Copper sulfate, hydration

You obtained the mass percent of water in the copper sulfate hydrate. 

Compare the formula that you obtained for the copper sulfate hydrate with the formulas that other groups obtained. Are there any differences How might these differences have occurred ... 

A tube of glass 60 cm high is closed at one end, blue copper sulfate hydrate crystals are placed at the bottom, and water is introduced. Calculate how far a blue color will have spread upward after 1 min, 1 day, 1 week, and 1 month. 

Using a spatula, add approximately 5 g of copper sulfate hydrate crystals to the crucible. Break up any large crystals before placing them in the crucible. Determine the mass of the covered crucible and crystals to the nearest 0.01 g, and record the mass in your data table. 

Drawing conclusions Using your answers from items 3 and 4, determine the empirical formula for the copper sulfate hydrate. 

Problem Because the light blue color of the solid copper sulfate hydrate is identical to the aqueous solution, students should be convinced that the... 

Material Test tubes, burner, copper sulfate hydrate (CuS04 5 H20). 

Procedure Fill a test tube with several spatula tips of copper sulfate hydrate and clamp the test tube slanted pointing downwards. Heat the salt intensely. Cool the white salt and then add several drops of water. 

Tip If portions of the substances are quantitatively weighed before and after the experiment, one achieves a good result, which shows the contents of 5 mol water molecules per mol copper sulfate hydrate, thereby establishing the existence of copper sulfate pentahydrate. 

Material Beakers, test tubes, plastic pipettes, measuring cylinders (100 ml), scales copper sulfate hydrate, 2-M hydrochloric acid, ammonia solution (25% solution, diluted 1 50). 

Figure 17.1. A thermogravimetric curve for the dehydration of copper sulfate hydrate. 

Copper was electroplated on copper-coated poly-p-phenylene terephthalamide by the following method. A section of copper-coated poly-p-phenylene terephthalamide fibers weighing 0,031 g was attached to the negative terminal of a 6 volt battery, and the fibers were immersed in a solution of 30 g of copper sulfate hydrate in 300 mL of deionized water. A coppper wire was attached to the positive terminal of the battery and... 

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