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    Chemwiz2016's Avatar
    Chemwiz2016 Posts: 1, Reputation: 1
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    #1

    Nov 11, 2016, 09:43 AM
    Concentrations of Mg and Ca in seawater
    After doing a titration my concentration of Magnesium ions is slightly higher than the literature value. Why could this be?
    Also my concentration of Calcium ions is slightly less than the literature value so also why could this be too?
    Curlyben's Avatar
    Curlyben Posts: 18,514, Reputation: 1860
    BossMan
    		  
    #2

    Nov 11, 2016, 10:35 AM
    Margin of Experimental error
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #3

    Nov 11, 2016, 01:47 PM
    See above and note that sea water varies depending on the season and location. Sea of Galilee is vastly different then the Arctic Ocean. What did you do during titration and how did you determine the Mg and Ca levels? Did you use the EDTA method? Maybe you are color inhibited since that is how the ions are determined.
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