Образец оксида фосфора (v) растворили в 600мл раствора едкого натра, содержащего 12мас.%naoh и имеющего плотность 1,13 г/мл
гарристайлсс
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20.07.2019 20:40
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2
mВ-ва=678*12/100=81,36г
nNaOH=81,36/Mr=81,36/40=2
P2O5+6NaOH=2Na3PO4+3H2O
Ты не написал что определить? Определим массу соли
mNa2PO4=2*Mr(23*2+95=141=282