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Need really big help relating to Gravimetric Analysis


yousuf89

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An experimental alloy contained by copper and tantalum of the alloy was dissolved and analyzed gravimetrically.

 

a) the copper was precipitated and weighed as CuO, a mass of 0.1739g was obtained. Calculate the %w/w Cu in the alloy.

 

b) the tantalum was precipitated and weighed as Ta2O5, a mass 0.4748g was obtained. calculate the %w/w Ta in the alloy.

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A mole is not just no. of atoms or molecules in a substance.A mole can be defines as a chemical mass unit, defined to be 6.022 x 1023 molecules, atoms, or some other unit. The mass of a mole is the gram formula mass of a substance.

gram formula or atomic mass of CuO is 79.545 g/mol and that is of Ta2O5 is 441.893 g/mol, Cu=53.55g/mol and Ta=180.95g/mol

No. Of. Moles of a substance = Mass of that substance in grams/gram formula mass of that substance

I think you can do it further..... Good luck for your Xams....

Edited by Chembio
Consecutive posts merged.
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