Compose ionic and molecular equations for interaction reactions in aqueous solutions of the following compounds: a) CaCO3 HCl; b) FeCl3 K4[Fe(CN)6]; c) Pb(OH)2 NaOH; d) CuSO4 NH3 (excess); e) As2S3 (NH4)2S. Specify: a) reversible and irreversible reactions; b) why are they used in the analysis of inorganic substances?

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