Question

viết phương trình hoàn thành dãy chuyển đổi sau

Na-> Na2O -> NaOH

KMnO4-> O2-> Fe2O4-> H2O-> H2->Cu

Answer 1

a.\(4Na+O_2\rightarrow\left(t^o\right)2Na_2O\)

\(Na_2O+H_2O\rightarrow2NaOH\)

b.\(2KMnO_4\rightarrow\left(t^o\right)K_2MnO_4+MnO_2+O_2\)

\(3Fe+2O_2\rightarrow\left(t^o\right)Fe_3O_4\)

\(Fe_3O_4+4H_2\rightarrow\left(t^o\right)3Fe+4H_2O\)

\(2H_2O\rightarrow\left(đp\right)2H_2+O_2\)

\(CuO+H_2\rightarrow\left(t^o\right)Cu+H_2O\)

Answer 2

a.$4Na+{}^{}\to \left({}^{}\right)2N{}^{}O$

$N{}^{}O+{}^{}O\to 2NaOH$

b.$2KMn{}^{}\to \left({}^{}\right){}^{}Mn{}^{}+Mn{}^{}+{}^{}$

$3Fe+2{}^{}\to \left({}^{}\right)F{}^{}{}^{}$

$F{}^{}{}^{}+4{}^{}\to \left({}^{}\right)3Fe+4{}^{}$