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Write Chemical Formula for Hydrofluoric Acid
《问化学之氢氟酸化学式》
一日,有学童问于师曰:“敢问氢氟酸之化学式若何写之?”师曰:“氢氟酸者,乃氟化氢之水溶液。氢者,符号为H;氟者,符号为F。二者化合,其化学式写作HF。此乃因其氢显+1价,氟显 - 1价,依化合价代数和为零之则,故成此式。”学童闻之,恍然大悟,曰:“多谢师之教诲,吾已知氢氟酸化学式为HF矣。”
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