На нейтрализацию 3, 655г фосфорноватистой кислоты(h3po2) израсходовано 2, 222г гидроксид натрия. вычислитемолярную массу эквивалентов и основность кислоты. составьте уравнение реакции

ответ:

объяснение:

  6,9 г                                                                       х г

  2na         +         2h2o       =       2 naoh       +     h2

n=2 моль                                                               n=1 моль

м=23 г/моль                                                         м = 2 г/моль

m=46 г                                                                   m=2 г

6,9 г   na     -     х г   н2

46 г   na   -     2 г   н2

m(h2) = 6,9 * 2 / 46 = 0,3 г

ответ:

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