Question
Asked Oct 15, 2019

27) The cycle of copper reactions illustrates important principles of chemical reactions. The cycle begins with elemental copper, which in a first reaction is oxidized to copper(II) cation. Copper(II) is then carried through different solid forms. In the last step, copper(II) cation is reduced, the copper metal is regenerated, and the cycle is closed. The five key steps are (see attached picture). Assume that you want to carry out a sequence of cycle reactions. 

b) What volume of 16M HNO3​ solution provides the required amount of the acid?

 

 

3Cu2 (aq)4H20 2NO
Cu(OH)2(s)
1. ЗСи(s) + 2NO; + 8H-
2+
2. Cu (aq) 20H (aq)
Cu(OH)2 (s) CuO (s) H20
4. CuO(s)2H Cu2
Cu2 (aq)Zn(s)
(aq)H2O
Zn2 (aq)Cu(s)
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3Cu2 (aq)4H20 2NO Cu(OH)2(s) 1. ЗСи(s) + 2NO; + 8H- 2+ 2. Cu (aq) 20H (aq) Cu(OH)2 (s) CuO (s) H20 4. CuO(s)2H Cu2 Cu2 (aq)Zn(s) (aq)H2O Zn2 (aq)Cu(s)

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Step 1

The balanced equation is given below.

3 Cu 8HNO
3Cu(NO)2+2NO +4H2O
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3 Cu 8HNO 3Cu(NO)2+2NO +4H2O

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Step 2

Three moles of copper react with eight moles of nitric acid. Suppose, 2.51 g of Copper is taken in the firs...

Mass
Number of Moles of Cu=-
Molar mass
2.51g
63.546 g/mol
0.0395mol
8 mol HNO
Moles of HNO = 0.0395 mol Cu x-
0.105mol
3mol Cu
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Mass Number of Moles of Cu=- Molar mass 2.51g 63.546 g/mol 0.0395mol 8 mol HNO Moles of HNO = 0.0395 mol Cu x- 0.105mol 3mol Cu

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