There is definitely evidence that it is " present " in the body, but it's not known if it is required . ( See the footnotes for Silicon # Biological role, and Silicic acid # Silicic acid in health . ) talk ) 12 : 21, 18 June 2014 ( UTC)
42.
There is definitely evidence that it is " present " in the body, but it's not known if it is required . ( See the footnotes for Silicon # Biological role, and Silicic acid # Silicic acid in health . ) talk ) 12 : 21, 18 June 2014 ( UTC)
43.
It is an extremely strong base and does not persist in solution, tending to be consumed by water to form extremely weak silicic acid ( H 4 SiO 4; p " K " a2 = 13.2 at 25 �C ), a very difficult-to-control reaction that typically leaves only minuscule amounts of the ion and large amounts of hydrated silica condensate.
