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    Salting Sidewalks

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    Living in Michigan, we are accustomed to having snow and ice on our sidewalks. Besides "chipping" the ice away, we add something (usually a salt) to the sidewalks and the ice melts. In addition, if we use calcium chloride rather than sodium chloride, we find we have to use less calcium chloride than sodium chloride to obtain the same results. Fully explain these observations.

    © BrainMass Inc. brainmass.com October 3, 2022, 12:32 am ad1c9bdddf
    https://brainmass.com/chemistry/stoichiometry/salting-sidewalks-517604

    SOLUTION This solution is FREE courtesy of BrainMass!

    Each mole of CaCl2 contains 3 moles of ions whereas each mole of NaCl contains 2 moles of ions. Depression of freezing point is a colligative property which means its depends on the moles of particles. The more particles, the more the freezing point will depress. Hence to get the same depression in freezing point one can use less of CaCl2 as less mass of it will result in the same number of ions as more mass of NaCl.

    This content was COPIED from BrainMass.com - View the original, and get the already-completed solution here!

    © BrainMass Inc. brainmass.com October 3, 2022, 12:32 am ad1c9bdddf>
    https://brainmass.com/chemistry/stoichiometry/salting-sidewalks-517604

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