1)
Các phản ứng xảy ra:
\(Cu{(OH)_2}\xrightarrow{{{t^o}}}CuO + {H_2}O\)
\(CuO + {H_2}\xrightarrow{{{t^o}}}Cu + {H_2}O\)
\(2Cu + {O_2}\xrightarrow{{{t^o}}}2CuO\)
2)
Các phản ứng xảy ra:
\(S + {O_2}\xrightarrow{{{t^o}}}S{O_2}\)
\(4P + 5{O_2}\xrightarrow{{{t^o}}}2{P_2}{O_5}\)
3)
Phản ứng xảy ra:
\(Ca{(OH)_2} + C{O_2}\xrightarrow{{}}CaC{O_3} + {H_2}O\)
Ta có:
\({n_{C{O_2}}} = \frac{{88}}{{44}} = 2{\text{ mol = }}{{\text{n}}_{CaC{O_3}}} = {n_{Ca{{(OH)}_2}}}\)
\( \to m = {m_{CaC{O_3}}} = 2.100 = 200{\text{ gam}}\)
\({C_{M{\text{ Ca(OH}}{{\text{)}}_2}}} = \frac{2}{{0,3}} = 6,67M\)
