2.Chem 237 rl4idterm I from Fall 2OO3'l"/Which statement(s) is(are)Jfalse about H-bonds? Indicate all that apply.,.d H-bonds are involved in tertiary structure of proteins.,H H-bonds are important in the structure of water(v the side chain of valine can H-bond with that of serine.A hydrogen bonding occurs in ice crystals.Sl^ H-bogds are not very strong, about 4 kcal/mol, so H-bonds are not a very important factor in the stabilityol proteln structure.Given the following compounds, which is a good choice for a butler at pH 6.8?g. MES pKu : 6. I@ phosphoric acid pK^: 7.2c. HEPES pKu 7.5d. Tris base pKu 8.3e. Not enough information-the volume of the buffer is also needed./-14"t 4Suppose you have two solutions:(l) 0.1 M acetic acid and (2) 0.1 M potassium acetate. You mix thesesolutions as follows: ,,. ... t(solution A) 50 mL of each I and2(solution B) 25 mL of I and 75 mL of 2 I q:.'; -,(solution CS lSmLof I and25 mLof2 - e1'.F* i-'iWhat are the relative pH values of the three solutions, A]frn'd CT*\ a:B:c}' a<B<c3.t/y-c. B<A<Ct-Atd}lc<A<B'
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