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March 27, 2017

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what is the concentration of the chloride ion when enough water is added to 12 grams of sodium chloride to make 4.0 Liters if solution?
(a) 0.025 M (b)0.05 M
(c) 0.1 M (d)0.2

  • chemistry - ,

    12 g of NaCl is 12/58.5 = 0.205 moles
    That gets dissolved into 4.0 l of H2O, resulting Na+ and Cl- concentrations of 0.051 moles/liter. The 0.05M answer is closest to that. They should not have dropped a significant figure.

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