Suppose you have a solution that might contain any or all of the following cations: cu2+, ag+,ba2+ and mn2+. the addition of hbr causes a precipitate form. after the precipitate is separated by filtration, h2so4 is added to the supernatant liquid, and another precipitate forms.

The solution formed a precipitate when HBr is added. This indicates that the cation present would be silver ion(Ag) as silver forms an insoluble precipitate with bromide ion.

The equation representing the formation of silver bromide precipitate is:

Bromides of all the other cations,are soluble in aqueous solutions.

After removing the precipitate of AgBr by filtration, the supernatant solution is treated with and another precipitate forms. This would be due to the presence of ions as barium sulfate is an insoluble precipitate.

The equation representing the formation of barium sulfate precipitate is:

answer: a tank of height h is filled with water and sits on the ground. water squirts from a hole at a height y above the ground and has a range r. for two y values, 0 and h, r is zero. determine the value of y for which the range will be a maximum.

explanation: