Дано
W(H2SO4)=8%
p(H2SO4)=1.05 g/mL
m(ppa H2SO4)=200 g
W1(H2SO4)=2%
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V(H2SO4)-?
m(вва)=m(ppa H2SO4)*W(H2SO4)/100% = 200*2%/100%=4 g
m(ppa 8% H2SO4)= m(вва)*100% / W(H2SO4) = 4*100% / 8% = 50 g
V(ppa)= m(ppa) / p(H2SO4)=50 / 1.05=47.62 мл
ответ 47.62 мл