4.
(1) ${\left( {{C_6}{H_{10}}{O_5}} \right)_n} + n{H_2}O\xrightarrow{{{H^ + }}}n{C_6}{H_{12}}{O_6}$
(2) ${C_6}{H_{12}}{O_6}\xrightarrow[{}]{{men}}2{C_2}{H_5}OH + 2C{O_2}$
(3) ${C_2}{H_5}OH + CuO\xrightarrow{{{t^o}}}C{H_3}CHO + Cu + {H_2}O$
(4) $C{H_3}CHO + 2AgN{O_3} + 3N{H_3} + {H_2}O \to C{H_3}COON{H_4} + 2Ag + 2N{H_4}N{O_3}$
5.
$Ca{C_2} + 2{H_2}O \to Ca{(OH)_2} + {C_2}{H_2}$
${C_2}{H_2} + {H_2}\xrightarrow[{{t^o}}]{{Pd/PbC{O_3}}}C{H_2} = C{H_2}$
${C_2}{H_2} + {H_2}O\xrightarrow{{{H^ + }}}C{H_3}CHO$
$C{H_3}CHO + {H_2}\xrightarrow[{{t^o}}]{{Ni}}{C_2}{H_5}OH$
${C_2}{H_5}OH + CuO\xrightarrow{{{t^o}}}C{H_3}CHO + Cu + {H_2}O$
${C_2}{H_5}OH + {O_2}\xrightarrow[{}]{{mengiam}}C{H_3}COOH + {H_2}O$
$C{H_2} = C{H_2} + {H_2}O\xrightarrow{{{H^ + }}}C{H_3}C{H_2}OH$
${C_2}{H_5}OH\xrightarrow[{{{170}^o}C}]{{{H_2}S{O_4}}}{C_2}{H_4} + {H_2}O$
$C{H_3}COOH + {C_2}{H_5}OH\underset{{{t^o}}}{\overset{{{H_2}S{O_4}d}}{\longleftrightarrow}}C{H_3}COO{C_2}{H_5} + {H_2}O$
$C{H_3}COOH + {C_2}{H_4}\underset{{{t^o}}}{\overset{{{H_2}S{O_4}d}}{\longleftrightarrow}}C{H_3}COO{C_2}{H_5}$
6.
(1) $A{l_4}{C_3} + 12{H_2}O \to 4Al{(OH)_3} + 3C{H_4}$
(2) $2C{H_4}\xrightarrow[{lamlanhnhanh}]{{{{1500}^o}C}}{C_2}{H_2} + 3{H_2}$
(3) ${C_2}{H_2} + {H_2}\xrightarrow[{{t^o}}]{{Pd/PbC{O_3}}}C{H_2} = C{H_2}$
(4) $C{H_2} = C{H_2} + {H_2}O\xrightarrow{{{H^ + }}}C{H_3}C{H_2}OH$
(5) ${C_2}{H_5}OH + {O_2}\xrightarrow[{}]{{mengiam}}C{H_3}COOH + {H_2}O$
