the following data: Mass of crucible: Mass of crucible and hydrate: Mass of crucible and anhydrous residue after heating 28.566 28.05 The laboratory instructor identifies the sample as strontium chloride hydrate (Src, nH.0) a) Calculate the mass percent of water in the hydrate? Answer: b) Calculate the number of moles of water in the hydrate sample that were driven off by heating? Answer: Adapted from Advanced Chemistry Using Vernier Page 1 of 7 CHEM 1E: Experiment 2 Crawford Determination of a Chemical Formula c) Calculate the mole ratio of water to salt in the hydrate, round to the nearest whole number ("n" in SrC, H,0) Answer: d) Write the correct formula for the hydrate? Answer: Adapted from Advanced Chemistry Using Vernier Page 2 of 7