Report on experiment determining the percentage of copper in the copper ore malachite.

Determining the Percentage of Copper in a Copper Ore Aim: To specify the percentage of hog express in malachite. Hypothesis: That the percentage of fleece in the malachite will be four percent. Materials: 2 x 250mL beaker, pestle, malachite, sulfuric acid, wet, 2 x pervade out study, funnel, filter stand, Safety Precautions: insolent safety glasses at all times when exertion with chemicals and apron to avoid wrecking clothes. Method: Record the mass of the malachite sample. Place the malachite into the 250mL beaker and add up 20-30mL of dilute sulfuric acid. handgrip until the reply has slowed down and so gently crush the malachite into beautiful pieces using the pestle. Leave the smorgasbord for about ten transactions stirring occasionally. When there is no sign of further reaction add about 10mL of piddle to the mixture. Allow to settle and therefore filter into the other 250mL beaker. entangle the residue rest in the beaker with 10mL of water and filter this too. afterwards all the liquid has been filtered lag the filter root and unreacted solids. Place a small amount of brand name wool into the beaker and leave retentive. Note the pack of a piece of filter root word. Filter the solution and wash away the solid bullshit remaining on the filter paper with 50mL if water. Discard the filtrate. Allow the filter paper to dry overnight and record the mass.

Results: Mass of Malachite 31.1g Mass of filter paper 1.2g Mass of filter paper and copper color 1.9g Therefore, Mass of copper 0.7g Percentage of copper in malachite sample 2.25% Conclusion: The image into went well and there were very few problems. The only experimental difficulty was during the first time the solution needs to be filtered and the filter paper became choke off up and it took a big time to drain through and through and a small... If you want to profits a full essay, come out it on our website: Orderessay

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