Question

Câu 1: Hoàn thành chuỗi phản úng sau:

Na→Na20→NaOH→Na2SO4

     ↓                ↑

        NaCl   

 

Answer 1

$4Na + O_2 \xrightarrow{t^o} 2Na_2O$
$2Na + Cl_2 \xrightarrow{t^o} 2NaCl$
$Na_2O + H_2O \to 2NaOH$
$2NaCl + 2H_2O \xrightarrow{dpdd,cmn} 2NaOH + Cl_2 + H_2$
$2NaOH + H_2SO_4 \to Na_2SO_4 + 2H_2O$

Answer 2

\(4Na+O_2\rightarrow2Na_2O\\ Na_2O+H_2O\rightarrow2NaOH\\ 2NaOH+H_2SO_4\rightarrow Na_2SO_4+2H_2O\\ Na+HCl\rightarrow NaCl+\dfrac{1}{2}H_2\\2 NaCl+2H_2O-^{đpddcmn}\rightarrow2NaOH+Cl_2+H_2\)