дано
mпр (Al2O3) = 150 g
η(Al2O3) = 70%
m(AlOH)3) - ?
m теор (Al2O3) = 150 * 100% / 70 % = 214 .3 g
2Al(OH)3-->Al2O3+3H2O
M(Al2O3) = 102 g/mol
n(Al2O3) = m(Al2O3) / M(Al2O3) = 214.3 / 102 = 2.1 mol
2n(Al(OH)3) = n(Al2O3)
n(Al(OH)3 = 2*2.1 / 1 = 4.2 mol
M(Al(OH)3) = 78 g/mol
m(Al(OH)3) = n*M = 78 * 3 = 234 g
ответ 234 гр
Объяснение:
дано
mпр (Al2O3) = 150 g
η(Al2O3) = 70%
m(AlOH)3) - ?
m теор (Al2O3) = 150 * 100% / 70 % = 214 .3 g
2Al(OH)3-->Al2O3+3H2O
M(Al2O3) = 102 g/mol
n(Al2O3) = m(Al2O3) / M(Al2O3) = 214.3 / 102 = 2.1 mol
2n(Al(OH)3) = n(Al2O3)
n(Al(OH)3 = 2*2.1 / 1 = 4.2 mol
M(Al(OH)3) = 78 g/mol
m(Al(OH)3) = n*M = 78 * 3 = 234 g
ответ 234 гр
Объяснение: