Enthalpy / kJ mol-14 NH3OHNO3 (s)3 N2O (g)+7H2O (l)+ 2HNO3 (l)4 N2 (g)+8 H2 (g)+ 8 O2 (g)4 x -3673(+8) + 7(-286) + 2(-124)!HANSWERS TO Q1(a) At equivalence point, only NH2OH is formed.NH2OH+H2O NH3OH++OH-OH-! " 1.10x 108x 0.0144 x 0.10.0394pH # $.3%(&) -'H3 is an electron donatin( (roup. )t increases t*e electron density on N atom.Hence, lone pair of electrons on N is more availa&le to form a dative &ond +it* H+.-OH is an electron +it*dra+in( (roup. )t decreases t*e electron density on N atom. Hence, lone pair of electrons on N is less availa&le to form a dative &ond +it* H+.As for ',H-NH2, lone pair of electrons on N is delocali.ed into t*e &en.ene rin( and *ence least availa&le to form dative &ond +it* H+.Hence, stren(t* of &ase of 'H3NH2 / NH2OH / ',H-NH2(c)(i)0H # 1(3,2) + 3(3-) + 2(23,) + 2(-421) # --22 56 mol-47oo*85o585*eon(9Ans+ers to :44(ii) ;H?;= &ecomes more positive) and ;A &ecomes more positive. Beaction &ecomes less spontaneous.(d)(i) 'l2 + 2Cr- D 2'l- +Cr2'l2, &ein( more reactive t*an Cr2 (or &ein( a stron(er oEidi.in( a(ent t*an Cr2), is a&le to displace Cr2 from Cr-. (=upport &y calculatin( F"#ll)(ii) Cr-+H2=O1 DH=O1-+HCrH2=O1 displaces HCr from Cr-2HCr + H2=O1 D Cr2 + =O2 + 2H2OH2=O1 oEidises HCr to Cr2 and itself is reduced to =O2.(iii) 'r2O22-+,Cr-+41H+D 2'r3++3Cr2+2H2O'r2O22-oEidi.es Cr- to Cr2 and itself is reduced to 'r3+.(=upport &y calculatin( F"#ll)(#)GH?? (ii)ExperimentNo. T / KGas X Gas YV / dm3V /Tdm3K1V / dm3V /Tdm3K14 2%% 2% %%% 4%% 4, -%% 32.-2 3%% 22 -%% 2- 2% %%% ,,.23 ,%% 21 %%% 1% 23 -%% 3$.4?*e GH? values of Aas Y deviates more t*an Aas X. Hence Aas Y &e*aves less li5e an ideal (as t*an Aas X. Aas Y is HI +*ic* *as stron(er *ydro(en &onds &et+een molecules +*ile H'l *as +ea5er permanent dipole-permanent dipole interactions. 7oo*85o585*eon(9Ans+ers to :42