дано
m( изв CaCO3) = 25 g
W(пр.) = 20%
m(CO2) = 4 g
η(CO2)-?
m чист.(CaCO3) = 25 - (25*20% / 100%) = 20 g
CaCO3+2HCL-->CaCL2+H2O+CO2
M(CaCO3) =100 g/mol
n(CaCO3) = m/M = 20 / 100 = 0.2 mol
n(CaCO3) = n(CO2) = 0.2 mol
M(CO2) = 44 g/mol
m теор (CO2) = n*M = 0.2 * 44 = 8.8 g
η (CO2) = m пр. (CO2) / m теор.(CO2) * 100% = 4 / 8.8 *100% = 45.45%
ответ 45.45%
дано
m( изв CaCO3) = 25 g
W(пр.) = 20%
m(CO2) = 4 g
η(CO2)-?
m чист.(CaCO3) = 25 - (25*20% / 100%) = 20 g
CaCO3+2HCL-->CaCL2+H2O+CO2
M(CaCO3) =100 g/mol
n(CaCO3) = m/M = 20 / 100 = 0.2 mol
n(CaCO3) = n(CO2) = 0.2 mol
M(CO2) = 44 g/mol
m теор (CO2) = n*M = 0.2 * 44 = 8.8 g
η (CO2) = m пр. (CO2) / m теор.(CO2) * 100% = 4 / 8.8 *100% = 45.45%
ответ 45.45%