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EXPERIMENT 7: HYDRATES. Introduction: You will determine the percentage of water in a hydrate and the empirical formula of a hydrated salt. Background: Hydrates are chemical compounds that contain water as part of their crystal structure.
- Experiment 4 Formula of a Hydrated Salt Introduction
In this experiment a hydrated salt will be heated to...
- Experiment 4 Formula of a Hydrated Salt Introduction
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.
Hydrate Salts. Hydrate salts have chemical formulae such as OsCl3·3 H2O (osmium (III) chloride trihydrate) or Cs2S·4 H2O (cesium sulfide tetrahydrate). In these formulae, the dot indicates a weak chemical bond that is easily broken by heating the sample.
Experiment 1 ∙ Hydrates 1‐3 In this experiment we determine the formula of a hydrate. Hydrates are salts that incorporate water in their crystal struc‐ ture. Simple hydrates have the generic formula MB·xH2O(s), where M represents a positively charged ion (e.g.,
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.
In this experiment, hydrated salts will be heated. First, we will perform a qualitative test with the hydrate CuSO4.5H2O (blue in color), whereby heat is applied until the hydrate becomes anhydrous CuSO4 (white in color). Next, the resulting liquid will be tested with anhydrous CoCl2 to detect if that liquid is water.
In this experiment a hydrated salt will be heated to constant weight, removing the water of hydration. The loss of weight will be the weight of water present in the original salt.
