<span>3NaOH</span><span> + </span><span>Fe(NO3)3</span><span> = </span>3NaNO3<span> + </span>Fe<span>(OH)</span>3↓
3Na+<span> + </span>3OH−<span> + </span>Fe3+<span> + </span>3NO3−<span> = </span>3Na+<span> + </span>Fe<span>(OH)</span>3<span>+ </span>3NO3<span>−
</span>3OH−<span> + </span>Fe3+<span> = </span>Fe<span>(OH)</span>3<span>+</span>
NaOH+HCl->NaCl+H2O
m(HCl)=4 г
n(HCl)=4/36,5=0,1 моль
n(HCl)=n(NaCl)
m(NaCl)=0,1*58,5=5,85 грамм
С2H4 ----------> C2H2 --------> CH3COH -------> CH3COOH -------> CH3-COOCH3.
CH3COH + 2Cu(OH)2 = CH3COOH + Cu2O + 2H2O