Asolution is prepared by dissolving 10.8 g ammonium sulfate in enough water to make 100.0 ml of stock solution. a 10.00- ml sample of this stock solution is added to 50.00 ml of water. calculate the concentration of ammonium.

Concentration ammonium is 0.036 g/mL

Explanation:

Stock solution has concentration of 0.108g/mL. Take 10mL stock solution and add 50 mL of water meaning it has 1,08g/60mL. Ammonium sulfate has 2 molecules of cation ammonium cation. So, (1,08g/60mL.)*2=0.036 g/mL

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