国产在线一区二区视频_欧美中日韩免费观看网站}_日b视频在线观看_在线可以免费观看的a√片_亚洲综合另类小说色_在线观看播放另类国产小视频_久久精品国产精品九九_中文字幕在线观视频2020_日本东京热加勒比有码视频一区_免费毛儿一区二区十八岁

IGeneralState

Molecular formula Na2CO3 molecular weight 105.99. Also known as soda ash. Light anhydrous sodium carbonate is a white flowing powder with astringent taste. It is easily soluble in water and can form a variety of hydrates with water. It neutralizes with acid and is easy to decompose at high temperature. If exposed to the air for a long time, it will absorb water and carbon dioxide in the air, form sodium bicarbonate and form hard blocks.

IITechnical indicators(GB210.1-2004)

Indicator name indicator

Sodium carbonate content (dry basis)% ≥ 98.8

Sodium chloride content% ≤ 0.9

Iron content% ≤ 0.006

Water insoluble matter content% ≤ 0.10

IIIuseWay

碳酸鈉是重要的基本化工原料之一。在玻璃工業(yè)上大量使use，廣泛應(yīng)use于化學(xué)工業(yè)、其它工業(yè)和人民日常生活中。

4、 And brand:

Packing: 50kg woven bag lined with plastic film.

Brand: double ring brand.

Shelf life: more than 12 months.

attach: crystal water and solubility of sodium carbonate

Anhydrous sodium carbonate (soda ash) is anhydrous. The pure product is white powder (light) or granular material (heavy). The dried sodium carbonate has semi fluidity. Exposure to the air will absorb water and carbon dioxide in the air, generate sodium bicarbonate and form hard blocks.

Anhydrous sodium carbonate is very easy to dissolve in water, but it is often insoluble when the dissolution method is incorrect.

Sodium carbonate has three crystal forms: monohydrate (Na2CO3 ? H2O), HEPTAHYDRATE (Na2CO3 ? 7H2O) and decahydrate (Na2CO3 ? 10h2o). During the dissolution process, it is necessary to keep stirring to prevent sodium carbonate from sinking and gathering, otherwise it will form a complex of multiple crystals (in Lake stone shape) when sinking in water. The crystallization of the outer layer prevents the contact between water and anhydrous sodium carbonate inside, resulting in difficulty in dissolution.