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Unformatted text preview: of water, what is the vapor pressure of the resulting solution? The vapor pressure of pure water is 23.8 at 25 . answer: 3.9/(.840+3.9)=.8228 .8228*23.8= 19.6 Torr' Part. B. A solution is composed of 1.60 cyclohexane ( ) and 2.10 acetone ( ). What is the total vapor pressure above this solution? 'answer: Pa= 1.6/(1.6+2.1)=.4324 , .4324 *97.6 = 42 torr Pb = 2.1/(2.1+1.6)=.567 , .567* 229.5 = 130 torr 42 +130 =172 torr As you saw in Part B, the vapor above the cyclohexaneacetone solution is composed of both cyclohexane vapor and acetone vapor. What mole fraction of the vapor above the solution, , is cyclohexane? answer: 42/172 = .245 How many liters of water are required to dissolve 1 gram of calcium phosphate? ANSWER:1 gram/3.41 X 10^5 grams/liter grams cancel and the answer is in liters . .. = 0.2933 x 10^5 liters = 2.933 X 10^4 liters =29,330liters Proof (2.933 x10^4 liters )( 3.41 x10^5grams/liter) = 10.001 X 10^1 = 1.001 grams Source(s): Ph.D.Biochem BS Chem...
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