Ba+O2=BaO
BaO+H2O=Ba (OH)2
Ba (OH)2+HCl=BaCl+H2O
<span><span>4 <span>Fe</span></span>+<span>6<span>H2O</span></span>+<span>3<span>O2</span></span> → <span>4<span>Fe<span>(OH)</span><span>3</span></span></span></span><span><span>
Fe2<span>(SO4)</span>3</span>+<span>6<span>NaOH</span></span> → <span>2<span>Fe<span>(OH)</span>3</span></span>+<span>3<span>Na2SO<span>4
</span></span></span></span>
А) Cu(OH)2-слабое основание
б)Fe(OH)3-слабое основание
в)H2CO3-слабая кислота
г)Zn(OH)2-слабое основание