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A leaked copy of a government report on climate change says that since 1948, Canada's annual average temperature over land has warmed 1.7 C, with higher rates seen in the North, the Prairies and... read more
Introduction In this demo, the teacher creates a beautiful rainbow of colours in a demonstration tube using universal indicator and a dilute acid and base. Discussion Universal indicator can be used... read more
Every chemical in the academic laboratory can be toxic under some set of exposure conditions. However, the reverse is also true—every chemical has some set of exposure conditions in which it is... read more
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