Phosphate rock is one of the four most important basic chemical commodities.
磷酸盐类的岩石是四种最重要的基本化学商品之一。
2
In this paper, based on the preparation of monosodium phosphate, we analyse and sum up the basic teaching mode of designable experimentation in the chemistry.
以磷酸二氢钠的制备为例，阐述了化学实验教学中开展设计性实验的基本模式和教学策略。
3
Phosphate rock (mainly calcium phosphate) is one of the four most important basic chemical commodities.