Question

In: Chemistry

1. If 40.0 mg of methadone is dissolved in 100.0 mL of water, what is the...

1. If 40.0 mg of methadone is dissolved in 100.0 mL of water, what is the pH of the resulting solution?

2. The average biological half-life of methadone is 22 hours. If the process that breaks down is second order, what is the rate constant for the breakdown of the 100.mL solution in question 1?

3. What is the ∆Go for the protonation of methadone at 25 C?

The conjugate acid has a Ka of 3.98 x 10 .

  

Solutions

Expert Solution


Related Solutions

1. The hot metal piece weighing 2.500g at 100.0°C is dropped into 40.0 mL water at...
1. The hot metal piece weighing 2.500g at 100.0°C is dropped into 40.0 mL water at 20.0 °C. The final temperature of the system is 24.0°C. If the metal is treated as the system, the surrounding is: a) water b) styrofoam c) air d) metal 2. Is q(system) positive or negative ? 3. Calculate the specific heat of a solid metal (s(metal)), enter numerical value only. 4. According to the definition of q1, q2 and q3, calculate each of these...
1.250 g of H2C2O4 are dissolved into 100.0 ml of water which is then titrated with...
1.250 g of H2C2O4 are dissolved into 100.0 ml of water which is then titrated with 28.56 ml of NaOH solution. What is the molarity of the NaOH solution? H2C2O4 + NaOH arrow Na2C2O4 + H2O (not balanced) Select one: a. 0.6942 M b. 2.957 M c. 0.4862 M d. 1.945 M e. The correct answer is not given as an option.
A 1.00-g sample of piperazine hexahydrate is dissolved in enough water to produce 100.0 mL of...
A 1.00-g sample of piperazine hexahydrate is dissolved in enough water to produce 100.0 mL of solution and is titrated with 0.500 M HCl. A.) What is the initial pH of the solution, before any titrant is added? B.) The percent neutralization points for a titration indicate the percent of the reagent that has reacted. For example, at the 25% neutralization point for piperazine, 75% (0.75×[Pip]) of the base remains, and 25% is neutralized to form PipH+. Calculate the pH...
An unknown compound (152 mg) was dissolved in water to make 75.0 mL of solution. The...
An unknown compound (152 mg) was dissolved in water to make 75.0 mL of solution. The solution did not conduct electricity and had an osmotic pressure of 0.328 atm at 27°C. Elemental analysis revealed the substance to be 78.90% C, 10.59% H, and 10.51% O. Determine the molecular formula of this compound by adding the missing subscripts.
When 630. mg of a compund are dissolved in 6.00 mL water inside a calorimeter the...
When 630. mg of a compund are dissolved in 6.00 mL water inside a calorimeter the temperature increased from 19.0 ̊C to 23.0 ̊C. If the total number of Joules produced by this reaction was 202 Joules calculate the heat capacity of this calorimeter. Specific heat capacity of water = 4.184 J/g ̊C Density of water = 1.00 g/mL Please show work
4) 350.3 mg of BaCl2 (208.23 g/mol) is dissolved in 100 mL of water. It is...
4) 350.3 mg of BaCl2 (208.23 g/mol) is dissolved in 100 mL of water. It is then mixed with a solution made by dissolving 400 mg of ammonium sulfate (132.14 g/mol) in 200 mL of water. Assuming at this juncture that the BaSO4 formed is totally insoluble. What is the final concentrations (in ppm and mM) of Ba (137.327 g/mol) and sulfate (96.06 g/mol) in the solution.
1) If 100.0mL water of at 50.0C is added to 100.0 mL of water at 20.0C....
1) If 100.0mL water of at 50.0C is added to 100.0 mL of water at 20.0C. What temperature would the mixture of water reach? Assume the system is perfectly sealed and no heat is lost to the calorimeter or to the outside environment. 2) If a student’s coffee cups are discarded after the first HCl reaction and new coffee cups are used only for the final reaction with acetic acid. How would this error impact the results? 3) A chemistry...
Determine the %(p/p) of CaCO3 of a 25 mg chalk sample dissolved in 25 mL water,...
Determine the %(p/p) of CaCO3 of a 25 mg chalk sample dissolved in 25 mL water, 12.5 mL HCl 0.1 M, titrated with 8.6 mL NaOH 0.1 M.
If you combine 360.0 mL of water at 25.00 °C and 100.0 mL of water at...
If you combine 360.0 mL of water at 25.00 °C and 100.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.
If you combine 330.0 mL of water at 25.00 °C and 100.0 mL of water at...
If you combine 330.0 mL of water at 25.00 °C and 100.0 mL of water at 95.00 °C, what is the final temperature of the mixture? Use 1.00 g/mL as the density of water.
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT