AlCl3 + 3NaOH = Al(OH3) + 3NaCl
Al(+3) + 3Cl(-) + 3Na(+) +3OH(-) = Al(OH)3 + 3Na(+) +3Cl (-)
Al(3+) +3OH(-) = Al(OH)3
CH2-CH-CH-CH2-CH2-CH3
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CH3 Cl CH3
<span>Р→ Р2О5→ Н3РО4 →Са3(РО4)2</span>
Ρ(H2O)=mH2O=1g
100g xg
MgO+H2O=Mg(OH)2
18g 58g
x=100·58/18=322.2g
2Na+2C2H5OH=2C2H5ONa+H2
2C6H5OH + 2Na = 2C6H5ONa + H2
<span>2C2H5OH<span>+</span>Br2=2<span>C2H5OBr+H2</span></span>
c6h5oh<span> + 3br2 = c6h2br3oh + 3hbr</span>
<span>n(C6H2Br3OH)=9.93/331=0.03моль</span>
<span>n(C6H5OH)=n(c6h2br3oh)=0.03моль</span>
<span>n(H2 фенол)=0.0581/2=0.015моль</span>
<span>n(H2 общее)=0.896/22.4=0.04моль</span>
n(H2 этанол)=0.04-0.015=0.025моль
2n(H2 этанол)=n(C2H5OH)=2*0.025=0.05моль
m(C2H5OH)=0.05*46=2.3г
m(C6H5OH)=0.03*94=2.82г
m(смеси)=2.3+2.82=5.12г
w(C2H5OH)=2.3/5.12*100%=44.92%