d An aqueous solution of carbonic acid H 2 CO 3 K a1 43x10 7 K a2 56x10 11 will

# D an aqueous solution of carbonic acid h 2 co 3 k a1

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d) An aqueous solution of carbonic acid (H2CO3) Ka1= 4.3x10-7; Ka2= 5.6x10-11will act as a buffer at which of the following pHs?e) In order to prepare 500.0 mL of a buffer with a total concentration of 0.5 M and a pH of 7.0, either Na2CO3(MW = 106) or NaOCl (MW = 74.4) could be combined with 1.0 M HCl(aq)and water. What mass of NaOCl and what volume of 1.0 M HCl would be necessary to make a buffer with a pH = 7?f) Which buffer would require thesmallest volume of 1.0 M HCl? Na2CO3NaOCl neither(Circle one answer in the box.)mass NaOCl gvolume 1.0 M HCl mL2c) What is the mol% of HOCl at a pH of 7.0?The text refers to an efficacy of 73% at a pH of 7.0.....34743(Circle ALL that apply) 3 4 5 6 7 8 9 10 11 12
230_F15_E4_p4Name:___________________________________6) Sr-88, the most abundant isotope of Sr, is used to produce the Sr-89 that is part of the cancer drug Metaston.a) Balance the nuclear equation showing the transformation of Sr-88 to Sr-89. Include a symbol, atomic number, and mass number for each reactant and product.+b) Sr-89 is a beta emitter. Write out the balanced nuclear equation illustrating Sr-89 beta emission. Include a symbol, atomic number, and mass number for each reactant and product.107) The iodine clock reaction is: IO3-(aq)+ 3 HSO3-(aq)--> I-(aq)+ 3 SO4-2(aq)+ 3H+The rate law for the reaction is experimentally determined to be rate = k[IO3-][HSO3-] where k = 6.3 (1/M s) and there is an activation energy of 19.7 kJ/mol.a) Fill all 9 boxes of the table with either "increases," "decreases," or "stays same"indicating how the rate, rate constant, and activation energy will change in response to the three changes in reaction conditions.(aq)
b) For each mechanism shown below circle the rate determining step that would make the mechanism match the experimentally determined rate law. Or cross out the mechanism if it cannot match the experimental rate law.c) Which mechanism has more intermediates? A B same number9
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230_F15_E4_p1Name:___________________________________
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1) An electrochemical cell was constructed as described in the cell line notation. Its potential ΔE was measured to be 0.575 V.a) Write out the balanced reduction half reaction. • • • 