<span>2Fe+3Cl2-2FeCl3 - сполучення..<span>
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CuCl2 + 2KOH = 2KCl + Cu(OH)2↓
Cu + 2Cl + 2K + 2OH = 2K + 2OH + Cu(OH)2↓
Cu + 2OH = Cu(OH)2↓
Na2O----NaOH
Na2O+H2O=NaOH
Дано
m(S)=6.4 g
NaOH
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m(Na2SO3)-?
6.4 XL
S + O2-->SO2 M(S)=32 g/mol Vm=22.4L/mol
32 22.4
X(SO2)=6.4*22.4/32 = 4.48 л
4.48 Xg
SO2+2NaOH-->Na2SO3+H2O M(Na2SO3)=126 g/mol
22.4 126
X=4.48 * 126 / 22.4
X=25.2 g
ответ 25.2 г