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The set up below was used to investigate the reaction between dry hydrogen gas and copper (II) oxide.

      

The set up below was used to investigate the reaction between dry hydrogen gas and copper (II) oxide.
13copperoxide4720171050.jpg
a) Name substance A.
b) State the observation made in the combustion tube.
c) Explain the observation stated in (b) above.

  

Answers


John
a) Anhydrous calcium chloride

b) Copper (II) oxide turns from black to brown

c) Hydrogen gas reduces copper (II) oxide to copper metal which is brown.
johnmulu answered the question on April 7, 2017 at 08:57


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