Question

HELP ME>>>>>



Can anybody help me determining the percent of NaCl, CaCO3, & SiO2 in a mixture???? Is there an actual formula to use or what can I use to solve equations of this sort....

Answer 1

Mass of ramekin A 77.1 g
Mass of ramekin + sample B 82.1 g
Mass of sample (Subtract A-B) C -5.0 g
Determining Percent of NaCl in mixture ???
Mass of remekin, and solids (after water washes) D 100.3 g
Mass of NaCl (Subtract D-C) E 105.3 g
Percent of NaCl in unknown (E/C *100) F -2106.0 g
Determining Percent of CaCO3 in mixture: ?????
Mass of dish, lid, and SiO2 (final weighing) G 112.3 g
Mass of CaCO3 ????? H
Percent of CaCO3 in unknown (H/G *100) ?????? I
Determining Percent of SiO2 in mixture: ???????
Mass of SiO2 (Subtract H-G) ??????? J
Percent of SiO2 in unknown ( J/H *100) ???????? K

This is my table and I obviously have a few blank spaces and errors but if you could just help by maybe giving me the equations for determining the percent of ___ in a mixture and telling me if I have any error's so far....

Answer 2

Divide the amount of NaCl you have by the total amount of mixture to get that percent

Answer 3

I don't really know what's going on, what are the solids,?

as the person above me said:

mass percent of NaCl =\(\dfrac{m_{NaCl}}{Total'mass}*100\%\)

Answer 4

The solids are salt, chalk, and sand

Answer 5

Would I use the same formula for solving for SiO2 & CaCO3?

Also what does it mean when finding the "unknown" to a mixture?

I'm not sure how to do those either...sorry

could you walk me through those steps?

@aaronq @DexFrost