Mixing phenomenon of iron hydroxide colloid and aluminum hydroxide colloid

It is known that Fe(OH)3 colloid is positively charged, Al(OH)3 colloid is positively charged and H2SiO3 colloid is negatively charged, so the following experimental phenomena are as follows:

Mixing phenomenon of Fe(OH)3 colloid and Al(OH)3 colloid: ionization

Colloidal mixing phenomenon of ferric hydroxide colloid H2SiO3: polymerization

Iron salt mainly purifies water through the hydrolysis of iron ions, while the nature of Fe(OH)3 colloid is that the colloid is not charged, but the colloidal particles are charged, and the water is purified by adsorbing the charged particles.

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