October 2021 1 16 Report

1. Al-AlCl3-Al(OH)3-Al2O3-NaAlO2

2. Fe-FeSO4-Fe(OH)2-FeCl2-AgCl

3.Ca-Ca(OH)2-Ca(NO3)2-CaCO3-CO2

4.S-SO2-H2SO3-K2SO3-KCl

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