PROCEDURE Flashcards
Measure between ___ of the unknown sample in the balance.
0.3 and 0.5 g
Add ___ and stir the solution until all the unknown sulfate has
dissolved. Heat the solution until it is nearly boiling.
2 ml of 6M HCI ;
Transfer it to a __ and add enough water to have approximately __
250 ml beaker ; 50
ml in the beaker.
Fold the filter paper into ___ and open it into a cone and place it in the funnel.
quarters
Measure ___ and slowly add it to the unknown solution and stir the solution carefully. Allow the precipitate to settle in the beaker for ___
15ml of 0.25M BaCl2 ; 10 minutes.
Weigh a filter paper using the ____ and record its mass in the data sheet.
Analytical balance
Dampen the filter paper with ___ so it adheres to the cone of the funnel and slit the funnel over a ___
distilled water ; 250 ml Erlenmeyer flask.
Filter the solution into the ___
250ml flask.
After filtration, rinse any remaining ___ in the funnel and
remove the filter paper gently from the funnel by folding it on top of itself.
barium sulfate precipitate
Let the filter paper with the precipitate be completely ___ for at least __ before weighing again.
air dried ; a day
Weigh the air dried filter paper with the precipitate and record its mass in the data sheet.
oke
