Morphine sulfate has a pKb of 4.5. How much of morphine will be available to enter the CNS from plasma (pH 7.4)? a. 0-1% b. 1-10% c. 10-50% d. 50-90% e. 99-100%
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Chemistry
Morphine sulfate has a pKb of 4.5. How much of morphine will be available to enter the CNS from plasma (pH 7.4)? a. 0-1% b. 1-10% c. 10-50% d. 50-90% e. 99-100%
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- A 190.00 mL solution of 0.00300 M AB4 is added to a 340.00 mL solution of 0.00265 M CD5. What is pQsp for AD4? Answer: (11.251)Molar concentration of the dye stock solution: 2.52e-5 mol/L Solutions(Dilutions) Absorbance (A)(a.u.) 1 0.086 2 0.179 3 0.366 4 0.532 Solution 1: 1.00 mL of Blue#1 Stock Solution and 19.00 mL of distilled water Solution 2: 2.00 mL of Blue#1 Stock Solution and 18.00 mL of distilled water Solution 3: 4.00 mL of Blue#1 Stock Solution and 16.00 mL of distilled water Solution 4: 8.00 mL of Blue#1 Stock Solution and 12.00 mL of distilled water Using linear regression determine the absorbance/concentration relationship for the dye. [dye] = x A I got 0.00001920x but the answer is wrong can someone please help?(Q12) Hydrazoic acid (HN3) is a weak acid with a Ką of 2.5 x 105. What will be the equilibrium pH of a solution that is initially 0.349 M in hydrazoic acid?
- 7. Warfarin is a blood thinner known by its tradename Coumadin. Warfarin has a formula mass of 308.33 g/mol and a pka of 5.0. Sun et al (J. Pharm. Biomed. Anal. (2006) 42, 218-222) reported a plasma concentration of 567.6 ng/ml. (1.84 uM) warfarin in patients within one month of heart valve treatment. Blood pH is Z4. What percent of warfarin in the plasma is not deprotonated? The body has 5.0L of blood. но 22, warfarinConcentration of Reagents (NH4)2S2O8 KI Na2S2O3 0.25 M 0.22 M 0.19 M Volumes of Solutions S₂082 (mL) Starch soln (mL) KNO3 (mL) EDTA soln (mL) KI (mL) S₂O32- (mL) x 5 9.7 0.9 26.4 0.5 9.9 1.1 Using the above data determine the concentration of I at the moment the reaction begins. HINT: This is a mixing problem. Determine the total number of moles of I and divide this amount by the total volume (in L). Be careful... If you go back and try this exercise again the values will change. Read the question carefully! Answer:A slightly soluble salt has the formula A B1 and a Ksp of 6.1E-25. What is pB in a solution of this salt? Answer: (12.11)
- C7H6O3 + C4H6O3 <-> C9H8O4 + C2H4O2 1.0g of salicylic acid reacts completely with an recess if acetic anhydride. Whats the theoretical yield of aspirin in G?A chemist s preparing hydrofluoric acid (HF) buffer of PH = 4.00 for an experiment. She has 125 ml of 0.2 M HF solution. What mass of NaF should be dissolved in HF solution to achieve the desired PH? Ka of HF is 6.6 x 10. Please write your answer in one decimal point and a number only. (e.g. 8.5) Answer:4. In a particular hospital, a doctor ask you to prepare 1.50 L of 2.75 M ethyl alcohol (C2H5OH) solution to disinfect the equipment needed for a major operation. How do you prepare the condition being asked by the doctor? (5 pts.)
- 10.109 A 0.204 M NaOH solution is used to titrate 50.0 mL of an H,PO, solution. (10.7) a. Write the balanced chemical equation. b. What is the molarity of the H;PO4 solution if 16.4 mL of the NaOH solution is required?The volume of 0.6 M H2SO4 required to neutralize a 35 ml of NaOH with a concentration of 0.4 Select one: а. 16.8 ml Ob. 34.5 ml O c. 11.7 ml O d. 3.6 ml e. 20.4 ml Next page hp(Q47) What is the molar solubility of lithium phosphate (Lİ3PO4) at 25°C? The Ksp at this temperature is 2.37 x 10-11. O 2.21 x 10-4 M O 1.81 x 10-4 M O 9.68 x 10-4 M O 2.37 x 10-11 M. 4.87 x 10-4 M