3.106 Copper is an excellent electrical conductor widely un in making electric circuits. In producing a printed circ board for the electronics industry, a layer of copper laminated on a plastic board. A circuit pattern is th printed on the board using a chemically resistant pc mer. The board is then exposed to a chemical bath t reacts with the exposed copper, leaving the desired c per circuit, which has been protected by the overlay polymer. Finally, a solvent removes the polymer. One action used to remove the exposed copper from the cuit board is Cu(s) + Cu(NH),Cl2(aq) + 4 NH3(aq) - 2 Cu(NH3)CH A plant needs to produce 5000 circuit boards, each w a surface area measuring 2.0 in. x 3.0 in. The boards covered with a 0.65-mm layer of copper. In subsequ processing. 85% of the copper is removed. Copper he density of 8.96 g/cm'.Calculate the masses of Cu(NE Cl2 and NH3 needed to produce the circuit boards. suming that the reaction used gives a 97% yield.

3.106 Copper is an excellent electrical conductor widely un in making electric circuits. In producing a printed circ board for the electronics industry, a layer of copper laminated on a plastic board. A circuit pattern is th printed on the board using a chemically resistant pc mer. The board is then exposed to a chemical bath t reacts with the exposed copper, leaving the desired c per circuit, which has been protected by the overlay polymer. Finally, a solvent removes the polymer. One action used to remove the exposed copper from the cuit board is Cu(s) + Cu(NH),Cl2(aq) + 4 NH3(aq) - 2 Cu(NH3)CH A plant needs to produce 5000 circuit boards, each w a surface area measuring 2.0 in. x 3.0 in. The boards covered with a 0.65-mm layer of copper. In subsequ processing. 85% of the copper is removed. Copper he density of 8.96 g/cm'.Calculate the masses of Cu(NE Cl2 and NH3 needed to produce the circuit boards. suming that the reaction used gives a 97% yield.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

3.106 Copper is an excellent electrical conductor widely used
in making electric circuits. In producing a printed circuit
board for the electronics industry, a layer of copper is
laminated on a plastic board. A circuit pattern is then
printed on the board using a chemically resistant poly-
mer. The board is then exposed to a chemical bath that
reacts with the exposed copper, leaving the desired cop-
per circuit, which has been protected by the overlaying
polymer. Finally, a solvent removes the polymer. One re-
action used to remove the exposed copper from the cir-
cuit board is
Cu(s) + Cu(NHy),Cl2(aq) + 4 NH3(aq)
-
2 Cu(NH)C(ag)
A plant needs to produce 5000 circuit boards, each with
a surface area measuring 2.0 in. x 3.0 in. The boards are
covered with a 0.65-mm layer of copper. In subsequent
processing. 85% of the copper is removed. Copper has a
density of 8.96 g/cm'.Calculatethe masses of Cu(NH3)4
Cl2 and NH3 needed to produce the circuit boards, as-
suming that the reaction used gives a 97% yield.

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