Why is a homogeneous mixture not considered a pure substance?
a pure substance can be separated by chemical means, while a mixture can be separated by physical means.
b mixture contains one substance, while a pure substance contains more than one.
c only heterogeneous mixtures are pure substances.
d pure substance can be separated by physical means, while a mixture can be separated by chemical means.
how can a mixture of pigments be separated?
a magnetic attraction
b chromatography
c crystallization
d filtration
which of these is a unique property of acids?
a conducts electricity in solution
b tastes sour
c feels slippery
d contains a carbon
if a solution feels slippery and has a ph of 12, what is the solution?
a acidic
b neutral
c saturated
d basic
which of these is an acid?
a water
b lye
c naoh
d vinegar
what does ph measure?
a concentration of hydroxide ions in solution
b number of hydrogen atoms in an acid
c number of hydroxide atoms in a base
d concentration of hydrogen ions in solution
solutions with high ph values have which of these properties?
a tastes sour
b urns litmus paper red
c feels slippery
d gives off hydrogen gas when reacted with metal
acids turn litmus paper what color?
a blue
b red
c yellow
d pink
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Why is a homogeneous mixture not considered a pure substance?
a pure substance can be s...
a pure substance can be s...
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