60) A 0.15 m aqueous solution of a weak acid has a freezing point of -0.31 degre
ID: 860170 • Letter: 6
Question
60) A 0.15 m aqueous solution of a weak acid has a freezing point of -0.31 degree C. What is the percent ionization of this weak acid at this concentration? The molal freezing-point-depression constant of water is 1.86 degree C/m. 61) A 1.35 m aqueous solution of compound X had a boiling point of 101.4 degree C. Which one of the following could be compound X? The boiling point elevation constant of water is 0.52 degree C/m. 2) A solution is prepared try dissolving 15.0 g of NH3 in 250 g of water. The density of the resulting solution is 0.974 g/mL. The mole fraction of NH3 in the solution is There are paired and unpaired electrons in the Lewis symbol for a phosphorus atom. How many grams of NaOH (MW = 40.0) are there in 500.0 mL of a 0.175 M NaOH solution? The freezing point of ethanol (C2H5OH) is -114.6 degree C. The molal freezing point depression constant for ethanol is 2.00 degree C/m. What is the freezing point (degree C) of a solution prepared by dissolving 50.0 g of glycerin (C3H803, a nonelectrolyte) in 200 g of ethanol?Explanation / Answer
60) D
61) E
62) A
63) A
64) D
65) E
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