The K, of ammonia is 1.76 - 10-5 The pH of a buffer prepared by combining 50.0 mL of 1.00 M ammonia and 35.0 mL of 1.00 M ammonium nitrate is O 9.372 O 9.400 O 4.632 O 4.742 O none of the above O o o o O

Q: Calculate the pH of a buffer that is 0.22 M HC2H3O2 and 0.34 M NaC2H3O2. The Ka for HC2H3O2 is 1.8 x…

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Q: HEPES is considered a good buffer developed by a scientist of the same name it’s chemical properties…

A: The Henderson-Hasselbalch equation can be written as: pH=pKa +log[Conjugate base][Acid] The general…

Q: What is the [CH 3CO 2 ]/[CH 3CO 2H] ratio necessary to make a buffer solution with a pH of 5.04? K a…

A: Buffer solutions possess weak alkali+conjugate salt or weak acid+conjugate salt combination.…

Q: Which of the following pairs of chemical species, when combined in equimolar amounts, results in a…

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Q: A buffer is prepared using 10.00 mL of 3.00 M acetic acid and 20.00 mL of 1,50 M sodium acetate.…

A: We have to calculate the pH of the solution.

Q: A 1.00 L solution contains 19.52  g of nitrous acid, HNO2. What mass of sodium nitrite, NaNO2,…

A:

Q: A solution of 0.25 M potassium hydroxide, KOH is added from a burette to a flask containing 25.0 mL…

A: For given pH curve , incorrect statement is to be determined,

Q: Determine the pH of a buffer that is 0.95 M HBrO and 0.68 M KBrO. The value of pKa for HBrO is 8.68.…

A: Use acidic buffer's pH formula with the given data to find pH of the given solution.

Q: Which buffer system is the best choice to create a buffer with pH = 7.20? For the best system,…

A: Write the equation which is used to determine the pH of a buffer. Henderson Hasselbalch equation is…

Q: A buffer solution that is 0.317 M in CH,COOH and 0.317 M in CH3COONA has a pH of 4.74 . Addition of…

A: Explained as follows

Q: You want to make a 500.0 mL of 0.0500 M of phosphate buffer pH = 6.80 from solid Na2HPO4 compound…

A: The balanced chemical equation of formation of phosphate buffer can be shown as follows:

Q: A buffer solution that is 0.391 M in CH3COOH and 0.391 M in CH3 COOK has a pH of 4.74. Addition of…

A: As the concentration of acid, CH3COOH, is equal to the concentration of salt, CH3COO-K+, the pH of…

Q: The Kb of ammonia is 1.76 × 10-5. The pH of a buffer prepared by combining 45.0 mL of 0.180 M…

A: Molarity of NH3 = 0.180 M Volume of NH3 = 45 mL or 0.045 L Molarity of NH4NO3 = 0.205 M Volume of…

Q: A 100.0 mL buffer solution is constructed using 0.035 M HX, a weak acid, and 0.045 M NaX. Ka. HX =…

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Q: Calculate the pH of a buffer containing 0.32 M HC2H2O2 and 0.14 M KC2H2O2. The Ką of M HC2H2O2 at 25…

A: The pH of buffer can be calculated by using Handerson equation.  Buffer solution is the solution…

Q: Calculate the pH of the buffer that results from mixing 57.9 mL of a 0.278 M solution of HCHO2 and…

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Q: Which of the following acid/base pairs would be best for making a buffer with a pH of 3.50? H2CO3…

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Q: Calculate the number of grams of ammonium chloride that must be added to 2.00 L of a 0.500 M ammonia…

A: Given that pH = 9.2, pOH = 14 - 9.2 = 4.8 Also, pOH=-logOH-OH-=1.58×10-5 Now,  OH-=KbBaseSalt…

Q: What weight of sodium formate must be added to 400.0 mL of 1.00 M formic acid to produce a buffer…

A: Formic acid and sodium formate form buffer solution

Q: A student is trying to prepare a 100.0 mL buffer solution by using acetic acid/sodium acetate…

A: Answer: The effective pH range of acetate buffer varies from 3.74 to 5.74 for better results we will…

Q: A buffer solution that contains both NH3 and NH4 Calculate the ratio [NH4+]/[NH3] if the pH of the…

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Q: If [HSO4 ] = .7 M, what [SO42-] is needed to make a buffer of pH 2.2? 0.443 M 0.31 M O.217 M O 2.92…

A: According to your option, the exact answer is not matched. If we choose the option then the close…

Q: How many moles of NaOH need to be added to 200.0 mL of a 0.200 M solution of HF to make a buffer…

A: We have, The number of moles is calculated by using the following expression. So, No. of moles =…

Q: 9) a) Which of the following solutions would make a buffer? NaH,PO4/H3PO4 HCI/NaCl NH3/NHẠCI…

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Q: 20. Which of the following pairs of solutions can form a buffer? A. 1.0 M H,SO3 and 1.0 M Na2SO3 B.…

A: A buffer is a solution consisting of a mixture of weak acid and conjugate base, or vice versa.…

Q: Which of the following acid/base pairs would be best for making a buffer with a pH of 9.50? HCN and…

A: Buffer: The solutions which resist the change in pH on addition of Hydronium and Hydroxide ion is…

Q: Determine the pH of a buffer that is 0.95 M HBRO and 0.68 M KBRO. The value of pka for HBRO is 8.68.

A: Solution :       Dissociation is a process which shows separation of molecules into smaller ions.

Q: A buffer was prepared by mixing solutions of NaNO2 and HNO2. The addition of a small amount of NaOH…

A: Here HNO2 is a weak acid and NaNO2 is it's conjugate base When small amount of strong base (NaOH) is…

Q: If the pKa of HCHO, is 3.74 and the pH of an HCHO2/NaCHO2 solution is 3.94, which of the following…

A: Given,  pKa of HCHO2 = 3.74  pH of the buffer = 3.94  Weak acid = HCHO2  Conjugate base of HCHO2 =…

Q: A buffer is prepared using 0.15 M HF and 0.15 M NaF. What is the pH of this buffer? pKa for HF is…

A: Given :-   [HF] = 0.15 M  [NaF] = 0.15 M  pKa for HF = 3.1  To calculate :-  pH of buffer

Q: You need to prepare 2.21 L. of a HF/NaF buffer that has a pH of 3.95 and an osmotic pressure of 1.11…

A: Given that, Volume of the buffer=2.21L pH value of the buffer=3.95 Osmotic pressure of the…

Q: A buffer with pH of 4.74 is composed of 0.50mol sodium acetate and 0.60mol acetic acid is diluted to…

A: In this question, we will determine the moles of NaOH which is added to given buffer solution.  You…

Q: A buffer solution contains 0.301 M NaHCO3 and 0.394 M K2CO3. Determine the pH change when 0.085 mol…

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Q: We will be preparing a 50 mM phosphate buffer starting from Na2HPO4. When we say that the buffer is…

A:

Q: A 1.0-L buffer solution is 0.10 M in HF and 0.050 M in NaF. Which action destroys the buffer?(a)…

A: Given  concentration of HF = 0.10 M concentration of NaF = 0.050 M volume = 1.0 L  Calculate moles…

Q: If the pKa of HCHO2 is 3.74 and the pH of an HCHO2/NACHO2 solution is 4.15, which of the following…

A: Given: The pKa value is 3.74. The pH of HCHO2/NaCHO2 solution is 4.15.

Q: Determine the pH of a buffer that is 0.95 M HBrO and 0.68 M KBrO. The value of pKa for HBrO is 8.68.

A:

Q: 3. What is the pH of a buffer composed of 0.35 M H2PO, (aq) and 0.65 M HPO,?- (aq)? (K, of H2PO, is…

A: Given ,  Concentration of acid [H2PO4-] = 0.35M  Concentration of salt [HPO4-2] = 0.65M…

Q: Ka(HOAC) = 1.8 x 10-5. A 1-L buffer solution is prepared by mixing 0.35 mol HOAC and 0.45 mol NaOAc.…

A:

Q: In the titration of a solution of weak monoprotic acid with a 0.1375 M  solution of NaOH, the pH…

A: Given, Concentration of monoprotic acid = 0.1375 M pH at half way of equivalence point = 4.46

Q: Calculate the number of grams of ammonium chloride thatmust be added to 2.00 L of a 0.500 M ammonia…

A: Volume = 2.00 L Concentration of ammonia = 0.500 M pH of buffer = 9.20 Kb for ammonia = 1.80×10-5

Q: A student dissolves 0.0100 mol of an unknown weak base in 100.0 mL water and titrates the solution…

A: oles of  HNO3 added = 0.1*60/1000=0.006 moles of  wek base = 0.01  after neutralization, excess base…

Q: Consider a buffer made up of 0.10 M H2PO4 and 0.32 M HPO,?. The Ką of H2PO4 is 6.2x10%. What is the…

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Q: 1) One of the most common buffers used in biological applications is Tris H*/Tris: LOH HO но. OH HO.…

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Q: A chemist creates 0.375 L of a 0.18 M acetic acid (CH3COOH) and 0.29 M sodium acetate (CH3COONa)…

A: Answer:- This question is answered by using the simple concept of calculation of pH of a buffer…

Q: In the titration of a solution of weak monoprotic acid with a 0.1450 M solution of NaOH, the pH half…

A: Given   The concentration of NaOH solution is 0.1450 M. The value of pH is 4.38.

Q: A buffer solution with a pH of 4.40 is prepared with the same volumes of 0.29 M formic acid and M…

A: Given data is as follows:        The pH of the buffer solution = 4.40 The concentration of the…

Q: The pKa of HF is 3.14. What is the pH of a buffer composed of 0.1 M HF and 1M NaF? 4.14 O 13.13 O…

A: Given: The pKa of HF = 3.14  We have to calculate the pH of the buffer composed of 0.1 M HF and 1 M…

Q: What is the [H3O+] and the pH of a buffer that consists of 0.52 M HNO2 and 0.87 M KNO2? (Ka of HNO2…

A: Given buffer is an acid buffer prepared by mixing weak acid HNO2 and the salt KNO2 Also given that ,…

Q: A buffer solution contains 0.89 mol of phenol (HC6H5O) and 0.86 mol of sodium phenoxide (NaC6H5O) in…

A: The classification of buffers is based on the pH value. When pH comes in 0-7 range, it is named as…

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.