Sodium tripolyphosphate (Na5P3O10) is used in many

Chapter 16, Problem 103

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Sodium tripolyphosphate (Na5P3O10) is used in many synthetic detergents. Its major effect is to soften the water by complexing Mg2 and Ca2 ions. It also increases the efficiency of surfactants, or wetting agents that lower a liquids surface tension. The K value for the formation of MgP3O103 is 4.0 108 . The reaction is . Calculate the concentration of Mg2 in a solution that was originally 50. ppm Mg2 (50. mg/L of solution) after 40. g Na5P3O10 is added to 1.0 L of the solution. M

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