16. Ca → Ca(OH)₂ → CaCO₃ → CaO → CaCl₂ → Ca(NO₃)₂

\(Ca+2H_2O\rightarrow Ca(OH)_2+H_2\uparrow\)

\(Ca(OH)_2+CO_2\rightarrow CaCO_3\downarrow+H_2O\)

\(CaCO_3\xrightarrow{t}CaO+CO_2\uparrow\)

\(CaO+2HCl\rightarrow CaCl_2+H_2O\)

\(CaCl_2+2AgNO_3\rightarrow Ca(NO_3)_2+2AgCl\downarrow\)

Ответ: Ca → Ca(OH)₂ → CaCO₃ → CaO → CaCl₂ → Ca(NO₃)₂.