дано
m(ppa Na2O) = 300 g
w(прим ) = 20%
m(ppa HNO3) = 250 g
W(HNO3) = 40%
η(NaNO3) =90%
m пр(NaNO3)-?
m(Na2O) = 300 - (300*20%/ 100%) = 240 g
M(Na2O) = 62 g/mol
n(Na2O) = m/M = 240 / 62 = 3.87 mol
m(HNO3) = 250*40% / 100% = 25 g
M(HNO3) = 63 g/mol
n(HNO3) =25 / 63 = 0.4 mol
n(Na2O) > n(HNO3)
Na2O+2HNO3-->2NaNO3+H2O
2n(HNO3) = 2n(NaNO3) = 0.4 mol
M(NaNO3) = 85 g/mol
m теор (NaNO3) = 0.4* 85 = 34 g
m пр (NaNO3) = 34 * 90% / 100% = 30.6 g
ответ 30.6 г
Объяснение:
дано
m(ppa Na2O) = 300 g
w(прим ) = 20%
m(ppa HNO3) = 250 g
W(HNO3) = 40%
η(NaNO3) =90%
m пр(NaNO3)-?
m(Na2O) = 300 - (300*20%/ 100%) = 240 g
M(Na2O) = 62 g/mol
n(Na2O) = m/M = 240 / 62 = 3.87 mol
m(HNO3) = 250*40% / 100% = 25 g
M(HNO3) = 63 g/mol
n(HNO3) =25 / 63 = 0.4 mol
n(Na2O) > n(HNO3)
Na2O+2HNO3-->2NaNO3+H2O
2n(HNO3) = 2n(NaNO3) = 0.4 mol
M(NaNO3) = 85 g/mol
m теор (NaNO3) = 0.4* 85 = 34 g
m пр (NaNO3) = 34 * 90% / 100% = 30.6 g
ответ 30.6 г
Объяснение: