Question

Part A KCIO3 E 80 Express the mass in grams as an integer. E 60 30 20 0 10 20 30 40 50 60 70 80 90 100 Incorrect: Try Again; 2 attempts remaining By referring to the figure above, determine the minimal mass of each of the following salts required to form a saturated solution in 250 g of water at 30 C To determine the saturation point of KCIOs, find where its curve (shown in orange in the figure) intersects with 30°C. The corresponding point on the y axis is the mass required to create a saturated solution prepared with 100 g of water at that temperature. Use that value to determine what mass is required to saturate a solution prepared with 250 g of water You may want to reference (Page) Section 13.3 while completing this problem. Part B Pb(NO)2 Express the mass in grams as an integer

explain how to obtain the answer for

part a KClo3

part b Pb(NO3)2

partc Ce2(SO4)3

Answer 1

The graph shows the lines of maximum solubility of each salt at different temperatures, the salt mass is determined to prepare a saturated solution in each case:

A) m KClO3 = 250 g H2O * (10 g KClO3 / 100 g H2O) = 25 g KClO3

B) m Pb (NO3) 2 = 250 g H2O * (65 g Pb (NO3) 2/100 g H2O) = 162.5 g Pb (NO3) 2

C) m Ce2 (SO4) 3 = 250 g H2O * (1 g Ce2 (SO4) 3/100 g H2O) = 2.5 g Ce2 (SO4) 3

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