4. The solubility of sucrose is 320 g/100 g H20 at 70°C. a. How much sucrose can dissolve in 200 g of H20 at 70°C? b. Will 700 g of sucrose dissolve in 200 g of H20 at 100°C? Explain your reasoning.

1. A solution of potassium chloride, KCI, has 20 grams of the salt dissolved in 100 grams of water at 40 °C. Approximately how many more grams of the salt can be added to the solution before reaching the saturation point? 2. Determine the molarity of saturated Nacl (Na=23, Cl=35.45) solution at 90 c. 100 90 80 NaNO 70 60 CaCl 50 Pb(NO3)2 40 KCI NaCl 30 20 KCIO, 10 10 20 30 40 50 60 70 80 90 100 Temperature (°C) Solubility (g of salt in 100 g H,0) SONY K,Cr,O,

46.29 g of KOH is dissolved in 250. mL of water. (Please pay attention to sig figs!) What is the mass percent of KOH in this solution? (use the density of water 1.00g/mL) a. b. What is the concentration, expressed in molal (m = moles solute/kg solvent), of this initial solution? What is the concentration, expressed in molar (M = moles solute/liters solvent), of this initial solution? (assume that the addition of the KOH to the water did not change the C. volume, which is still 250.mL) d. If I add 500.mL of pure water to this 250.mL solution, what is the new concentration expressed in molar (M)? (Careful, what is the new volume after mixing?) e. If, instead, I took the 250. mL solution and evaporated the water until the solution had a volume of 150.mL, what would be the concentration of this this new solution expressed in molar (M)?

Calculate the solubility of CaF, in water at 25 °C. You'Il find K, data in the ALEKS Data tab. s. Round your answer to 2 significant digits. g x10

11. You have a solution that is 18.2% sodium thiosulfate, Na2S2O3 , by mass. a. What mass of sodium thiosulfate is in 75.0 g of solution? b. How many moles of sodium thiosulfate are in 75.0 g of solution? please show work

Explain the difference between a. a colloidal and a crystalline precipitate b. precipitation and coprecipitation c. peptization and coagulation of a colloid d. occlusion and mixed-crystal formation e. nucleation and particle growth

A solid mixture consists of 25.5 g of KNO3 (potassium nitrate) and 4.5 g of K₂SO4 (potassium sulfate). The mixture is added to 130. g of water. Use this solubility curve (Figure 1) to answer the Part C If the solution described in the introduction is cooled to 0 °C what mass of K2SO4 will crystallize?

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An aqueous solution at 28°C contains 5.6 g of a protein in a 325 mL sample. The osmotic pressure is 0.0313 atm. What is the molar mass of the protein? Show your work in a separate sheet.     a. 1.36 × 104 g/mol   b. 1.27 × 103 g/mol   c. 2.43 × 103 g/mol   d. 63.1 g/mol   e. 6.94 × 102 g/mol

Calculating the freezing point of an aqueous solution 3. What is the freezing point of an aqueous solution that contains 3 moles of the ionic solute Cack per once kilogram of water? €a* + 2CI Cacl2 4. What is the freezing point of an aqueous solution that contains 2.30 moles of rock salt (NaCI) per one kilogram of water? 5. What is the freezing point of an aqueous solution that contains 1.3 moles of MgC12 per 1 kg water?