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0,2 x
H2SO4+K2CO3=K2SO4+CO2+H2O
1 1
m(K2CO3)=m(р-ра)хω=110х0,25=27,5 г.
n(K2CO3)=m/M=27,5÷138=0,2 моль
n(CO2)=x=0,2х1÷1=0,2моль
V(CO2)=Vmхn=22,4л./моль×0,2моль=4,48л.
ответ: 4,48л.
Р(NaOH)=2,165г/См
M(ве-Ва) (NaOH)=V*W*P=80*0,16*2,165=27,7гр
Масса(р-ра)(NaOH)=27,7/0,16=173гр
Просто проверяем:
W=M(ве-ва)/М(ра-ра)= 27,7/173*100=16%
ответ масса растворенного вещества = 27,7 гр