Question

Answer 1

a) 2Na + 2H₂O → 2NaOH + H₂

b) 4Na + O₂ → 2Na₂O

c) P₂O₅ + 3H₂O → 2H₃PO₄

d) 2HgO → 2Hg + O₂

e) CaCl₂ + Na₂CO₃ → CaCO₃ + 2NaCl

f) CuCl₂ + 2NaOH → Cu(OH)₂ + 2NaCl

Answer 2

\(a,2Na+2H_2O\rightarrow2NaOH+H_2\)

\(b,4Na+O_2\rightarrow2Na_2O\)

\(c,P_2O_5+3H_2O\rightarrow2H_3PO_4\)

\(d,2HgO\rightarrow2Hg+O_2\)

\(e,CaCl_2+Na_2CO_3\rightarrow CaCO_3+2NaCl\)

 

Answer 3

\(2Na+2H_2O\rightarrow2NaOH+H_2\\ 4Na+O_2\rightarrow2Na_2O\\ P_2O_5+3H_2O\rightarrow2H_3PO_4\\ 2HgO\rightarrow2Hg+O_2\\ Na_2CO_3+CaCl_2\rightarrow CaCO_3+2NaCl\\ CuCl_2+2NaOH\rightarrow Cu\left(OH\right)_2+2NaCl\)