1. $2_{}$$H_{2}$$S_{}$ + $O_{2}$ `->`$2_{}$$H_{2}$$O_{}$ + $2_{}$ $S_{}$
2. $S_{}$ + $O_{2}$ `->` $S_{}$$O_{2}$
3. $Cu_{}$ + $2_{}$$H_{2}$$S_{}$$O_{4 đ}$ `->` $Cu_{}$$S_{}$$O_{4}$ + $S_{}$$O_{2}$ + $2_{}$$H_{2}$$O_{}$
4. $2_{}$$Al_{}$ + $3_{}$$H_{2}$$S_{}$$O_{4}$ $_{loãng}$ `->` $Al_{2}$$(_{}$$S_{}$$O_{4}$$)_{}$$_{3}$ + $3_{}$$H_{2}$