Question

In order to assess whether your experiment was successful we need to think about the purity of our product.

Which of the following parts of this experiment would give us an idea on the purity of our product?

a. Boiling Point

b. Solubility in water

c. Melting Point

d. Percent yield

e. Making an LCD

Answer 1

all will help:

a)

boiling point is unique range ofr a pure subtance

if the range is not present, then this is not pure

b)

solubility should be constant for a given Temperature/volume if less mass solublilizes, then this is not pure

c)

melting point, as boiling point, will be changed in range (decreases) if impurity is present

d)

% yield relates directly on the total amount obtained, if % yiel dis low, there is lots of impurities, if it is high, it can be assumed to be pure