2. Consider the list of acids and their pKa values to the right. What two compounds would be best to use in preparing a pH 9.0 buffer solution? Justify your answer. Assume you have the acids and the a. sodium salts of their conjugate bases available to you. b. What mass ratio of sodium salt to acid is needed to prepare this buffer? c. Can this buffer solution better resist pH changes from a strong acid addition or strong base addition? Justify your answer. pка Acid pK. = НС-Н,0, 4.76 HС-Н,О, 4.20 HCIO, 1.92 НСНО, 3.74 HCN 9.40 acetic benzoic chlorous formic hydrocyanic hydrofluoric hypochlorous monochloroacetic HC,H,CIO, 2.87 HF 3.17 НОСІ 7.53 HNO, 3.29 носсH, 9.80 nitrous phenol

Q: Using standard reduction potentials from the ALEKS Data tab, calculate the standard reaction free…

A: As data given to me as reference is not clear so i took reference from standard  book.

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A: The number of Ra atoms is calculated as, The number of Ra atoms is .

Q: Product isoto prs after nuclear de cay Fill up by di fferent K-deca y 92 B-deay Eleckon Caplave…

A: Nuclear reaction: A nuclear reaction must cause a transformation of at least one nuclide to another.…

Q: A0.43 Mof a solution of week acid is 3.0 % dissociated. The PKa value of the acid is: (Write your…

A: No. of moles of H+ = 0.43 - 0.43×3100= 0.4171

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A: To calculate the age of the mineral, we can use the concept of radiometric dating. The ratio of 87Rb…

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Q: What type of radiation detector would you recommend for the following: (a) 131I in aqueous solution…

A: For the detection of specific types of radiation, different types of radiation detectors are used.

Q: 3 How manygrams of Na2CO3 (FM 105.99) should be mix h 5.00 g of NaHCO3 (FM 84.01) to produce 100 mL…

A: Ka or acid dissociation constant: In an aqueous solvent, When an acid reacts with the solvent…

Q: (c) If T, = 1x10-7 s, T2 = 4x10-8 s, and T3 = 1x10-8 s, calculate the lifetime of the singlet state…

A: Given: Γ1 = 1 x 10-7  sΓ2 = 4 x 10-8 sΓ3 = 1 x 10-8 s To Calculate: Lifetime of singlet state and…

Q: 28. In the titration of 375 mL of 0.400 M HNO₂ (K = 5.6 x 10-4) with 0.250 M NaOH, calculate the pH…

A:

Q: please calculate Pka value

A:

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A: Radiometric dating is used to determine the age of rocks.

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A: Given data contains, Grams of ammonia is 3.4 grams. The formula of ammonia is NH3. The atomic mass…

Q: 2) wnte a nuclear tquahon for the production of 153EU by bombardment of 148 La with 12C

A: Write nuclear reaction of La with C to produce Eu ?

Q: HCECH + HO HCEC + H,0

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A:

Q: All of the following are extended coverage perils under an HO-2, EXCEPT:    A: Burglar damage.

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A:

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A: The answer is attached-:

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A: To calculate the Q-factor of the following decay process Kr77   ⟶   Br77+ e+ + νe

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A:

Q: 3. 24Na is produced through the reaction 26Mg(d,a)4Na. A 0.2 mm thick magnesium foil is irradiated…

A:

Q: Consider the nuclei  11750Sn. Determine its mass defect in kilograms if its atomic mass is 116.928…

A:

Q: Show that the neutron number for the following nuclides generally exceeds the atomic number for…

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A: This is an example of alpha decay since an alpha particle is emitted.

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A: Asking the stability order

Q: Radial probability Penetration Distance from the nucleus

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A:

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A: The given data for 11C are:Atomic Mass of 11C = 1.82850 x 10-26 kgSpeed of Light = 299,792,458 m/s…

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A: So will define  Ka. And pKa and the relationship between these values? How are they similar and how…

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A:

Q: 27 Te value of Ag 9ts ecnstituent element Pzcg) +3C/2cg)→2Pcl3(9) is A)-SB9.2 B) t539.2 C)-373.3…

A:

Q: The nuclear radii of aluminum and gold are approximately r = 3.6 fm and 7.0 fm, respectively. The…

A: The energy can be calculated using the formula, E=-14π∈0q1q2r The energy needed for an alpha…

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Q: 222 39 98 s6 Rn Ca "Tc 20 43-

A:

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A: B. Magnetism travelled through paper clip 1 to paper clip 2 and made them magnetic.

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A:

Mass Spectrometry

This process is an instrumental method in which a sample is changed to fast moving positive ions by electron bombardment. The charged particles vary due to their different mass to charge ratio and are estimated with the help of this difference. It is also called mass spectroscopy.