1) AlCl3 + 3NaOH = Al(OH)3 + 3NaCl
2) Al(OH)3 + 3HCl = AlCl3 + 3H2O
Al(OH)3 + 3H+ +3Cl- = Al3+ + 3Cl- + H2O
Al(OH)3 + 3H = Al3+ + H2O
3) Al(OH)3 + NaOH = Na[Al(OH)4]
CuO
w(Cu)=63*1/(63+16)=0,797
w(Cu)=79,7 %
Cu2O
w(Cu)= 2*63/(63*2+16)=0,887
w(Cu)=88,7 %
<span><span><span>3C2H</span><span><span>2 </span><span><span><span><span /><span /></span></span></span><span> </span></span><span>C6H6</span></span></span>
<span><span>X--------------62,4г</span></span>
<span /><span><span>3х26---------78</span></span>
<span><span>Х<span>=62,4</span>г</span></span>
<span /><span><span><span>62,4г----------100</span>%</span></span>
<span /><span><span><span>х-----------------80% х</span><span>=49.92</span>г</span>
</span>