Question

A Sequence of Chemical Reactions 5 Identify the following equations as single or double displacement, redox, acid-oues combination, or decompostion reactions. Some may fit in more than one category. Cu(s) + 4HNO, (aq) → Cu(NO)/(aq) + 2NO, + 2H,0 b. Mg(s) + H,80 (aq) - MgSO (aq) + H/ Cu(s) + HCl(aq) → CuCl(aq) + H,00 d. Cu(NO),(aq) + 2NaOH(aq - Cu(OH)(s) + 2NaNO, (aq) Cu(NO)/aq) + Mg(s) > Mg(NO/(aq) + Cu(s) A student dissolved a piece of copper wire, then converted it to Cuo, filtered the Cuo from solution, and determined the mass of the Cuo. The CuO was then dissolved, reduced to copper metal, and recovered. Calculate the percent yield for CuO and Cu from the following data: Mass of the copper wire Mass of filter paper Mass of filter paper + Cuo Mass of filter paper Mass of filter paper + Cu 0.260 g 0.525g 0.834 g 0.490 g 0.732 g % Yield Cuo % Yield Cu

Answer 1

13. a) Cu +4 H NOG cutt → Cu (NO3), + 2 NO2 1 + 2 H₂O It is a single displacement reaction. As Nos of Hnog is displaced by a and produce in (NO3)2 It is also a reedox reaction t Oxidation Cu + 4 H Cu(NO3)2 + 2NO+H2O Reduction Oxidation takes place in ce which converts to cut 2 and reeduction takes place in HNO3 which converts to Non b) ng + H₂SO ng soathi It is a single displacement reaction AS SOA2 of 42.50 is displaced by ing and produce ug soa.

c) cuo +HU → Culla +H₂O It is a double displacement : reaction. As i ofhu is displaced by ano and produce cucle.o² of ano is displaced by HU, and produce 4,0. .. It is an acid-base reaction. cuo is weak base which reacts with acid hu and form stable cu uz salt and water d) Cu(NO3)2 + 2NaOH → Cu (O) 2 + 2Na ng It is a double displacement reaction. Nos of cu(NO3)2 is: displaced by NaOH and form Na noz. Oh of Naoh is displaced by cu(NO3). and form an (OH)2

e) Cu(NO3)₂ + ug ug (NO3)2 the It is a single displacement reaction. Reduction It is a reedox reaction an (NO3) trig rig (Nos), tlu oxidation Here aut converts to m.. It is reduction and ug converts to uge? It is oxidation. ...