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не знаю что писать но спс за Hit the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you are notified that any dissemination distribution or copying of this email and any attachments is intended only for the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you are not the intended recipient you.
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0,35 моль
x моль 81,55г
BaCl2+ H2SO4 = BaSO4 + 2HCl (1)
1моль 1моль
n(BaSO4) = 81,55г / 233г/моль = 0,35моль
n(H2SO4)= 0,35моль согласно уравнения (1)
m(H2SO4) = 0,35моль х 98г/моль = 34,3г
NaOH+ HNO3= NaNO3+ H2O (2)
n(NaOH)= 140,8 мл х 1,25г/мл х 0,25 / 40г/моль = 1,1 моль
n(HNO3)= 1,1 моль согласно уравнения(2)
m(HNO3)= 1,1 моль х 63г/моль = 69,3г
w(HNO3)=69,3г/500г раствора = 0,14 или 14%
w(H2SO4)= 34,3г/500г = 0,068 или 6,8%
M(BaSO4)=233 г/моль
M(H2SO4) =98г/моль
M(NaOH)=40г/моль
M(HNO3) = 63г/моль