PLEASE HELP DUE MONDAY MORNING, KINDLY SHOW ALL WORKINGS AND CALCULATIONS. (1).

Question

PLEASE HELP DUE MONDAY MORNING, KINDLY SHOW ALL WORKINGS AND CALCULATIONS.

(1). Suppose you have a solution that might contain any or all of the following cations: Cu2+, Ag+, Ba2+, and Mn2+. The addition of NBr causes a precipitate to form. After the precipitate is separated by filtration, H2SO4 is added to the supernatant liquid, and another precipitate forms. This precipitate is separated by filteration, and a solution of NaOH is added to the supernatant liquid until it is strongly alkaline. No precipitate is formed.

(a). Which ions are present in each of the precipitates?

(b). Which cations are not present in the original solution?

Explanation / Answer

After the addition of HBr, only Ag+ ion will react with HBr to form the precipitate of AgBr

The addition of H2SO4 will form the precipitate of BaSO4, which is a thick white precipitate

a) Ions are present in each of precipitates are

Ag+ and Ba(2+)

b)Cations not presents are Cu(+2) and Mn(+2)

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