CH₃-CH₂-CH₂-COH+H₂=CH₃-CH₂-CH₂-CH₂<span>OH (БУТАНОЛ-1)
</span>CH₃-CH₂-CO-СH₂-CH₃+H₂=CH₃-CH₂-CH₂(OH)-СH₂-CH₃ <span>(БУТАНОЛ-3)</span>
2) Na2SO4 + 2KNO3=2NaNO3+K2SO4
Ni(OH)2 + 4NH4CNS = (NH4)2[Ni(CNS)4] + 2NH3 + 2H2O
<span>2HMnO4+5HNO2 -> 2Mn(NO3)2 + HNO3 + 3H2O </span>