pure substances Flashcards
1
Q
chemistry pure substance
A
a single element or compound,
not mixed with any other substance
2
Q
everyday pure substance
A
a substance that has had nothing added to it, so it is unadulterated and in its
natural state
3
Q
what is special about pure substances?
A
they melt and boil at specific
temperatures
4
Q
how can you distinguish pure substances from mixtures?
A
by measuring its melting or boiling point and comparing with the melting or boiling point of the pure substance
5
Q
closer value to actual mp/bp meaning
A
purer sample
6
Q
what can impurities do in mixtures?
A
lower melting point, increasing melting range, increase boiling point, sample boils over a range of temperatures
