What is the molality of a solution containing 19.5g HCl and 257g of H2O?

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What is the molality of a solution containing 19.5g HCl and 257g of H2O?

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Bình An 4 years 2021-08-03T20:36:21+00:00 1 Answers 15 views 0

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  1. Orla
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    2021-08-03T20:37:44+00:00
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    m= 2.06

    molality is m = moles/kg

    if you look at the periodic table the mass of HCl is 36.458 rounded to 36.5

    divide the 19.5g by the mass (36.5) and you’ll get 0.53

    next, you convert g to kg so you divide by 1,000. 257/1,000 = 0.257

    you plug those two answers into the equation > m= 0.53 mol HCl/ 0.257kg H20

    the answer will be 2.06 when you divide and there’s how you get the molality.

    remember, HCl is the solute and H20 is the solvent.

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