1) What mass of water is needed to dissolve 43.5 g of copper(II) chloride to prepare...
Calculate the boiling point of the solution when 15.0 g of aluminum chloride, is dissolved in 750 g water. The kb for water is 0.512°C/m.
The freezing point of water is 0.00°C at 1 atmosphere. A student dissolves 12.54 grams of chromium(II) acetate, Cr(CH3COO)2 (170.1 g/mol), in 158.2 grams of water. Use the table of boiling and freezing point constants to answer the questions below. Solvent Formula Kb (°C/m) Kf (°C/m) Water H2O 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCl3 3.67 Benzene C6H6 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02 The molality of the solution is m. The freezing point of the solution is °C....
F. A solution was prepared by dissolving 0.800 g of sulfur S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point and boiling point of the solution . For the solvent, Kb = 3.08 oC/m and Kf = 3.59 oC/m. G. Butylated hydroxytoluene (BHT) is used as an antioxidant in processed foods. (It prevents fats and oils from becoming rancid.) A solution of 2.500 g of BHT in 100.0 g of benzene had a freezing point of...
115 grams of KCl is dissolved in 750 ml of water (assume density = 1.005 g/ml). What are the molality, molarity, mole fraction, mole percent, % mass, ppm by mass? What would be the freezing point and boiling point of that solution assuming the Kf of water is 1.86 oC/m and Kb is 0.512 oC/m (assume that KCl fully dissociates with no pairing of ions)?
The boiling point of water is 100.00 °C at 1 atmosphere. A student dissolves 12.31 grams of cobalt(II) acetate, Co(CH3COO)2 (177.0 g/mol), in 287.1 grams of water. Use the table of boiling and freezing point constants to answer the questions below. Solvent Formula Kb (°C/m) Kf (°C/m) Water H2O 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCl3 3.67 Benzene C6H6 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02 The molality of the solution is _____m. The boiling point of the solution is °____C....
0.01 mol of sodium chloride, NaCl, is dissolved in 100 g of water. By how much would this elevate the boiling point? The boiling point elevation constant, kb, of water is 0.512 °C/m. A. 0.0512 °C OB.5.12 °C OC. 0.102 °C OD.5.12 x 10-5 oC
Question 5 O out of 1 points Lanthanum(III) chloride dissolves in water according to: LaCl3(s) + La3+ (aq) + 3 Cl(aq). What is the boiling point of the solution when 0.2453 g of LaCl3 (molar mass 245.3 g/mol) is dissolved in 10.0 g of H20? (Kb of water is 0.512 °C/m.) Selected Answer: Correct Answer: B. 100.0512 °C D. 100.205 °C
A solution is made by dissolving 25.7 g of copper(II) chloride, CuCl2, in enough water to make exactly 100 mL of solution. Calculate the concentration (molarity) of CuCl2 in mol/L (M). M CuCl2
The boiling point elevation of an aqueous sucrose solution is found to be 0.58°C. What mass of sucrose (molar mass=342.30 g/mol) would be needed to dissolve in 450.0 g of water? Ký (water) = 0.512°C/m. (partial credit available) 528 g sucrose 174g sucrose 261 g sucrose 224. g sucrose 762 g sucrose
5. A mass of 31.65 g of sodium chloride is added to 218.7 g of water at 34 °C. What will be the boiling point of the solution? Assume the sodium chloride completely dissociates in the water. Kh water=0.512 °C/molal. Slo ogni sebe