Traditional Culture Encyclopedia - Traditional stories - Materials are the important material basis for human survival and development, and epoch-making materials can be used as milestones of human civilization. (1)Glass is the traditional silicate material
Materials are the important material basis for human survival and development, and epoch-making materials can be used as milestones of human civilization. (1)Glass is the traditional silicate material
| (1)Limestone Na 2 CO 3 ＋2SiO 2 Na 2 SiO 3 ＋CO 2 ↑ CaCO 3 ＋SiO 2 CuSiO 3 ＋CO 2 ↑ (2)SiCl 4 ＋4NH 3 Si(NH 2 ) 4 +4HCl 3Si(NH 2 ) 4 8NH 3 ↑ + Si 3 N 4< /p> (3)①BE ②AD |
| (2)Use the valence to first write the chemical formula of silicon nitride: Si 3 N 4 , and then based on the information given in the question, you can write the chemical equation. (3) ① by the structure of PBT can be seen is the polymerization reaction obtained polymer compounds, PBT monomer terephthalic acid and 1,3?propylene glycol, are not aromatic hydrocarbons; 1,3?propylene glycol can not be with NaOH, Na 2 CO 3 reaction. ② treatment of thermosetting plastics, deep burial will cause soil pollution, because it is not easy to dissolve in organic solvents, so the use of organic solvents to dissolve the recovery is also not desirable. |
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