Some anions fall into distinctive categories that are specific to their class of ions. Though additional tests may also be necessary to confirm a specific ion, these distinctive categories offer a valuable first step for determining whether a specific anion is present. Match each anion to the characteristic that is most distinctive for confirming the presence of that anion in solution. The anion forms a volatile weak acid upon addition of strong acid. The anion acts as an oxidizing or reducing agent. The anion forms a precipitate under limited conditions. Answer Bank ci SO2- S2 - Soz - NO3 COZ -

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answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.