дано
m(ppa CuCL2) = 135 g
W(CuCL2) = 8%
m(AL)-?
m(CuCL2) = m(ppa CuCL2) * W(CuCL2) / 100% = 135*8% / 100%= 10.8 g
2Al+3CuCL2 = 2AlCL3+3Cu
M(CuCL2) = 135 g/mol
n(CuCL2) = m/M = 10.8 / 135 = 0.08 mol
2n(AL) = 3n(CuCL2)
n(AL)= 3* 0.08 / 2 = 0.12 mol
M(Al) = 27 g/mol
m(Al) = n(Al)*M(AL) = 3.24 g
ответ 3.24 г
дано
m(ppa CuCL2) = 135 g
W(CuCL2) = 8%
m(AL)-?
m(CuCL2) = m(ppa CuCL2) * W(CuCL2) / 100% = 135*8% / 100%= 10.8 g
2Al+3CuCL2 = 2AlCL3+3Cu
M(CuCL2) = 135 g/mol
n(CuCL2) = m/M = 10.8 / 135 = 0.08 mol
2n(AL) = 3n(CuCL2)
n(AL)= 3* 0.08 / 2 = 0.12 mol
M(Al) = 27 g/mol
m(Al) = n(Al)*M(AL) = 3.24 g
ответ 3.24 г