In this Lab we had to do a mixture of sand,salt, and iron and the total mass of the mixture of the three things had to be about 50 grams. We used the Electronic balance to measure the mass of each things, we put it into the cup and mix it all together. After that we had to come up with a plan of how to take all of each things out, how to separate all of them. To separate the Iron from the other things we use the magnet to get the iron out because the iron is magnetic, then we put it in the cup and weighed it to get the mass. Then we place the other two sand and salt into a beaker, added water,stir and the salt dissolved. we used a filter paper to filter the sand from the salting water and then we put it into the microwave to dry it. Then the salting water was in a beaker we heated it up and the salt turned back to solid and then we weighed it and we also weighed the sand.
In this lab, the amounts of sand that we had at the beginning was 23.78% (10.52 g), the amount that we recovered was 11.45g. It wasn't equal we probably didn't recover everything when we were filtering the sand from the salting water.For the Iron we had at the beginning 49.71% (22.00g), the amount that we recovered was 22.78g i think its bigger because we might have took some sand out too when we were taking the iron with the magnet or maybe the magnet already had some iron on it, i think if we had did it twice we were not going to have this amount of Iron when we were recovering it.The salt was 26.47%(44.23g) at the beginning and at the end it was 22.78g isn't equal maybe because when we heated it,the mass went down or maybe because it went from a liquid phases to a solid phases.
In this lab,If there was tiny pieces of sand in our Iron what we could have done was take everything off the magnet and put it in the cup and retry again. After we could have try to use our hands to take the little tiny pieces of sand that we could see and try again with the magnet for the last time.Or if there was iron on are magnet we could had used a Ziploc back it was going to help to get the iron off the magnet.
The lab is related to what we're doing in class, because you had to measure the mass, find the %Error,also the % of total which is what we're currently doing in class, mixture and pure substances. The Question that i have is did we did this lab to get better with measurement and solving math problems or to understand how purification work.?
Enrichment : Steps used for purification of water since water is a chemical.
-Aeration
-Flash mixing
-Flocculation
-Settling
-Filtration
-Additives
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