Well were doing this unknown lab where we have to seperate sand and salt from a mixture of sand and salt and have the weight in grams of each substance how do you seperate the sand and salt to weigh each and we cant use a sifter-- not that it would help much any way but... How do you go about completing this experiment>> thanks
2007-05-02 03:20:59 · 4 answers · asked by jaimie r 2 in Science & Mathematics ➔ Chemistry
How long do you have to complete the experiment?
Salt dissolves in water. Weigh the water, pour the sand into it, stir everything up, let the sand settle, and pour off the water.
Weigh the water again. The increase in weight is the salt.
You cannot weigh the sand while it is wet, because it weighs more, but if you weighed the sand/salt mixture before you started, and then subtracted off the weight of the salt, then you know how much the sand weighs.
===edit===
I never tried this myself, but it is the best that I could think of.
2007-05-02 03:26:46 · answer #1 · answered by Randy G 7 · 0⤊ 0⤋
Weigh the mixture and record the weight.
Dissolve the salt in water.
Allow the water to drain from the sand
Dry out the sand.
Weight the sand, the difference is the weight of the salt.
Salt (NaCl) will dissolve into a aqueous (water) solution
Sand (SiO2) is not soluble in water.
2007-05-02 03:28:08 · answer #2 · answered by Brian K² 6 · 0⤊ 0⤋
This link has the exact thing you wanted. Good luck with it !
http://www.chemsoc.org/pdf/learnnet/rsc/Kev1-10.pdf
2007-05-02 03:33:30 · answer #3 · answered by The Count 7 · 0⤊ 0⤋
sophisticated factor. lookup in google and yahoo. it could help!
2014-11-25 22:32:06 · answer #4 · answered by Anonymous · 0⤊ 0⤋