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Study the setup in the Figure below and then answer the questions that follow.

  1. At the end of the experiment, solid B changed from white to blue. Explain.
  2. The other product of the burning candle formed a white precipitate with the calcium hydroxide solution. Write an equation for the reaction. 
  3. State the role of apparatus C. 

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  1. Solid B becomes hydrated hence turns from white to blue 
    Burning candles produces water which combines with solid B to make it hydrated
  2. CO2(g) + Ca(OH)2(aq) → CaCO3(s) + H2O(l)
  3. To suck the gaseous product from the system 
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