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Q: What is the predominant form of EDTA at pH 5? a. H3Y- b.H2Y2- c.HY3- d. Y4-
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Q: 1.Describe other melting point apparatus that are available for routine analysis. 2. Explain the…
A: Melting point apparatus that are available for routine analyis:-
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Q: 2. Answer these questions about separating benzoic acid (pKa = 4.2) and aniline (which is basic, pKa…
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Q: Would HEPES or Tris be a better buff er at pH 7.5?
A: Interpretation- To tell about that which buffer ( HEPES or Tris ) is better at pH =7.5
Q: What is the gram equivalent weight of:
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Q: how to find culculated ka and literature Ka for acetic acid
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Q: An unknown weak base has a delta G of 25.0 at 298K. What is the Kb of this base? A) 4.05* 10^-5…
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Q: Ascorbic acid is a diprotic acid with pKa1 = 4.l and pK2 = 11.8. You have an ascorbate buffer with…
A: Given information, The pH of the ascorbate buffer is 11.2
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Q: What are the basic medium, acid medium, and zwitterion formulas of phenylalanine?
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Q: What is the fraction of EDTA at pH 10.7?
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Q: The pka of ascorbic acid is 4.2 at 24C. At what pH is the ratio of the deprotonated form to the…
A: Henderson Hasselbach equation is pH=pKa+log[deprotonated form][protonated form]
Q: MW (mg/mmol) Density (mg/uL) Amount used vanillin 152.15 XXXXX 400.0 mg acetic anhydride 102.09 1.08…
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- State in your own words what the abbreviation α Y4- means with regards to EDTA speciation in water. Calculate α Y4- for EDTA at (a) pH 3.50 and (b) 10.50.What are the consequences if an EDTA tube is filled first before a red top tube?Find the conc of free Mg2+ in 0.050 M Na2[Mg(EDTA)](i.e. MgY2-) at pH 9.00.
- Which are true for polarography? I Polarography is amperometry conducted with a dropping Hg electrode. II The diffusion current in the plateau region of the polarographic wave is proportional to the concentration of the analyte and is used for quantitative analysis. III The half-wave potential for maximum current is characteristic of a given analyte in a given medium and can be used for qualitative analysis for the analyte. IV Fresh Hg drops give reproducible results. V Polarography is used to primarily to study oxidations Hg may reduce when studying reductions. A.I, III, and IV B. II, III, and V C. I and V D. III, IV, and V E. II, III, and IVIf Vsu= Vorg, how many times should the extraction process be repeated in order for 1 g of substance with KD= 2.25 to pass 90.5% to the organic phase?Can electrogravimetry give total copper concentration and determine the concentration of specific species of either Cu(II) or Cu (I)? Why? And does it require a standard calibration curve? If not, how can the amount of analyte be determined?What about Polarography?
- kindly answer this problem and follow this format GIVEN REQUIRED SOLUTION and write regibly thank you so much For the adsorption of a substance A from aqueous solution by charcoal at25oC the freundlich constants are n=3.0 and k=0.50 for y in grams per gramand C in grams per liter. What weight of a W is adsorbed by 2 g of charcoalfrom 1 L of a solution containing originally 2 g of the substance?Why BH 3-THF not BH 3 is used in the experiment? Plz do Asap....!If Vsu= Vorg, how many times should the extraction process be repeated so that 1 g of substance with KD= 2.25 passes 90.5% to the organic phase?