How can I prepare *colloidal silica* from sodium silicate(water glass)?
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Sodium silicate was used as the silica source. The colloidal silica prepared via sol-gel method at the base condition. Sodium ion of sodium silicate was removed by ion-exchanging to obtain the active silicic acid which was titrated with potassium hydroxide (KOH) solution to form the colloidal silica.
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