Group No.
Members:
1. ____________________________
2 ____________________________
3.
4.
5.
Date Performed:
Instructor’s Initial: ________________
Data Results:
1. Mass of paper box
Mass of NaCl
Mass of paper box and NaCl
2. Filtrate
________________________________________________________________________________________
3. Comparison of results of decantation and filtration
Method
Decantation
Filtration
Results
Principle behind
4. From the whole activity, list three (3) precautions from all preceding procedures
and reasons why these should be followed
Precautions
Reason
Answers to Questions:
1. Why should objects never be weighed while still hot?
2. Cite the reasons for the use of glass-stoppered bottles for acids and
plastic-stoppered bottles for bases.
3. Why should excess chemicals never be returned to reagent bottles?
4. Which is the more effective method of separation, decantation or filtration?
Explain.