Lehninger Principles of Biochemistry
7th Edition
ISBN: 9781464126116
Author: David L. Nelson, Michael M. Cox
Publisher: W. H. Freeman
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Chapter 2, Problem 25P
Summary Introduction
To determine: The weight in grams of sodium dihydrogen phosphate (NaH2PO4∙H2O; FW 138) and disodium hydrogen phosphate (Na2HPO4; FW 142) needed to prepare 1L of a standard buffer at pH 7.00 with a total phosphate concentration of 0.100 M.
Introduction:
The pH of the internal fluid of the cells is maintained by the phosphate buffer system. The buffer comprises of dihydrogen phosphate ions and hydrogen phosphate ions. The addition of extra hydrogen ion in the fluid of the cellular region, results in change in pH which is then neutralized by the hydrogen phosphate ion. Similarly, the change in pH caused by the action of the hydroxide ions is neutralized by the dihydrogen phosphate ion.
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The right-hand side of this reaction shows the product of an aldol condensation. What are the reactants missing from the left-hand side? Draw them below.
?
NaOH
Δ
If there aren't any reactants that would lead to these products under the reaction conditions given, just check the box under the drawing area.
Note for advanced students: don't worry if the reactants you propose might also make some other products under these reaction conditions. Just make sure the
product above is one of the major products.
Please help! I need to identify four labeled unknown bottles based off of their colors doing titration using phenlphtalein. I've included my answers, but I wanted to make sure they were correct and if not, what will be correct thank you in advance.
An organic chemistry Teaching Assistant (TA) suggested in your last discussion section that there is only one major organic product of the following reaction and
that this reaction builds a ring.
If the TA is right, draw the product in the drawing area below. If the TA is wrong, just check the box below the drawing area.
NaOH
?
Chapter 2 Solutions
Lehninger Principles of Biochemistry
Ch. 2 - Prob. 1PCh. 2 - Prob. 2PCh. 2 - Prob. 3PCh. 2 - Prob. 4PCh. 2 - Prob. 5PCh. 2 - Prob. 6PCh. 2 - Prob. 7PCh. 2 - Prob. 8PCh. 2 - Prob. 9PCh. 2 - Prob. 10P
Ch. 2 - Prob. 11PCh. 2 - Prob. 12PCh. 2 - Prob. 13PCh. 2 - Prob. 14PCh. 2 - Prob. 15PCh. 2 - Prob. 16PCh. 2 - Prob. 17PCh. 2 - Prob. 18PCh. 2 - Prob. 19PCh. 2 - Prob. 20PCh. 2 - Prob. 21PCh. 2 - Prob. 22PCh. 2 - Prob. 23PCh. 2 - Prob. 24PCh. 2 - Prob. 25PCh. 2 - Prob. 26PCh. 2 - Prob. 27PCh. 2 - Prob. 28PCh. 2 - Prob. 29PCh. 2 - Prob. 30PCh. 2 - Prob. 31PCh. 2 - Prob. 32PCh. 2 - Prob. 33PCh. 2 - Prob. 34PCh. 2 - Prob. 35PCh. 2 - Prob. 36PCh. 2 - Prob. 37PCh. 2 - Prob. 38DAP
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- A student suggests that the molecule on the right can be made from a single molecule that doesn't have a ring. If the student is correct, draw the starting material below, otherwise, check the box under the drawing area. Click and drag to start drawing a structure. : ☐ + NaOH टेarrow_forwardRate = k [I]1.7303[S2O82-]0.8502, Based on your rate, write down a mechanism consistent with your results and indicate which step is the rate determining step.arrow_forward36. Give the major product(s) of each of the following reactions. Aqueous work-up steps (when necessary) have been omitted. a. CH3CH=CHCH3 b. CH3CH2CH2CCH3 H,PO₂, H₂O, A (Hint: See Section 2-2.) 1. LIAIH. (CH,CH,),O 2. H', H₂O H NaBH, CH,CH₂OH d. Br LIAIH. (CH,CH,)₂O f. CH3 NaBH, CH,CH,OH (CH3)2CH H NaBH, CH,CH₂OH Harrow_forward
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- 6. Ammonia reacts with nitrogen monoxide and oxygen to form nitrogen and water vapor. If the rate of consumption of NO is 4.5 mollitermin) (a) Find the rate of reaction (b) Find the rate of formations of N; and HO (c) Find the rate of consumption of NH, and O 4NH: 4NO 0:4: +60arrow_forward34. Give the expected major product of each of the following reactions. Conc. HI a. CH3CH2CH2OH b. (CH3)2CHCH2CH2OH Conc. HBr H Conc. HI C. OH Conc.HCI d. (CH3CH2)3COHarrow_forward42. Which of the following halogenated compounds can be used successfully to prepare a Grignard reagent for alcohol synthesis by subsequent reaction with an aldehyde or ketone? Which ones cannot and why? H3C CH3 a. Br H OH b. Cl C. I H H d. Cl e. H OCH3 Br Harrow_forward
- For each reaction below, decide if the first stable organic product that forms in solution will create a new CC bond, and check the appropriate box. Next, for each reaction to which you answered "Yes" to in the table, draw this product in the drawing area below. Note for advanced students: for this problem, don't worry if you think this product will continue to react under the current conditions - just focus on the first stable product you expect to form in solution. ? Will the first MgBr product that forms in this reaction create a new CC bond? olo ? OH جمله O Yes Ⓒ No MgCl ? Will the first product that forms in this reaction create a new CC bond? Click and drag to start drawing a structure. Yes No X ☐ : ☐ टे PHarrow_forwardAssign all the protonsarrow_forwardPROPOSE REACTION MECHANISM FOR ACID-CATALYZED REACTION OF 3-PENTANONE WITH DIMETHYLAMINEarrow_forward
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