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Design an experiment to accurately determine the empirical formula of a given hydrate. Predict how experimental factors will impact the accuracy and precision of results. Calculate the molar ratio of water to anhydrous solid to determine the hydrate's formula.
- 1.7: Experiment 6
Design an experiment to accurately determine the empirical...
- 1.7: Experiment 6
AS PRACTICAL 1 Water of crystallisation (Model) Aim. I am trying to find the value of n in the hydrated salt MgSO4.xH2O. Method. I will find the mass of a clean, dry boiling tube on a balance with resolution of 0.01 g or better.
In this experiment, you will be given a sample of hydrate. You will determine the mass of the water driven off by heating, as well as the amount of anhydrous salt that remains behind. Then, given the mass of one mole of the anhydrous salt, you will determine the empirical formula of the hydrate.
7 Αυγ 2011 · The formula of the anhydrous salt is known, so its formula weight can be calculated. The weight of the material in the crucible after heating can then be used to determine the number of moles of the anhydrous salt. Comparing these two mole numbers gives the complete formula of the hydrated salt.
Design an experiment to accurately determine the empirical formula of a given hydrate. Predict how experimental factors will impact the accuracy and precision of results. Calculate the molar ratio of water to anhydrous solid to determine the hydrate's formula.
Answer key. Problem #1: A 15.67 g sample of a hydrate of magnesium carbonate was heated, without decomposing the carbonate, to drive off the water. The mass was reduced to 7.58 g. What is the formula of the hydrate? Solution: 1) Determine mass of water driven off: 15.67 minus 7.58 = 8.09 g of water.
In this experiment, hydrated salts will be heated. First, we will perform a qualitative test with the hydrate CuSO 4.5H 2 O (blue in color), whereby heat is applied until the hydrate becomes anhydrous CuSO 4 (white in color). Next, the resulting liquid will be tested with anhydrous CoCl 2 to detect if that liquid is water.
