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###### JpiPQUESTiON 20Howmany of the following species are Is amphoteric? HPO4 HzoHSO4-HCO;HJPOHHCHH;O2SO32QUESTION 21Which of the following #olutions %s good buffer system? Asclution that i5 130 M HBr and 0.90 M KBr solution that H| 1090 MHl and 90 MNHT Fsolution thal [90 MHI ad 0.050 MNH + Eolution that = 1280 MNaOH and 980 MKOH Ajolution that 650 M HF and 0.6S0MLiF solution that E 730 M HBr and 5 -730 MKBr solution thar E OOSO MHF and OOS0MLiF

JpiP QUESTiON 20 Howmany of the following species are Is amphoteric? HPO4 Hzo HSO4- HCO; HJPOH HCHH;O2 SO32 QUESTION 21 Which of the following #olutions %s good buffer system? Asclution that i5 130 M HBr and 0.90 M KBr solution that H| 1090 MHl and 90 MNHT Fsolution thal [90 MHI ad 0.050 MNH + Eolution that = 1280 MNaOH and 980 MKOH Ajolution that 650 M HF and 0.6S0MLiF solution that E 730 M HBr and 5 -730 MKBr solution thar E OOSO MHF and OOS0MLiF

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