<span>S+O2 =SO2 оксид серы (4)</span>
<span><span>2SO2 + O2 =2SO3 Оксид серы (6) </span></span>
темпер 400-500, катализатор оксид ванадия (5)
<span><span><span>SO3 + H2O = H2SO4 (серная кислота)</span></span></span>
<span><span><span><span>H2SO4 + 2Co(OH)2 = (CoOH)2SO4 + 2H2O гидроксосульфат кобальта</span></span></span></span>
<span><span><span><span>избыток гидроксида кобальта</span></span></span></span>
<span><span><span><span><span>(CoOH)2SO4 + H2SO4 =CoSO4 + 2H2O сульфат кобальта</span></span></span></span></span>
<span><span><span><span><span><span>SO3 + Ca(OH)2 = CaSO4 + H2O </span></span></span></span></span></span>
<span><span><span><span><span><span>CaSO4 + Na2CO3 = CaCO3 + Na2SO4</span></span></span></span></span></span>
<span><span><span><span><span><span><span>CaCO3 = CaO + CO2</span></span></span></span></span></span></span>
<span><span><span><span><span><span><span>температура 1000</span></span></span></span></span></span></span>
<span><span><span><span><span><span><span><span>CaO + H2O = Ca(OH)2</span></span></span></span></span></span></span></span>
<span>3Ca(OH)2 + 2H3PO4 = Ca3(PO4)2 + 6H2O</span>