дано
m(ppa HBr) = 16.2 g
W(HBr) = 20%
+NaOH
w(NaBr) = 8%
m(ppa NaBr)-?
m(HBr) = 16.2 * 20% / 100% = 3.24 g
HBr+NaOH-->NaBr+H2O
M(HBr)= 81 g/mol
n(HBr) = m/M = 3.24 / 81 = 0.04 mol
n(HBr) = n(NaBr) =0.04 mol
M(NaBr) = 103 g/mol
m(NaBr) = n*M =0.04 *103 = 4.12 g
m(ppa NaBr) = m(NaBr) * 100% / W(NaBr) = 4.12 * 100% / 8% = 5.15 g
ответ 5.15 г
Объяснение:
дано
m(ppa HBr) = 16.2 g
W(HBr) = 20%
+NaOH
w(NaBr) = 8%
m(ppa NaBr)-?
m(HBr) = 16.2 * 20% / 100% = 3.24 g
HBr+NaOH-->NaBr+H2O
M(HBr)= 81 g/mol
n(HBr) = m/M = 3.24 / 81 = 0.04 mol
n(HBr) = n(NaBr) =0.04 mol
M(NaBr) = 103 g/mol
m(NaBr) = n*M =0.04 *103 = 4.12 g
m(ppa NaBr) = m(NaBr) * 100% / W(NaBr) = 4.12 * 100% / 8% = 5.15 g
ответ 5.15 г
Объяснение: