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19 mult choice
Farmingdale rarmimguaie 19. Which can account for a pH at the equivalerice poiht of 8.5 when a 1.0 M acidic solution is titrated with a 1.0 M basic solution? 1) HNO2 and NaOH 2) HBr and KOH 3) HNO, and NH, 4) HCI and NaOH 20. Which are conjugate acid-base pairs? NH,(aq) + H,Se(aq) ←→ HSe-(aq) + NH4+(aq) I. HSe and NH3 II. NH, and NH III. H,Se and HSe V. H,Se and NH H2Se and NH, I) Il and IV only 2) I and Il only 3) Il and II only
Expert Answer
Answer
Mixture of 1 molar NaOH + 1 molar HNO2
when mixed with each other It gives a pH account of 8.2 because NaOH is strong base while HNO2 is weak acid so the mixture becomes basic in nature and the pH will be 8.2
