You need your lab notebook!!. A note on assignments. Late homework is worth 50%. I will not stamp the date on it. BE ORGANIZED!! Keep your notebooks in one place (on your shelf). Keep a separate notebook for each class.
(removes water from a sample)
Drying oven (removes water from a sample quickly)
Record a qualitative description.
How would you separate this mixture (and record the mass of each compound after separation)?
If you do not turn in this assignment, you will not be allowed to participate in lab.
Residue – manganese dioxide
Reacts with HCl acid, turns moist KI paper blue
Solute – sodium chloride
Reacts with AgNO3 solution to form white precipitate
Add to your procedure to fix these problems!!
Wet the filter paper with distilled water from the wash bottle before filtering.
When the salt looks dry, mass the dish + salt. Heat it a little longer, and mass it again. Repeat, until the difference in mass is less than 0.01 grams.
Mass the filter paper and evaporating dish at the beginning. At the end, mass the filter paper + MnO2 and the evaporating dish + NaCl. Then, just subtract!!