flagstone
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Calculationg molarity with diferent nH2O
flagstone replied to flagstone's topic in Inorganic Chemistry
Yeah, sorry - you are right. Yes, I realized it a bit later... Thank you. -
Calculationg molarity with diferent nH2O
flagstone replied to flagstone's topic in Inorganic Chemistry
I know what is the molar mass of Na2HPO4.12H2O... The problem is that I have to get a 66,6mM solution of Na2HPO4.2H2O with molar mass 175.965 so I have to take 11.72g of it. However, I have Na2HPO4.12H2O with molar mass 346.04 so I have to take 23.046 of it which make sense because 23.046>11.72 at the expense of the nH2O. But is it right or wrong this logic? -
Hello everybody! I have a bit silly question maybe... I have to make solution with Na2HPO4.2H2O equal to 66,6mM (So I have to take 11,85g of it). OK, but I have Na2HPO4.12H2O. How to calculate it to get a solution with the same concentration of Na2HPO4. My task is to make a Sorensen buffer with 66,6~,7mM KH2PO4 together with Na2HPO4.2H2O (66,6mM) = pH7. Thank you!