Henderson hasselbach - Study guides, Class notes & Summaries

CHM142 Exam 3 Questions And Answers 2024 A+ Review Buffer - ANS-Something that minimizes impact of the external force (in acid-base systems, force = pH) Acid-Base Buffer - ANS-A solution that will minimize changes in pH upon the addition of acid or base What is a buffer made of? - ANS-An acidic and a basic component - a conjugate acid-base pair (weak acid and conjugate base or weak base and conjugate acid) How do buffers work? - ANS-Through the common ion effect Common Ion Effect - ANS-Oc...

Buffer Order and Henderson Hasselbach - Water, Buffer, Salt, Base pH = pKa + log(A/HA) pKa decrease as temp increase so pH decrease Ramachandran plots - Φ = N-R ψ = C-R optimal angle to prevent steric hinderance Protein structure of a helix, B sheet, reverse turn - a: LEMARKHQ B: VICYFTW RT: PSDNG how many amino acids in alpha turn helix - 3.6 Super secondary structure - helix turn helix parallel vs. antiparallel - parallel wedges face same way antiparallel face opposite ...

1. A weak acid, HA, has a pKa of 4.11. a) At pH 7.11, what will the ratio of conjugate base to acid be? (Henderson-Hasselbach equation: pH=pKa + log [A-]/[HA]) b) Based on answer to "a," is there more HA or A- at that pH? c) At pH 2.11, what will the ratio of conjugate base to acid be? d) Based on answer to "c," is there more HA or A- at that pH? e) At pH 4.11, what will the ratio of conjugate base to acid be? f) Fill in the blank: if pH is greater than the pKa of a weak acid, there w...

ACS BIOCHEMISTRY EXAM QUESTIONS AND ANSWERS ALL CORRECT Henderson-Hasselbach Equation - ANSWER pH = pKa + log ([A-] / [HA]) FMOC Chemical Synthesis - ANSWER Used in synthesis of a growing amino acid chain to a polystyrene bead. FMOC is used as a protecting group on the N-terminus. Salting Out (Purification) - ANSWER Changes soluble protein to solid precipitate. Protein precipitates when the charges on the protein match the charges in the solution. Size-Exc...

Chem Exam 3 Things to Know 100% Verified Review Solution 2024/2025 Before starting a titration equation, what do we need to find? - ANS-Ka/Kb (given the other), volume, concentration of acid and base, initial mols of weak acid/base at the starting point of a titration, how do you find pH? - ANS-use a RICE table to find K expression equation, plug initial (not titrant) concentration into table and when you have K expression, solve for X. take -log of x for pH at the buffer region of a ti...

Buffer Order and Henderson Hasselbach - Water, Buffer, Salt, Base pH = pKa + log(A/HA) pKa decrease as temp increase so pH decrease Ramachandran plots - Φ = N-R ψ = C-R optimal angle to prevent steric hinderance Protein structure of a helix, B sheet, reverse turn - a: LEMARKHQ B: VICYFTW RT: PSDNG how many amino acids in alpha turn helix - 3.6 Super secondary structure - helix turn helix parallel vs. antiparallel - parallel wedges face same way antiparallel face opposit...

how is a micelle structured? correct answers hydrophobic parts stick together on the inside, while the hydrophilic parts face the outside What is the leading cause of childhood blindness? correct answers Vitamin A deficiency Patients of what disease do not absorb Vitamin A? correct answers Cancer and Chron's disease patients Van der Waals reaction is... correct answers A temporary dipole moment between non polar molecules Example of a hydrophobic interaction correct answers when sou...

1. A weak acid, HA, has a pKa of 4.11. a) At pH 7.11, what will the ratio of conjugate base to acid be? (Henderson-Hasselbach equation: pH=pKa + log [A-]/[HA]) b) Based on answer to "a," is there more HA or A- at that pH? c) At pH 2.11, what will the ratio of conjugate base to acid be? d) Based on answer to "c," is there more HA or A- at that pH? e) At pH 4.11, what will the ratio of conjugate base to acid be? f) Fill in the blank: if pH is greater than the pKa of a weak acid, there w...

Acid + Base -> correct answer: Salt + Water Molarity (M) correct answer: Number of moles per liter Titration of Vinegar correct answer: First drops will cause brief appearance of pink that quickly fades Near endpoint, more of the flask will turn pink but still fade after a few seconds Endpoint When entire flask turns pink and stays that way without adding another drop Buffer correct answer: - Solution that resists a change in pH when a small amount of acid or base is added ...

ACS BIOCHEMISTRY EXAM 2022 WITH COMPLETE SOLUTION;VERIFIED CORRECTLY