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Answer to Question #146575 in General Chemistry for edwin damian
Question #146575
In an experiment to determine the proportion of oxygen in air, Copper turning were packed in
excess in a long combustion tube connected to two syringes of 120cm3 each in a volume . Syringe R
contained 120cm3 of air while syringe S was closed and empty as shown.
excess in a long combustion tube connected to two syringes of 120cm3 each in a volume . Syringe R
contained 120cm3 of air while syringe S was closed and empty as shown.
Expert's answer
The copper turnings were packed in excess so that they could react with all the oxygen in the tube.
In the combustion tube the brown metal changes to black.
"Cu+ 0_2 \\to2CuO"
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