silicic acidsilicic acid
- any of several jellylike masses, SiOnHO, precipitated by acidifying sodium silicate solution
- any of several hypothetical acids of which the different mineral silicates may be regarded as salts
Hydrated silica, SiO2·nH2O, produced by acidification of sodium silicate solution. Depending on the proportion of water, it may have any consistency from jelly to amorphous solid.