Calculate the vapor pressure al 25.0 °C of a solution that has 11.5 g urea, CO(NH), dissolved in 250. ml. water. The vapor pressure of pure water at this temperature is 23.8 mm Hg. O 22.7 mm Hg 0.32 mm Hg 24.1 mm Hg Activity Window 23.5 mm Hg

Use Raoult's Law to determine the vapor pressure of a solution at 55°C that contains 34.2 grams of sodium chloride in 375 grams of water. The par pressure of pure water at 55°C is 118.1 torr. Assume 100% dissociation of the solute. 871 to 115 torr

2. Using the data given below, calculate the percentage of KHP in the impure sample. The molar mass of KHP is 204.219 g/mol. Molarity of NaOH Solution: Mass of Unknown: Volume of Water Used to Dissolve Unknown: Volume of NaOH Used to Reach Equivalence Point: Percent of KHP: 0.1955 M 1.1801 g 30.00 mL 17.01 mL % Stolal Vol)

Name Time M T W R F The freezing point of pure benzene (CH,) is 5.50°C. The freezing point of a solution containing 5.00 g of an unknown non-dissociating solute in 444 g of benzene is 5.07°C. K, of benzene = 4.90°C/m. Show complete calculations for each question below. 1. What is the freezing point depression for this solution?

Calculate the vapor pressure at 25.0 °C of a solution that has 11.5 g urea, CO(NH,), dissolved in 250. mL water. The vapor pressure of pure water at this temperature is 23 8 mm Hg O 22.7 mm Hg O 0.32 mm Hg O 24.1 mm Hg O 23.5 mm Hg Activate Windows Go to Settings to activate Windoe inspiron Enter Shift Alt Alt Ctrl

100 90 80 NANO 70 60 CaCl 50 Pb(NO,)2 40 KCT NaCi 30 20 KCIO, 10 Ce,(SO4)3 10 20 30 40 50 60 70 80 90 100 Temperature (°C) How much sodium chloride can dissolve at 90°C? Solubility (g of salt in 100 g H,O)

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A solution contains 6.56 g of KCl per 100 g of water at 30 °C. KNO, NANO, 100 CaCl, Pb(NO,), 90 - Use the solubility graph to determine if the KCl solution K,Cr,O, 80 is saturated, unsaturated or supersaturated. 70 - supersaturated 60 KCI saturated Na,SO, 50 unsaturated 40 NaCl 30 KCIO, 20- A solution contains 90.0 g of CaCl, per 100 g of water at 10 °C. 10 - 10 20 30 40 50 60 70 80 90 100 Temperature (°C) Use the solubility graph to determine if the CaCI, solution is saturated, unsaturated or supersaturated. supersaturated unsaturated saturated Solubility (g solute in 100 g H,O)