Ответ:
дано
m(ppa NaOH) = 100 g
W(NaOH) = 40%
m(CuSO4) = 100 g
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m(Cu(OH)2)-?
m(NaOH) = 100 * 40% / 100% = 40 g
M(NaOH) = 40 g/mol
n(NaOH) = m/M = 40 / 40 = 1 mol
M(CuSO4) = 160 g/mol
n(CuSO4) = m/M = 100 / 160 = 0.625 mol
n(NaOH) > n(CuSO4)
2NaOH+CuSO4-->Cu(OH)2+Na2SO4
M(Cu(OH)2) = 98 g/mol
m(Cu(OH)2) = n*M = 0.625 * 98 = 61.25 g
ответ 61.25 г
Объяснение: