The equation 10HNO3 + 3CuS -> 3Cu(NO3)2 + 5H2O + 5NO + 3SO2

  1. Detailed information about the equation 10HNO3 + 3CuS -> 3Cu(NO3)2 + 5H2O + 5NO + 3SO2:

    • The chemical equation above describes the redox reaction between nitric acid (HNO3) and copper sulphide (CuS).
    • According to the equation, 10 moles of HNO3 will react with 3 moles of CuS to form 3 moles of Cu(NO3)2, 5 moles of H2O, 5 moles of NO and 3 moles of SO2.

  2. Reaction conditions:

    • The conditions for the reaction to occur require the presence of light, appropriate temperature and pressure.
    • HNO3 needs to have enough concentration to drive the reaction.

  3. Reaction process:

    • First, HNO3 reacts with CuS to form Cu(NO3)2 and releases H2O, NO, SO2.
    • H2O, NO, SO2 are released into the air during the reaction process.

  4. Phenomena occurring:

    • When the reaction occurs, NO and SO2 gas will be released into the air, creating a characteristic smell.
    • The Cu(NO3)2 formed is a blue solid substance.
    • The change in color of the reaction mixture indicates the occurrence of the chemical reaction.

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