Question

The solubility of Drug X at 35oC is 0.5 moles/L. Predict the solubility of this compound...

The solubility of Drug X at 35oC is 0.5 moles/L. Predict the solubility of this compound at 25oC. The ΔHsoln of this compound is “-13700” cal/mol and R is1.987cal/mol/deg.

Homework Answers

Answer #1

We know that ln(S'/S) = (-ΔHsoln/R) x [(1/T')-(1/T)]

Where

S = solubility at temerature T (35oC) = 0.5 moles/L

S' = solubility at temerature T (25oC) = ?

T = initial temperature = 35oC = 35+273 = 308 K

T' = final temperature = 25 oC = 25+273 = 298 K

ΔHsoln = -13700 Cal/mol

R = gas constant = 1.987 Cal/mol/deg

Plug the values we get

ln(S'/0.5) = (-(-13700)/1.987) x [(1/298)-(1/308)]

              = 0.751

    S' / 0.5 = e0.751 = 2.12

        S' = 2.12 x 0.5 = 1.06 moles/L

Therefore the required soluybility is 1.06 moles/L

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
The solubility product constant Ksp of Mn(OH)2 is 2.1 x 10-13 at 25oC. The molar mass...
The solubility product constant Ksp of Mn(OH)2 is 2.1 x 10-13 at 25oC. The molar mass of Mn(OH)2 is 88.96 g/mol. a. Calculate its molar solubility b. Calulate its solubility in g/L
MgF2 has Ksp = 7.4 x 10-11. What is the solubility of MgF2 in mol L-1?
MgF2 has Ksp = 7.4 x 10-11. What is the solubility of MgF2 in mol L-1?
1. At 25 oC the solubility of lead(II) iodide is 1.52 x 10-3 mol/L. Calculate the...
1. At 25 oC the solubility of lead(II) iodide is 1.52 x 10-3 mol/L. Calculate the value of Ksp at this temperature. Give your answer in scientific notation to 2 SIGNIFICANT FIGURES (even though this is strictly incorrect). 2. At 25 oC the solubility of zinc hydroxide is 1.71 x 10-6 mol/L. Calculate the value of Ksp at this temperature. Give your answer in scientific notation to 2 SIGNIFICANT FIGURES (even though this is strictly incorrect).
Calcium fluoride, CaF2, has a molar solubility of 2.1 x 10^–4 mol L^–1 at pH =...
Calcium fluoride, CaF2, has a molar solubility of 2.1 x 10^–4 mol L^–1 at pH = 7.00. By what factor does its molar solubility increase in a solution with pH = 3.00? The pKa of HF is 3.17. The answer is 1.83
How many moles of xylene would be contained in an empty warehouse (200' x 50' x...
How many moles of xylene would be contained in an empty warehouse (200' x 50' x 20') with 10 ppmv xylene in the air @ 15 degrees celsius and pressure of 1 atm ( 0 C = 273 K; 1 ft^3 = 28.32 L) MW of xylene = 106g/mol R = 8.205E-5 atm-m^3 / mol-K
1)At 25 oC the solubility of silver iodide is 8.94 x 10-9 mol/L. Calculate the value...
1)At 25 oC the solubility of silver iodide is 8.94 x 10-9 mol/L. Calculate the value of Ksp at this temperature. Give your answer in scientific notation to 2 SIGNIFICANT FIGURES (even though this is strictly incorrect) 2)The Ksp of Al(OH)3 is 1.0 x 10-33. What is the solubility of Al(OH)3 in 0.0000010 M Al(NO3)3? Give your answer using scientific notation and to 2 significant figures (i.e., one decimal place).
1. There are 3.01 x 10^23 atoms present in a) 0.5 mol of Na b) 0.5...
1. There are 3.01 x 10^23 atoms present in a) 0.5 mol of Na b) 0.5 mol of C c) 0.5 mol of Ar d) none of the above e) all of the above 2. Which of the following scenarios does NOT represent a quantitative analysis? a) A chemist tests a sample of water for the presence of chloride ions. b) A police officer uses a breathalyzer to measure the amount of alcohol in exhaled air. c) A lifeguard tests...
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT