Separation Mixtures Lab Day Two

Hey guys I'm little late. On Friday we had sub teacher, Mrs. Zalatimo, and we start separation Lab Part B. Each group hadfollowed their Procedure which was homework.

For this lab we were going to separate heterogeneous Mixture iron, sand, and salt. I measure each of masses and calculate percentage.

Most of groups used magnet to take out iron. Then, we mixed the mixture with water and used the filter paper to take out sand.

Then, most of the groups heat the filter paper to take out moist from sand. After that we could easily measure the mass of sand and subtracted each mass of iron and sand from total mass.

However, some of the group triedto boil the left liquid which is mixture of water and salt to find salt. I thought this was going to work and we can find the salt, but the water started explode and we couldnt get salt.

Our homework over the weekend is to answer the post lab questions from Separation Lab and pre lab question from What Chemical Reaction Lab.

Boiled salt

And next scribe is .......Faith S.

Separating Mixtures Lab Day One

Hey guys sorry for the late post I just got home from marching band. Anyways...

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.