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HCL & 2HCL

HCL 和 2HCL 的分別, 何時要加一個2字. 謝.

解答 0

  • tutor_fran
    2018-10-15 17:10:50
    The formula Of hydrochloric acid is HCL only, but in the reality, gas elements always exist in molecule form (H2, Cl2), they’re not an alone atom (H, Cl).
    Therefore, the equation should be H2 + CL2 → 2HCL, 2HCL means 2moles of HCL, 2 is to to balance the equation.
    refer: https://en.wikipedia.org/wiki/Hydrochloric_acid
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