In the production of printed circuit boards for the electronics industry, a 0.60-mm layer of copper...

In the production of printed circuit boards for the electronics industry, a 0.60-mm layer of copper is laminated onto an insulating plastic board. Next, a circuit pattern made of a chemically resistant polymer is printed on board. The unwanted copper is removed by chemical etching, and the protective polymer is finally removed by solvents. One etching reaction is:

Cu(NH3)4Cl2(aq) + 4NH3(aq) + Cu(s)  2Cu(NH3)4Cl(aq)

A plant needs to manufacture 10,000 printed circuit boards, each 8.0 x 16.0 cm in area. An average of 80.% of the copper is removed from each board (density of copper= 8.96 g/cm3). What masses of Cu(NH3)4Cl2 and NH3 are needed to do this? Assume 100% yield .

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queen_honey_blossom answered 1 year ago

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