A solution may contain the following ions Ag , Cu 2 , Mn 2 , Ca 2 , and Na . No precipitate formed when 0.10 M NaCl was added but a dark colored precipitate formed when H 2S was added to an acidic portion of the solution. After the removal of the solid the solution was made basic and more H 2S was added and a dark precipitate again formed. Treatment of the filtrate with (NH 4) 2CO 3 resulted in a white precipitate. If no further tests were made then what conclusions can you draw

Explain why pure hydrogen cyanide does not conduct electricity, but become a conductor when it is dissolved in water? (at room temp, pure hcn exists as a volatile liquid)

You mix the pks of succinic acid are 4.21 and 5.64. how many gramsa graduate student at sdsu wants to measure the activity of a particular enzyme at ph 4.0. to buffer her reaction, she will use a buffer system based on one of the acids listed below, which acid is most appropriate for the experiment? of monosodium succinate (fw = 140 g/mol) and disodium succinate (fw = 162 g/mol) must be added to 1 l of water to produce a solution with a ph 5.28 and a total solute concentration of 100 mm? (assume the total volume remains 1 liter, answer in grams monosodium succinate, grams disodium succinate, respectively.) volumes of 0.05 m nah2po4 and 0.05 m na2hpo4 (pk's for phosphoric acid are 2.15, 6.82 and 12.38). which of the following best describes the resulting solution?

What are the two largest greenhouse gases