the water (g)
mass of NaCl obtained after boiling away the
The amount of sodium chloride in the original mixture can be
determined indirectly by subtracting the masses of
ammonium chloride and sand from the initial mass of the
powdered mixture. Calculate the percent difference between
the results from the two methods using the following
% difference = |(measured mass) − (mass by subtraction)| /
(mass by subtraction) × 100%
The amount of sodium chloride cn be found in the original mixture by
subtracting the mass of NH4Cl (1.222g) and SiO2 (6.158g) from
theoriginal 10g which leaves me with 2.62g for the NaCl.
NaCl was measured on the scale,
it's mass was 87.620g with
beaker meaning the NaCl alone weighed 2.62g. If
used in the
would show a
difference of 0%.
How is this lab using the difference in the physical properties
of the powdered mixture components to separate them?
Suppose a student is given 5.375 g of a powdered mixture to
separate. Because the mixture contains iron shavings, he
decides to separate them using a magnet. He obtains 1.824
g of iron. What is the mass percent of iron in the mixture?