Measure the mass of about one gram of your alum sample into a 250 mL beaker. Add
ID: 807032 • Letter: M
Question
Measure the mass of about one gram of your alum sample into a 250 mL beaker. Add about 50 mL of distilled water to the beaker of alum and stir the mixture to dissolve the entire solid.
15. Calculate the volume of 0.20 M Ba(NO3)2 solution that is needed to completely precipitate the sulfate ions in the beaker of alum solution. Measure out twice the volume that you have calculated, and slowly add it to the beaker of alum solution. Stir the mixture to ensure complete mixing of the reagents. CAUTION: Handle the barium nitrate solution with care. This solution is toxic.
Write the molecular and net ionic equations for the reaction in Part III. Basically I need the reaction between Ba(NO3)2 and Alum and H20
Explanation / Answer
Molecular equation
KAl(SO4)2.12 H2O (aq) + 2 Ba(NO3)2 (aq) -----> KNO3 (aq) + Al(NO3)3 (aq) + 2 BaSO4 (s) + 12 H2O (l)
Net ionic equation
2 SO4 (aq) + 2 Ba (aq) -----> 2 BaSO4 (s)