1. Will a 5% preparation of caffeine citrate compounded in citrate buffer, pH 4.8 with no additional co-solvents be a solution – Yes or No? Explain. The MW of caffeine is 194.19 Da and that of caffeine citrate is 386.3 Da. The intrinsic solubility of caffeine is 2.17g/100 mL. please explain the answer.

Q: The titration of 50.0 mL of 0.100 M acetic acid (Ka = 1.75 x10^-5) with 0.200 M sodium hydroxide at…

A: We need to calculate pH for the given titration

Q: Be sure to answer all parts. A microbiologist is preparing a medium on which to culture E. coli…

A:

Q: The pH of a 0.5L HNO2-NO2 buffer solution was determined to be 4.23. The solution was mixed with 5g…

A: Given, pH of buffer solution = 4.23 pKa = 4.35 Volume of buffer solution = 0.5 L weight of HNO2 = 5…

Q: A 200.00 mL solution of 0.00105 M AB4 is added to a 270.00 mL solution of 0.00245 M CD5. What is…

A: Assuming the salts AB4 and CD5 are soluble in water completely as no information is given about…

Q: In solution, fentanyl is most stable in the pH range 3.5-7.5. What mass of acetic acid and sodium…

A: Solution- Data given-  volume is 1 L, concentration is 30 mM, molecular mass (RMM) of acetic acid…

Q: what volume of 2.00 M NaOH should be added to 250.0 ml of 1.00 M glycolic acid(Ka = 1.48 x 104) to…

A: Given data: Molarity of NaOH = 2 M Molarity of glycolic acid = 1 M Volume of glycolic acid = 250 mL…

Q: At temperature 25°C, 0.02 M hydrazine, N2H4 solution is 0.69% ionised. Calculate the i.…

A: Since you have asked multiple question, we will solve the first question for you.If you want any…

Q: 4) How would your calculated value of Ksp be affected by errors introduced from the following…

A: The constant relating the dissolved ions' concentrations is taken as "Solubility product". Some…

Q: Write the reaction between formic acid (Appendix B) and KOH. What is the equivalence volume (Ve) in…

A: As there are many subparts of the question and any specific subpart is not mentioned here, so solve…

Q: Why is the use of high-precision volumetric material essential for titration?

A: Volumetric analysis is a technique used to determine the unknown concentration of a reactant with…

Q: D. Preparation of a Buffer from a Solution of a Weak Acid So far in this experiment the buffers that…

A: Pka=pH So B-=HB

Q: Ammonium acetate (CH3COONH4) is also a salt of weak acid (CH3COOH) and weak base (NH4OH). The Ka and…

A: Option b is correct. This is because on hydrolysis ammonium acetate produces ammonium hydroxide and…

Q: Find the solubility of AgI in 3.3 M NH3. (Ksp of AgI = 8.3 10-17 and Kf of Ag(NH3)2+ = 1.7 107)

A: Given, KSP for AgI = 8.3 × 10-17 KSP for Ag(NH3)2+ = 1.7 × 107 Concentration of NH3 = 3.3 M   Let S…

Q: In this exercise, using the Henderson-Hasselbach equation, you will be asked to make the necessary…

A: Given: Volume of buffer solution = 100 mL pH of buffer solution = 9.02  Concentration of acid and…

Q: 25.0 cm3 of sodium hydroxide solution is tritrated against 0.2 mol dm–3 hydrochloric acid until the…

A: Given,  Volume of the NaOH = 25.0 cm3  Molarity of HCl = 0.2 mol/dm3  Volume of HCl = 27.5 cm3  At…

Q: 2. After preparing the buffer, they decided to determine the buffer capacity of the solution by…

A:

Q: liters of a 5% w/v boric acid so should be used to obtain the boric acid needed in preparing 1 liter…

A:

Q: 5. Why should the titration solution be buffered at pH 10.0?

A: In complexometric titration the titrant used is EDTA. EDTA forms a complex with the metal ions which…

Q: Calculate the molar concentration barium hydroxide  solution if it  was standardized against 0.1112…

A:

Q: the pH of a 100mL buffer solution containing 0M HC2H3O2 and 1.0M NaC2H3O2 after 30mL of 1.0M NaOH…

A: Given question is based upon acidic buffer . So we will use Henderson-Hasselbalch equation.

Q: A biochemist working with bacteria requires a culture buffered at a pH of 3.6. Which of the…

A: Given that:  pH = 3.6 Buffer solution is mixture of weak acid and its conjugate base . Buffer…

Q: 5. A series of solutions containing NaOH, Na2CO3, and NaHCO3, alone or in compatible combination,…

A:

Q: CrO42- can be used as an indicator when Br- is titrated with Ag+. What concentration of CrO42-…

A:

Q: What would be your best choice to prepare a 100 mL of pH 5.5 buffer strength 0.50 M? (pKa of acetic…

A: pH of buffer solution = 5.5

Q: Calculate the values expected for the total alkalinity and for the phenol- phthalein alkalinity of a…

A: The total alkalinity of water is defined as the measure of the amount of OH-, HCO3-, and CO32-…

Q: Calculation at the post-equivalence point region of a complexation titration:   What is the pSr…

A:

Q: Determine the Ksp of an acidic salt through titration. Using a .10M solution of NaOH titrate a…

A: Solubility product of KHT can be determined from its solubility, deduced from the titration with…

Q: Consider only the first dissociation constant of a 10-4 M solution of boric acid (H3BO3): a) develop…

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for…

Q: Malin just discovered a new protein, Malinase and for it not to unfold and lose its function, he…

A: Given the required pH of the buffer solution = 11.90 Volume of the buffer required = 50.0 mL Total…

Q: A 50.00-mL sample of water containing Ca2+ and Mg2+ is titrated with 10.28 mL of 0.01001 M EDTA in…

A: Given: Volume of water sample = 50.00 mL Concentration of EDTA = 0.01001 M Volume of EDTA at 1st…

Q: How would you make up 1 L of a 20X stock solution of the following buffer?  50mM glucose…

A: A 20X stock solution means the stock solution which is 20 times more concentrated than the…

Q: Calculate the pH of a buffer solution containing 10.0 cm³ of 0.100 mol dm-³ NaOH and 20.0 cm³ of…

A: 1 dm^3 = litre  1 cm^3 = milli litre  Millimoles = molarity (mol/L)* volume (in ml)

Q: Calculation at the equivalence point of a complexation titration: What is the pSr value of a 50.00…

A: Kindly get the answer given below.

Q: Calculate the molar solubility of Ca(OH)2 in the presence of the dissolved CaCl2 Concentration of…

A: For Trial 1 Concentration of the standardised HCl is given as 0.0646 M. Volume of the sample taken…

Q: Would the indicator bromocresol green, with a transition range of pH 3.8–5.4, ever be useful in the…

A: weak acid react with strong base, it give basic solution. So, the pH of the solution after…

Q: Use systematic treatment of equilibrium to calculate the molar solubility of AgIO3 in an aqueous…

A: Solution to the question is given below ?

Q: Show that the equivalence point N1V1=N2V2 where V1mL of analyte of strength N1 reacts with V2L of o…

A: At the equivalence point, equivalent quantities  of titrant and analyte have chemically reacted with…

Q: Titration of 50.00 mL of 0.04715 M Na2C2O4 req

A: Given redox reaction is        +7                +3                                       +2…

Q: What is the mole ratio of sodium acetate to acetic acid (Ka=1.8 x 10^-5) in a buffer with the pH of…

A: Given- Ka=1.8×10-5 pH=4.00

Q: 2) The following experimental process steps have been made to determine the hardness of water.…

A: Hard water does not form lather with soap instead from a curd-like substance. It is due to the…

Q: When a drop (taken to be 0.20 cm3) of 1.0 M HCI(aq) is added to 25 cm3 of pure water, the resulting…

A: Calculate the number of moles of HCl, ethanoic acid and sodium ethanoate. Number of moles =…

Q: As a chemist, you know that when analyzing a 50-ml sample for total hardness, every milliliter (1.00…

A: General chemistry

Q: The standardization of same titrant during the determination of BOD5 of water sample was done…

A: When standard sodium thiosulphate is prepared it is standardized with primary titrant like potassium…

Q: A weak acid (HA) with a pKa of 4.0 has a distribution constant of 5.2 between an organic and aqueous…

A: The fraction of HA acid in the organic phase at pH 2 and 6 is calculated:

Q: You are asked to go into the lab and prepare an acetic acid -sodium acetate buffer solution with a…

A: The molar ratio of CH3COOH to CH3COONa has to be determined

Q: In this exercise, using the Henderson-Hasselbach equation, you will be asked to make the necessary…

A: Answer-a Henderson-hasslebalch equation is: pH=pKa+log[Base][Acid] if [Base]=[Acid}, then…

Q: DETERMINATION OF WATER HARDNESS BY EDTA TITRATION 1. Why is it needed to add a pH 10 buffer to the…

A: Interpretation :  We have to tell it is need to add a pH 10 buffer to sample during EDTA titration…

Potentiometric Titrations

Potentiometric titration is one of the important titration methods and is mainly carried out to characterize acid solutions. It follows a method similar to that of the normal titration technique, but the main difference is that there is no indicator used in the potentiometric titrations. Instead of using an indicator, electrodes are employed for monitoring the whole titration process. A scientist named Robert Behrend did the potentiometric titration for the first time, and it was done using the mercurous solution and potassium chloride.