Comments on: Determination of the Empirical Formula of Copper Sulfide http://timjoh.com/determination-of-the-empirical-formula-of-copper-sulfide/ Code, games, chess and everything but the kitchen sink Fri, 21 Nov 2008 14:53:51 +0000 http://wordpress.org/?v=2.5.1 By: Tim http://timjoh.com/determination-of-the-empirical-formula-of-copper-sulfide/#comment-1776 Tim Mon, 06 Nov 2006 00:29:19 +0000 http://timjoh.com/determination-of-the-empirical-formula-of-copper-sulfide/#comment-1776 Jim: Since I just started studying I'm not entirely sure, but I believe that you are wrong. 0.0077 mol copper and 0.0041 mol sulfur does not mean that we have half the amount of sulfur and therefore need twice as much -- it means that we have half the amount of sulfur, and can't do anything about it. This means that the formula is written as Cu2S, which symbolizes that there is twice as much copper as there is sulphur. If you are referring to the error margin, please note that these values are approximate: the experiments were certainly not carried out under accurate circumstances. However, 0.0077 is closer to twice 0.0041 than it is to only 0.004, half it or three times it. Jim: Since I just started studying I’m not entirely sure, but I believe that you are wrong. 0.0077 mol copper and 0.0041 mol sulfur does not mean that we have half the amount of sulfur and therefore need twice as much — it means that we have half the amount of sulfur, and can’t do anything about it. This means that the formula is written as Cu2S, which symbolizes that there is twice as much copper as there is sulphur.

If you are referring to the error margin, please note that these values are approximate: the experiments were certainly not carried out under accurate circumstances. However, 0.0077 is closer to twice 0.0041 than it is to only 0.004, half it or three times it.

]]> By: jim prochaska http://timjoh.com/determination-of-the-empirical-formula-of-copper-sulfide/#comment-1774 jim prochaska Sun, 05 Nov 2006 23:21:31 +0000 http://timjoh.com/determination-of-the-empirical-formula-of-copper-sulfide/#comment-1774 For .0077 mole of copper .o41 mole of sulfur is not a 2:1 ratio. Your site needs to be corrected. thank you Jim Prochaska For .0077 mole of copper .o41 mole of sulfur is not a 2:1 ratio.
Your site needs to be corrected.

thank you

Jim Prochaska

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