sustenance that's not mixed with another sustenance
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a pure substance has a fixed ____ and ____ point
boiling and melting
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how do we know it something is a pure substance (find melting/boiling points)
heat solid until it's temperature stops rising (this is the melting point and because temp stops rising, its a fixed boiling point - solid now a liquid). liquid temp will start to rise again until it stops (this is boiling point - liquid now gas))
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so if a substance melts/boils over a range of temperatures (temp doesn't stop rising, it just slows down as it melts/boils), its...
not pure
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what's a formulation?
complex mixture designed as useful product. quantities been carefully measured to get properties desired (e.g paints, medicines, food, fertilisers, fuels, cleaning products)
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Other cards in this set
Card 2
Front
a pure substance has a fixed ____ and ____ point
Back
boiling and melting
Card 3
Front
how do we know it something is a pure substance (find melting/boiling points)
Back
Card 4
Front
so if a substance melts/boils over a range of temperatures (temp doesn't stop rising, it just slows down as it melts/boils), its...
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