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.