Chemistry, 19.03.2020 02:35 NANA2007

Today chlorine is prepared from sodium chloride by electrochemical decomposition. Formerly chlorine was produced by heating hydrochloric acid with pyrolusite (manganese(IV) oxide, MnO2), a common manganese ore. Small amounts of chlorine may be prepared in the laboratory by the same reaction: 4HCl(aq) + MnO2(s) → 2H2O(l) + MnCl2(aq) + Cl2(g) How many grams of HCl react with 5.18 g of manganese dioxide, according to this equation?

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Today chlorine is prepared from sodium chloride by electrochemical decomposition. Formerly chlorine...