Amixture contains only nacl and al2(so4)3 . a 1.45-g sample of the mixture is dissolved in water, and an excess of is added, producing a precipitate of ‍ al(oh)3. the precipitate is filtered, dried, and weighed. the mass of the precipitate is g. what is the mass percent of ‍ in the sample?

Explanation:

Due to the lack of mass of result, I propose the correct form of solution for this answer. Keep in mind that to obtain the answer we must know molecular weights and as well stechiometry. it is shown also the correct stechiometry for the rxn.

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