1. What is the pH of a buffer that contains 1.100 M NH3 and 1.300 M NH4+? Ka= 5.70x10-10 What would be the new pH if a 100 mL portion of 0.075 M HCl is added to another 400 mL portion of the buffer?    2. If a multivitamin was manufactured on March 2021, when is its most likely expiration date? a. June 2021 b.December 2021 c. September 2021 d. March 2022

Q: Which of the following aqueous solutions are good buffer systems? O 0.14 M hypochlorous acid + 0.18…

A: Buffer solution is combination of weak acid or base with salt of weak acid or base respectively.

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Q: a. a D-al

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Q: Question 7 of 20 Submit What is the pH of a buffer made from 0.350 mol of HBRO (Ka = 2.5 x 10-º) and…

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Q: What is the pH of a 2.00 M NH3 solution? (Kb NH3 = 1.80x10^-5) 13.50 9.68 11.78 12.35 5.02 Music off

A: Given,  The pH of 2.00 M of NH3 solution is: Kb of NH3 = 1.80 × 10-5

Q: conjugate acid-base pairs.

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Q: For the reaction CH4(9) + H20(9)3H2(g) + CO(g) AH° = 206.1 kJ and AS° = 214.7 J/K The standard free…

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A: A question based on molecules that is to be accomplished.

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Q: Consider the equilibrium system described by the chemical reaction below. For this reaction, Kc =…

A: Given-> Kc = 2.1 × 103 H2 = F2 = 0.0021 M

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A: Given Ksp of SrC2O4(s) = 5.0*10-8  For H2C2O4, Ka1 = 5.60*10-2 , and Ka2 = 5.42*10-5 .

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Q: abel this diagram. Answer Bank E reactants transition state* products ΔΗ Reaction progress Which…

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Q: If 1.0 liter of 0.2 M acetic acid is treated with 4.0 g of NaOH, predict the resulting pH. Acetic…

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Q: A mixture of solid calcium oxide, CaO, and solid barium oxide, BaO, weighing 5.978 g is added to a…

A: Answer: In this question first of all we will calculate the moles CO2 consumed and then by the use…

Q: (OH)2​(aq)+2HCl(aq)CaCl2​(aq)+H2​O(l) An aqueous solution of Ca(OH)2with a concentration of 0.209 M…

A: Molarity of Ca(OH)2 = 0.209 M Volume of HCl = 25.00 ml Volume of Ca(OH)2= 15.93 ml

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Q: Which of the following statement(s) is/are true? (Select all that apply.) ASuniy = ASsys + ASsurr O…

A: The second law of thermodynamics predicts the spontaneous nature of a process. According to this…

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Q: Caleulate pre at cach of the points in the titration off 25.00 mL of 0.02206 M Fe by 0.0BS01 M EDTA…

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Q: Z-I Give an acceptable name for each amine. a. CH;CH,CHCH3 -N(CH3)2 C. NH2 H. b. CH3CH,CH,NHCH3 d.…

A: Note : As per our company guidelines we are supposed to answer only first 3 sub-parts. Kindly repost…

Q: ce AH°rxn for ΔΗ

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Q: Using the tabulated thermodynamic data, calculate the ΔGo for these reaction: d) Cl2(g) + 2 NO (g)…

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Q: Activity 5 More on Solubility, and LeChatelier's Principle (5a) What is the molar solubility of CaF2…

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A: Each of the given compounds, Ba(OH)2, CaCl2, and KCl are almost completely soluble in water.  A…

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Q: 6(a) Write the electronic hamiltonian for HeH,

A: Mc

Q: (a) Which is more likely to be paramagnetic, Fe(NO,)6 or Fe(OH)6 ? Fe(OH),+ O Fe(NO2)6* 4- (b) Why?…

A: Strong filed ligand occurs pairing...

Q: Arrange the following in order of increasing ionization energy. Ar Cl Li Na P

A: we need to arrange the elements in order of increasing ionization energy

Q: The solubility of copper (II) fluoride is 0.075 g/100 mL at 20ºC.  What is the solubility product…

A: Given: Solubility of copper (II) fluoride = 0.075 g/100 mL Molar mass of copper (II) fluoride =…

Q: %3D What is the pH of a 0.1000 M NACH3COO solution? (Ka CH3COOH = 1.8x10^-5) 4.75 5.13 8.87 7.45…

A: We have find out pH of 0.1000 MNaCH3COO Solution.

Q: A 22.3 mL sample of 0.344 M ethylamine, C2H5NH2, is titrated with 0.364 M perchloric acid. After…

A: Given,  Volume of C2H5NH2 = 22.3 mL  Molarity of C2H5NH2 = 0.344 M  Molarity of HClO4 = 0.364 M…

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A: Given,  Mass of water = Volume × density      = 369.7 × 1 = 369.7 g Heat capacity of metal(sm) =…

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Q: Part B If the normal physiological concentration of HCO3 is 24 mM, what is the pH of blood if Pco,…

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Q: The solubility product for silver (I) bromide is 7.7 × 10–13.  Calculate the molar solubility of…

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Q: The pH of an acidic solution is 6.75. What is pOH?

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Q: quantum numbers and orbital notation. Explain why these are impossible. a. n=4, =2, m²-3, m,=-½ b.…

A: ->n,l,ml,ms are quantum number then l =0 ( s orbital) l = 1 ( p-orbital ) l = 2 ( d-orbital)  l =…

Q: Which of the following anions will form a weakly basic solution?   magnesium   nitrate…

A: Correct option is E

Q: Below is one of the polypeptide chains in the insulin structure. a. What is the amino acid residue…

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