Do Water Vapors Effect the Mass of Copper (II) Sulfate?

Do Water Vapors Effect the Mass of Copper (II) Sulfate?

The pentahydrate form, which is blue, is heated, turning the copper sulfate into the anhydrous form which is white, while the water that was present in the pentahydrate form evaporates. I wanted to know if water vapors affect the mass of copper sulfate.

Things you’ll need: crucible, balance, Copper (II) Sulphate, spoon, alcohol lamp, and stand.

IMG_20140101_133233

  1. Weigh the crucible and tare it. After that, put 5 grams of copper (II) sulfate into the crucible. My crucible weighs 50.41 grams as shown on the bottom.IMG_20140101_133307IMG_20140101_133513
  2. Warm it up until it turns whiteIMG_20140101_134156
  3. Let everything cool off and weigh the crucible.

I had an error during this experiment… The balance’s batteries are out… So I had to take the copper sulfate out and reweigh the crucible. One of my epic fails…

IMG_20140101_135544

Crucible: 50.41 grams

Copper (II) Sulfate: 5.00 grams

Anhydrous Salt: 3.43 grams

Mass loss: 1.57 grams

I pour in some water to get to the original mass, and it appears that I poured in about 1 and a half ml of water.

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