The chemical equation Si + 2H2O -> Si(OH)4. Detailed information about the equation Si + 2H2O -> Si(OH)4: In this chemical equation, the compound Silicon Si reacts with water H2O to form Silicic Acid Si(OH)4. Reaction conditions: This reaction requires high temperatures and high pressure to occur. Reaction process: Silicon (Si) reacts with water (H2O) under high temperature and pressure conditions, then the compound Silicon Hydroxide (Si(OH)4) is formed. Observed Phenomenon: During the reaction process, changes in color, temperature, and pressure can be observed.