You wish to make a buffer of 500 mL at 0.1 M sodium phosphate at pH 6.5. If the molecular weight of NaH2PO4 and NazHPO4 are 121 g/mol and 143 g/mol, respectively, and the three pK, values or phosphoric acid are 2.14, 6.86, and 12.4, respectively, how many grams each of the two sodium phosphate salts must be dissolved to make 500 mL of a 0.1 M solution that buffers at pH 6.5?

Q: If a buffer is present at a pH of 4.8 and the buffer is then diluted, does the pH of the buffer…

A: If a buffer is present at a pH of 4.8 and the buffer is then diluted, the concentration changes. But…

Q: In a titration of 18.0 mL of a .250 M solution of a triprotic acid H3PO4 (phosphoric acid) with .800…

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Q: A student needs to prepare a buffer solution with a pH of 5.59. Assuming a pKa of 4.99, how many mL…

A: Answer:Buffer solution is a type of solution that resists the change in its pH on adding small…

Q: A student wishes to make a buffer that has a pH of 4.65.  The student has HNO2 and NaNO2.  Nitrous…

A: A buffer mixture is formed by the mixing of weak acid with its conjugate base or mixture of weak…

Q: You want to make a 100 mM buffer at pH 6.0 using succinic acid.  How many moles of [HA] and [A-] do…

A: Concentration of buffer solution= 100mM = 100 ×10-3 M  (1 mM = 10-3 M)  pH = 6.0

Q: Phosphoric acid is a triprotic acid with the p?apKa values p?a1=2.148,  p?a2=7.198, and…

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Q: Answer in scientific notation with appropriate sigfigs. A buffer solution is prepared by combining…

A: Given: An acidic buffer of acetic acid and sodium acetate is formed. Volume of acetic acid…

Q: A student needs to prepare a buffer solution with a pH of 5.83. Assuming a pKą of 4.76, how many mL…

A: Molarity - ratio of number of moles of solute to the volume of solution in litres. Formula is,

Q: True or False?   When choosing an acid to make a buffer, you should choose one whose pKa is closest…

A: When an acidic buffer is prepared , that buffer is best in which choosen acid has the pKa value…

Q: You want to prepare a buffer solution that has a pH equal to the pKa of the acid component of the…

A: The provided concentration of acid(HA)=0.10M Initial volume=100ml HA dissociate into HA ⇆ H+  + A-…

Q: What is the maximum amount of acid that can be added to a buffer made by mixing 0.35 moles of sodium…

A: A buffer is a solution which resists any change in pH on adding a small amount of acid or base.It is…

Q: How many mL of 0.461 M HCl are needed to dissolve 6.75 g of BaCO3?

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Q: Which of the following pairs will not form a buffer when mixed together in an aqueous solution?…

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Q: You have 75.0 mL of 0.17 M HA. After adding 30.0 mL of 0.10 M NaOH, the pH is 5.50. What is the Ka…

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Q: What is the hydroxide ion concentration in a solution that containing 0.30 mole of ephedrine and…

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Q: Which of the following systems will make a buffer solution? System A: NH4OH/NH4CI System B:…

A: Here we are required to find the solution which can form buffer.

Q: Can the combination of NH3 and (NH4)2SO4 form a buffer? Use appropriate reactions to explain why or…

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Q: Explain the role of buffers in maintaining the blood pH.

A: Given question is :  Explain the role of buffers in maintaining the blood pH = ?

Q: Provide a balanced chemical equation when a buffer solution with CH3COOH/CH3COO- combination would…

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Q: We need to prepare a 1 L of 0.25 M lactic acid buffer at pH 4.5 using lactic acid, sodium lactate…

A: Given,The molarity of lactic acid buffer solution =0.25 MVolume of buffer solution = 1 LpH of the…

Q: Describe how you would accurately prepare 100.0 mL of a buffer solution with pH 4.7 using 1.0 M…

A: GIVEN: Concentration of acetic acid = 1.0 M Concentration of NaOH = 1.0 M Volume of buffer solution…

Q: Write the carbonate buffer equation and explain how it works to buffer blood pH

A: A mixture of a weak acid and corresponding conjugate base or vice-versa results in the formation of…

Q: Cacodylic acid (dimethylarsinic acid, HASO2(CH3)2) is a common buffer used in biology to prepare and…

A:

Q: If the actual mass of a base used (sodium citrate dihydrate) in a buffer solution is 1.5 g, and the…

A: Given,  Actual mass of base (sodium citrate dihydrate) = 1.5 g  Concentration of the acid (ammonium…

Q: you are given 20 XSSC how much of 20 XSSC is required to make 25 mL of 0.5 XSSC buffer solutioN

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Q: Indicate whether each of the following solution combinations will make a buffer solution 50.0 mL of…

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Q: 4. The molar ratio between a weak acid and its base conjugate was (3:2). Calculate the Ka of the…

A: Hendrson hasselbalch equation will be use to determine Ka value

Q: What is the pOH of a buffer solution that contains 15.0mL of 0.010M H3PO4 and 15.0mL of 0.020M…

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Q: The following solution mixture which is/are buffer... Select one or more. Select 5 correct answer(s)…

A: The mixture of a weak acid and its salt can behave like a good acidic buffer. On the other hand, the…

Q: Calculate the pH of a buffered solution that is prepared by dissolving 0.3 mol of NaHCO3 and 0.45…

A: pH = pKa + log[salt]/[acid] Molar concentration = Number of moles of solute /volume of solution in L

Q: what is the mole ratio of ammonia to ammonium chloride in a buffer with a pH of 9.00?

A: The answer to the following question is-

Q: Calculate the pH of the buffer system made up of 0.15 M NH3/0.35 M NH4Cl.

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Q: How many mL of 0.0839 M NaOH are required to titrate 25 mL of 0.0890M HBr to the equivalence point?

A: At equivalence  point M1V1=M2V2

Q: Use Figure to find an indicator for these titrations:(a) 0.10 M HCl with 0.10 M NaOH(b) 0.10 M HCOOH…

A: HCl is a strong acid and NaOH is a strong base, so here the color change at end point will be…

Q: what is the balanced equation for NH4+ / NH3 buffer and what is the literature Ka value of it?

A: The buffer solution given is NH4+/NH3.