H2SO4+2NaOH=Na2SO4+2H2Om(NaOH)р-ра=250*1,2=300г;
m(NaOH)в р-ре=300*0,2=60г;
n(NaOH)=60:40=1,5моль;
n(H2SO4)=0,75моль;m(H2SO4)=0,75*98=73,5г;
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H2SO4+2NaOH=Na2SO4+2H2O
m(NaOH)р-ра=250*1,2=300г;
m(NaOH)в р-ре=300*0,2=60г;
n(NaOH)=60:40=1,5моль;
n(H2SO4)=0,75моль;
m(H2SO4)=0,75*98=73,5г;