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What is wt/wt ration -- it was on the aamc 7 exam

Discussion in 'MCAT Discussions' started by theDr., Apr 15, 2004.

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  1. theDr.

    theDr. Senior Member
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    I remember this from chemistry -- but it wasn't cover in EK...isn't there a wt/vol ratio also -- are these in the kaplan books - thanks
     
    #1 theDr., Apr 15, 2004
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  2. Cerberus

    Cerberus Heroic Necromancer
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    what does it sound like...
     
    #2 Cerberus, Apr 15, 2004
  3. blz

    blz Senior Member
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    wt-wt % just means that whatever solute you're dissolving is x% of the total weight of the solution. So for that problem, you assume 10grams of solution of which 10% (1 gram) is Pb(NO3)2. The rest (9grams) would be water. Then you just use the standard mole fraction eqn to find it using those values. I believe it works out to .006
     
    #3 blz, Apr 15, 2004
  4. Direct Laryngoscopy

    Direct Laryngoscopy Account on Hold
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    took me ten minutes to realized what they were saying :laugh:
     
    #4 Direct Laryngoscopy, Apr 15, 2004
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