How to understand the total alkalinity of soda ash (expressed as the mass fraction of Na2CO3 on a dry/wet basis)?
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I don’t quite understand this question. What does the total alkalinity (expressed as the mass percentage of Na2CO3 on a dry basis) mean? What is wet basis recording again?
That’s because the soda ash we produce always contains a certain amount of impurities, no matter under what conditions; therefore, the mass fraction of Na2CO3 is referred to as the total alkalinity. It is only Na2CO3 that serves as the \"alkali\" used in practical applications. The wet basis refers to the presence of a certain amount of moisture (the finished products leaving our factory also contain some moisture, though in small quantities). The moisture, along with other impurities and Na2CO3, is taken into account, and the content of Na2CO3 is what is referred to as the wet basis. The dry basis refers to the mass fraction of Na2CO3 among Na2CO3 and other impurities, after removing the water content; this is the dry basis content. It is clear that for the same amount of Na2CO3, the value on a dry basis is higher than that on a wet basis.