24.
Calculating A sample of barium nitrate is placed into a jar containing water. The mass of the barium nitrate sample is 27 g. Assume the water is at 20 ºC and that the resulting barium nitrate solution is saturated. What mass of water is present in the jar? Use Figure 8-2 to answer this question. Show your work. (2 points)

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Question

24.  
Calculating A sample of barium nitrate is placed into a jar containing water. The mass of the barium nitrate sample is 27 g. Assume the water is at 20 ºC and that the resulting barium nitrate solution is saturated. What mass of water is present in the jar? Use Figure 8-2 to answer this question. Show your work.  (2 points)

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jfraser · Answer

It must also assume there's no leftover barium nitrate solid left in the jar? You need to use a solubility curve to find out what maximum mass of barium nitrate can be held by a given volume of water at 20C. Solubiilty curves usually standardize at 100mL of water. If it's 27g, then you've got 100mL of water present. If the saturation curve for barium nitrate occurs at 13.5g in 100mL of water, then you must have 200mL of water in the jar. Simply extrapolate from what the solubility curve gives you