6 5 Consider the weak acid H₂A and its conjugate base HA-. Which diagram below represents a buffer solution? Explain your 362 answer. A = H₁₂A Exploring General, Organic, & Biochemistry in the Laboratory B = HA-

Please sir solvvvve this question, and please write down the reference, thanks sir

80mL of a 0.3M solution of hexapeptide Leu-His-Cys-Glu-Asn-Arg is adjusted to pH=pI. The solution is then titrated with 0.2M HCL to a final pH of 2.1. Sketch the titration curve, labelling the pH and volume axes. Indicate the volume of HCL needed to reach relevant pKa value and equivalence point(s)z Relevant pKa values are: 2.1, 4.3, 6.0, 8.3, 9.8, and 12.5.

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Hi! For the first part, you need to put appropriate reagent (found below the diagram) to the space provided that will yield the given results. For the second part, you need to determine the reagent/s needed to confirm the identity of the cation from question 1. There can be more than one answer.    Thank you!

A) Identify the structures that would be found in proteins B) identify the structures that polymerize via condensation reactions

need help to calculate P1 for amino acid Tryptophan. Also please check if I draw the mechanism correctly and completely？？？

Thank ypu very much for your assistance as it is greatly appreciated.

Paper electrophoresis of Asn, Ala, Asp, Lys and Ser mixtures at pH = 7 shows the fastest movement towards the anode The fully saponified 10g oil sample consumed 1.87g KOH, and the iodine value of the oil was 28.3. So how many unsaturated double bonds are there in each oil molecule on average? (lodine is known to have an atomic weight of 127) Given that 100g cellulose sample is completely hydrolyzed to obtain 78g glucose, then the percentage of cellulose in the sample is _% Given that the Km of catalase is 20mmol/L and the substrate concentration is 80mmol/L, then the percentage of catalase bound to the substrate is %

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