please answer part a 3. In vitro experiments are conducted at pH = 7.4 to simulate physiologicalconditions. A phosphate buffer system is often used.H₂POH₂РO+H+ ркA = 7.2a. What must be the ratio of the concentrations of HPO to H₂PO ions?b. What mass of NaH2PO4 must be added to 500.0 mL of 0.10 M Na₂HPO4(aq) in the preparation of the buffered solution?

a).The ratio of the concentrations of HPO42− to H2PO4− ions in the phosphate buffer system must be…

Answered: 3. In vitro experiments are conducted…

Curren'S Math For Meds: Dosages & Sol

11th Edition

ISBN:9781305143531

Author:CURREN

Publisher:CURREN

Chapter13: Dimensional Analysis/units Conversion

Section: Chapter Questions

Problem 2.4P

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At 39.9ºC, a solution of ethanol (XetOH = 0.9006, P * etOH = 130.4 Torr) and isooctane (P * iso = 43.9 Torr) forms a vapor phase with YetOH = 0.6667. The total pressure is 185.9 a. Calculate the activity and the activity coefficient of each component.b. Calculate the total pressure the solution would have if it were ideal.c. Comparing the ideal pressure to the actual pressure, what does this indicate about the molecular interactions?
2. The following question tests your lab skills as well as basic knowledge understanding: In Lab1- KHP Determination, 0.85 g moisturized NaOH (M.W.= 40.01 g/mol) solid was dissolved in 500.0 mL of water. 24.21 mL of this NaOH solution was consumed to reach the equivalence point when titrated with 0.2021 g of pure KHP (M.W.=204.22 g/mol. Solid was fully dissolved in 50 mL deionized water). (a). Please write the reaction equation (balanced). Then calculate the precise concentration of NaOH solution. List all steps. (b). What are the primary standard and secondary standard material in the above operation respectively? (c). During the above operation, what glassware/tools were used to measure 0.85 g NaOH, to store 1 liter NaOH solution, to measure pure KHP solid, to conduct the titration, respective ? (d). Can this titration be used to measure the pH value of an unknown solution? Why or why not? (e). Did we use a pH buffer solution in the…
1. Differentiate the following: a. pH from pOH ____________________________________________________________________________________________________________________________________________________________ b. Ka from Kb ____________________________________________________________________________________________________________________________________________________________ c. Pka from Pkb ____________________________________________________________________________________________________________________________________________________________ d. Kw from pKw ____________________________________________________________________________________________________________________________________________________________ 2. What is the importance of buffer systems in the human body?…
1. A prescription calls for 50 mg of chlorpheniramine maleate. Using a prescription balance with a sensitivity requirement of 6 mg, explain how you would obtain the required amount of chlorpheniramine maleate with an error not greater than 5%.
5. In the Chemical Changes experiment (E3) on copper, which of the steps can be omitted if our goal is only to obtain dry copper(II) oxide solid? a. Decanting and adding sulfuric acid to dissolve black precipitate b. Addition of NaOH to Cu(NO3)2 solution c. Filtering and heating until dry and fully black d. Boiling of previous solution until black
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3. Astelin nasal spray contains 0.1% azelastine hydrochloride and 400 µg/mL of benzalkonium chloride as a preservative. A container is capable of delivering 200 metered sprays of 0.137 mL each. The percent concentration of benzalkonium chloride in the preparation is ________ %, and this is equivalent to a ratio strength of 1:2500 w/v. True or False?
1- Using the pH 12 of the buffer and the pKa = 12.32. What is the molar ratio of A- to HA. 2- What is the molar amount of A- and HA needed to prepare a 0.2 M buffer? 3- How many grams of A- and HA are needed to prepare 40 mal of the buffer? The molar mass of HA is 142g/mol The molar mass for A- is 380.1g/mol
An unknown mixture is known to contain only Ba(OH)2 (MW=171.34 g/mole) and NaOH (MW=40.0 g/mole). If the mixture is known to contain 45% by mass NaOH, and 8.0 grams of the mixture is dissolved completely in 50.0 ml of solution, answer the following. c).If 10.0 ml of a 0.2 M solution of Na2SO4 was added to the 50.0 ml solution, what would be the final concentration of Na+ in solution.
Suppose you wanted to make a buffer of exactly pH 7.00 using KH2PO4 and Na2HPO4. If the final solution was 0.1 M in KH2PO4, what concentration of Na2HPO4 would you need?
6. Your pharmacy has on hand Robitussin CF Syrup (guaifenesin 100 mg/1 tsp).You receive a prescription for Robitussin CF Syrup and the patient is to receive 250 mg of guaifenesin q4h. How many milliliters will the patient receive in 1 dose? If you dispense a 4oz bottle of syrup, how many doses will the patient receive?
2 if there is a stock solution of 2000 (ug/ml) , is it possible to use SERIAL DILUTION to generate the following 8 tubes with their concentrations? A 2000 (ug/ml) B 1500 (ug/ml) C 1000 (ug/ml) D 750 (ug/ml) E 500 (ug/ml) F 250 (ug/ml) G 125 (ug/ml) H 0 (ug/ml)

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