answer 4-7 please thank d) Pb(NO,)-(aq) + 2 HCI(aq) - PbCI,(s)+2 HNO,((aq) 4. Wr
ID: 1046982 • Letter: A
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answer 4-7 please thank
d) Pb(NO,)-(aq) + 2 HCI(aq) - PbCI,(s)+2 HNO,((aq) 4. Write net ionic equations for reactions a), b) and d) only in Q. 1 above 5. a) I state f the following reaction will take place, complete and balance it. If there is no reaction, so AgNO3(aq)+Cu(s) b) Balance the following half reactions: D Vo" (ag)V"(ag) (acidic solution) ii) Cr,O, (aq) Cr'(aq) (acidic solution) 6. Calculate the energy in kJ of one mole of red light with a wavelength 653.3 nm. 7. What is the wavelength of the line in the Balmer series in the spectrum of the hydrogen atom with n 4?Explanation / Answer
5)
a) 2AgNO3(aq) + Cu(s) ----------> 2Ag(s) + Cu(NO3)2
Reduction potential of Ag is higher than reduction potential of Cu, so Ag+ is reduced to metallic Ag.
b)
VO2+(aq) + 4H+ + 2e- ----> V3+(aq) + 2H2O
Cr2O7^2- + 8H+ + 3H2O2 <--> 2Cr3+ + 7H2O + 3O2
6) E = hc / lambda
=> E = 6.625*10^-34 * 3*10^8 / 653.3*10^-9
=> E = 3.04*10^-19 J
=> E = 3.04*10^-22 kJ
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