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Homework Help: Chemistry lab formulas?

  1. Sep 27, 2006 #1
    We lit a piece of Mg so the formula is:
    2Mg(s) + O2(g) HEAT-- 2MgO(s)

    We then dissolved this in water so it would then be:
    MgO(s) + H2O(l) -- Mg(OH)2(l)

    Next we blew into water which is:
    CO2(g) + H2O(l) -- H2CO3(l)

    Is this all correct? Should I have (Aq) after the H2CO3?
     
    Last edited: Sep 27, 2006
  2. jcsd
  3. Sep 27, 2006 #2

    mrjeffy321

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    Science Advisor

    I agree. This reaction is quite exothermic itself after the Mg is ignited, a lot of heat it given off on the products side.
    If the Mg(OH)2 is dissolved in the water it should be in the aqueous (aq) state, not liquid.However, I dont think MgO is very soluble in water. http://www.jtbaker.com/msds/englishhtml/M0182.htm" [Broken]
    Just like the previous reaction, if the H2CO3 is in solution it should be in the aqueous (aq) state, not liquid.
     
    Last edited by a moderator: May 2, 2017
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