Today we started Day 1 of the Separating Mixtures Lab. Before heading to the back, however, we went over the pre-lab (which MUST include a pre-made data table!). We concluded that the best way to separate a mixture of salt, water, and sand would be to pass the solution through filter paper to catch the sand and collect the remaining salt water in a beaker. Then one would heat that beaker until the water evaporated, leaving the salt at the bottom of the beaker.
Mr. Lieberman then explained to us how mass percent works. For pre-lab question number two we found the answers to be 57.07% salt and 42.93% sand. This answer was reached by dividing the amount of tons of each substance by the total tons (when added together). For number three the answers were 171.875 pounds of flour and 103.125 pounds of sugar. This was achieved by multiplying the total (275 pounds) by .625 to get 171.875 and then subtract that from 275 to get 103.125. (Or you could use the algebraic way, but it is more difficult in my opinion.)
(Iron, salt, sand) (The filtering apparatus)
(The sand that couldnt pass through
the filter, now on a hot plate)
Mr. Lieberman then showed us all the materials we would be using for the lab were, and how to set up the filter paper. (Fold in half twice and then pull one "flap" to make a "pocket.")
Here is my data table from the lab...
Our homework tonight is to write out the procedure or steps for Part B of the lab, as well as finish the http://webassign.net/ . Mr. Lieberman won't be there tomorrow so we need to be on our best behavior for the sub. We will be finishing the lab. The next scribe is...Takashi I.
1 comment:
Separating mixtures can be difficult, you should have good knowledge about separating mixtures when you are looking to separate mixture and information you shared is good.
cuvette
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