WHAT IF? Given a liter of pure water and a liter solution of acetic acid, what would happen to the pH, ingeneral, if you added 0.01 mol of a strong acid to each?Use the reaction from question 3 to explain the result.
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WHAT IF? Given a liter of pure water and a liter solution of acetic acid, what would happen to the pH, in
general, if you added 0.01 mol of a strong acid to each?
Use the reaction from question 3 to explain the result.
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- What's the ratio? An acid with a pKapKa of 8.0 is present in a solution with a pHPH of 6.0. What is the ratio of the protonated to the deprotonated form of the acid? eMATHEMATICAL A catalog in the lab has a recipe for preparing 1 L of a TRIS buffer at 0.0500 M and with pH 8.0: dissolve 2.02 g of TRIS (free base, MW=121.1 g/mol) and 5.25 g of TRIS hydrochloride (the acidic form, MW=157.6 g/mol) in a total volume of 1 L. Verify that this recipe is correct.* Calculate the Molarity of solution have 20 g of Glucose sugar C12H22012 Dissolved in 125 g of water and the density of the solution Was 1.02 g/ml? If you know molar weight (C=12, O=16, H=1) O 0.412 M 0.401 M O 0.392 M
- (b) Explain each of the following in terms of the properties of water. You are not limited to the three properties discussed in part (a): • the role of water as a medium for the metabolic processes of cells • the ability of water to moderate temperature within living organisms and in organisms' environment • the movement of water from the roots to the leaves of plants B IU x2 X, 5 ¢ Ω 0/10000 Word Limit(b) Explain each of the following in terms of the properties of water. You are not limited to the three properties discussed in part (a): • the role of water as a medium for the metabolic processes of cells • the ability of water to moderate temperature within living organisms and in organisms' environment • the movement of water from the roots to the leaves of plants B IU 0/1In a 0.1000 M acetic acid solution at 25 degrees celsius , the acid ionizes to the extent of about 1.34 %. Since each molecule of acetic acid which ionizes produces 1 H+ ion and 1 C2H3O2- ion, the concentration in the solution are: HC2H3O2 < -----------> H+ + C2H3O2-
- The pKas of two hypothetical organic acids are given below. ACOOH ----> ACOO- + H+ (pKa = 4.15) BCOOH -----> BCOO- + H+ (pka = 4.55) by: The pH at which BOTH these acids will be soluble can be given OpH 4.55 4.15An appropriate biochemical buffer should have charges in both its conjugate acid and conjugate base form. This avoids the presence of a neutral form of the buffer that might be able slowly leak into cells. Does unmodified dimethylpiperazine meet this criterion when buffering at pH 8? O Yes No What about buffering at pH 4? D Yes NoWhat is molarity? Tell how to make a 1 M solution of Mg3(PO4)2and a 0.1 M solution of CaSO4.pH of solution 14.00 12.00 10.00 8.00 6.00 First 4.00 equivalence point 2.00 0 First midpoint Second equivalence point Third midpoint pH = pKa=12.32 Third equivalence point HPO4(aq) + OH(aq) PO4(aq) + H2O(1) Second midpoint pH = pKa = 7.21 H2PO4 (aq) + OH(aq) HPO42 (aq) + H2O(1) Using the Henderson- Hasselback equation, show how to create 2L of a 0.1 M KPhos pH 7.5 buffer using K2HPO4 and KH2PO4. The chart to the left should help you understand what pKa to start with. Show your work. pH = pKa = 2.16 H3PO4(aq) + OH(aq) H2PO4(aq) + H2O(l) 25.0 50.0 75.0 100.0 Volume of NaOH added (mL)Biochemistry - calculations 1. 500 mL of a 0.1 sodium phosphate buffer with pKa= 7.21, is diluted a) How would you dilute this buffer 100 times to make a final volume of 50 mL? Show the ratio to be added together. b) Calculate the pH of the buffer when it is diluted with dH2O c) Calculate the pH of the buffer when it is diluted with 0.3 M KCl 2. What is the normality of a 5 M phosphoric acid (SG = 1.88 g/cm3; 85% solution has a Mr of 98 g/mole)?1:56 .ll 0.02 KB/S 55 4.pdf CHEM 3141: BioChemistry Quiz no.4 - The double-stranded DNA sequence for a bacteria is shown below and it's coding for a hypothetical protein. The strand on top reads 5' to 3' left to right, while the strand on the bottom reads 5' to 3' right to left. The nucleotides are numbered 1 to 100. REMINDER: For this problem, transcription begins with and includes the red and underlined C/G (top strand/bottom strand) base pair and RNA polymerase proceeds from left to right along the DNA. 1. 20 40 5-СТСТСССТСТААТАТТСТGAGAТСТТАТАТСССССССТСААСАССАТСАА-3. ------+----------+ 3'-САСAGGCAGATTATAACACTCТАСААТАТАGGGCGGCAGTTCTGGТАСТT-5* 60 80 100 5'-ACAGGATAATCGCCTGCTGGGGCAAAGGCGGTGAAGGTAAAGGTGTTGCC-3' -------+ 3'-TGTCCTATTAGCGGACGACCCCGTTTCCGCCACTTCCATTTCCACAACGG-5' 1. What are the nucleotides of the resulting mRNA? Indicate the 5' and 3' ends of the mRNA. 2. What are the amino acids translated from the resulting mRNA? 3. Do the underlined nucleotides TAA (indicated in blue)…SEE MORE QUESTIONS