Chimie, întrebare adresată de simona931, 8 ani în urmă

Am mare nevoie de ex nr II. Mulțumesc! ​

Anexe:

Răspunsuri la întrebare

Răspuns de MihaiN16
9

Răspuns:

\rm1.\:\:\:\underline{Cu^0}+H^{+1}\underline{\underline{N^{+5}}}O_3^{-2}\rightarrow\underline{Cu^{+2}}(N^{+5}O_3^{-2})_2+\underline{\underline{N^{+4}}}O_2^{-2}+H_2^{+1}O^{-2}

\rm Cu^0\xrightarrow{-2e^-}Cu^{+2}|\times1

\rm N^{+5}\xrightarrow{+1e^-}N^{+4}|\times2

Cu + 4HNO Cu(NO) + 2NO + 2H₂O

\rm2.\:\:\:\underline{Ni^{+2}}O^{-2}+\underline{\underline{H_2^0}}\rightarrow\underline{Ni^0}+\underline{\underline{H_2^{+1}}}O^{-2}

\rm Ni^{+2}\xrightarrow{+2e^-}Ni^0|\times2\!\!\!/\:\:1

\rm H_2^0\xrightarrow{-2e^-}2H^{+1}|\times2\!\!\!/\:\:1

NiO + H Ni + H₂O

\rm3.\:\:\:\underline{Cl_2^{0}}+H_2^{+1}O^{-2}\rightarrow H^{+1}\underline{Cl^{+1}}O^{-2}+H^{+1}\underline{Cl^{-1}}

\rm Cl_2^0\xrightarrow{-2e^-}2Cl^{+1}|\times2\!\!\!/\:\:1

\rm Cl_2^0\xrightarrow{+2e^-}2Cl^{-1}|\times2\!\!\!/\:\:1

Cl + H₂O HClO + HCl

\rm4.\:\:\:\underline{C^0}+H^{+1}\underline{\underline{N^{+5}}}O_3^{-2}\rightarrow\underline{C^{+4}}O_2^{-2}+\underline{\underline{N^{+2}}}O^{-2}+H_2^{+1}O^{-2}

\rm C^0\xrightarrow{-4e^-}C^{+4}|\times3

\rm N^{+5}\xrightarrow{+3e^-}N^{+2}|\times4

3C + 4HNO 3CO + 4NO + 2H₂O

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