Suppose you wanted to make a buffer of exactly pHpH 7.00 using KH2PO4KH2PO4 and Na2HPO4Na2HPO4. If the final solution was 0.18 MM in KH2PO4KH2PO4, what concentration of Na2HPO4Na2HPO4 would you need? (pKapKa for H3PO4H3PO4, H2PO4−H2PO4−, and HPO2−4HPO42− are 2.14, 6.86, and 12.40, respectively.)

Q: Calculate the mass (in g) of sodium benzoate (NaC7HsO2) that would obtain a buffer with a pH of 4.30…

A: Henderson Hasselbalch equation for buffers: pH = pKa + log [salt]/[acid] Here acid is benzoic acid…

Q: What is the hydronium ion concentration in a buffer solution prepared by mixing 50.00 mL of 0.10 M…

A: The solution is as follows :

Q: Calculate how much you need to take from each solution to prepare 1 L of buffer solution with a pH…

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Q: What ratio of CH3NH2 to CH3NH3t is needed to prepare a pH 9.80 buffer? (Kb for CH3NH₂ is 4.4 × 10-4)

A: pH= 9.80  Kb= 4.4×10-4  Pkb= -logKb = -log(4.4×10-4)= 3.356  pH+pOH= 14  POH= 14-PH  POH= 14-9.80 =…

Q: A student needs to prepare a buffer solution with a pH of 5.73. Assuming a pKa of 4.06, how many mL…

A: Given,Molarity of NaOH = 0.1 MMolarity of acid ( HB ) = 0.1 Mvolume of HB = 15.0 mLpH of the buffer…

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

A: The question is based on the concept of the pH of the solution.It is defined as a negative logarithm…

Q: A lactic acid/sodium lactate (HC3H5O3/NAC3H5O3) buffer is prepared to 0.104 mol L-1 HC3H5O3 and…

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Q: Be sure to answer all parts.   What is the [H3O+] and the pH of a buffer that consists of 0.45 M…

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Q: Which of the following combinations would be the best to buffer the pH of a solution at…

A: To determine the best buffer, we have to find the pKa. pKa gives us the ideal of working range of…

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: Acetic acid has a Ka of 1.8×10−5. a.) What is the pH of a buffer solution containing 0.20 M HC2H3O2…

A: Concentration of acetic acid[C2H3O2] = 0.20 MConcentration of acetate ion = 0.13 MKa = 1.8*10-5pH =…

Q: A buffer solution is prepared by dissolving 0.200 mol of NaH2PO4 and 0.100 mol of NaOH in enough…

A: pH is used to determine the concentration of hydronium ion.

Q: Calculate the pH of buffer system with 0.25 M C6H5NH3 and 0.31 M C6H5NH3+.Ka of anilinium ion = 2.5…

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Q: Calculate how much of each solution you need to take to prepare 1 L of buffer solution with a pH…

A: Buffer solutions are the solution which resist change in pH when small amount of acid or base is…

Q: Vitamic C, aka ascorbic acid (H₂C₆H₆O₆) is a weak diprotic acid. Which of the following aqueous…

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Q: What is the pH of the buffer that occurs when 7.00 Mol of H2SO4 and 4.0 Mol of NaOH are diluted with…

A: A buffer solution generally consists of a weak acid and its salt. Buffer solution resists the change…

Q: What will be the pH of the solution prepared by dissolving 8.35 g of aniline hydrochloride (C6H5NH3…

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Q: Which of the following combination can be used to prepare a buffer with a pH of 3?     NaH2PO4 and…

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Q: What are the components of the buffer solution when 0.20 mol H3PO4 is mixed with 0.30 mol of the…

A: Given statement is :  What are the components of the buffer solution when 0.20 mole H3PO4 is mixed…

Q: A buffer solution is made that is 0.319 M in HCN and 0.319 M in NaCN. (1) If Ka for HCN is…

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Q: A buffer is composed of 0.200 M HC2H3O2 (Ka = 1.8 × 10–5) and 0.250 M NaC2H3O2. What is the pH of…

A: Molarity of HC2H3O2 = 0.200 M Molarity of NaC2H3O2 = 0.250 M Ka of HC2H3O2 = 1.8 × 10-5 Moles of KOH…

Q: In Part C of Lab 8, you will prepare a phosphate buffer of a certain pH using the direct method. The…

A: The objective of this question is to determine the amount of a second phosphate compound needed to…

Q: Formic acid, HFor, has a Ka value of 1.8 x 10^-4. You need to prepare a buffer having a pH of 3.25…

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Q: What is the pH of buffer prepared by mixing 250 mL of 0.2 M benzoic acid and 100 mL of 0.25 M sodium…

A: PH of buffer solution is calculated by using Henderson Hassel balch equation

Q: For 490.0 mL of a buffer solution that is 0.185 M in CH3CH₂NH₂ and 0.135 Min CH3CH₂NH3C1, calculate…

A: This is an basic buffer solution with amonium ion salt and amonia base

Q: Which of the following is the most effective buffer system for a pH value of 5.50? (a)…

A: (a) HC3H5O2/C3H5O2- Ka = 1.34x10-5(b) HC2O4−/C2O42- Ka = 5.42x10-5(c) HNO2/NO2- Ka = 7.10x10-4(d)…

Q: A student is preparing a buffer at a pH of 8.60. She has these chemicals in the lab: HCl, KOH,…

A: For preparing a buffer solution of pH range 8.60; it needs to be the nearest pka value.So, search…

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

A:

Q: how many mLs of 0.125 M Ba(OH)2 would be required to completely nuetralize 75.0 mL of 0.845 M HCI?…

A: Given  Molarity of Ba(OH)2  = 0.125 M                                    = 0.125 mol/L  Volume of…

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

A: Since you have posted multiple questions, we are entitled to answer the first only.

Q: What is the pHpH of a buffer solution containing 0.20 MM HC2H3O2HC2H3O2 (acetic acid) and 0.20 MM…

A: Given :-  [HC2H3O2] = 0.20 M  [C2H3O2-] = 0.20 M  Ka for acetic acid = 1.8 x 10-5  To calculate :-…

Q: Which of the following pairs would pe appropriate to make a buffer of pH 3.0? O H2SO3 and NaHSO3 O…

A: If a weak acid pKa lie between the buffer zone then weak acid and it's salt act as a good buffer.…

Q: How would you prepare 10.0ml of a buffer with a concentration of 0.0100 mol/L, and pH 7.40, starting…

A: Given: pH of buffer = 7.40  Concentration of buffer = 0.0100 M Volume of buffer required = 10.0 mL =…

Q: You have 150 mL of 1 M ammonia solution (pKa=9.25). What volume of 1 M hydrochloric acid is needed…

A: pKa=9.25-log(Ka)=9.25Ka=5.62×10-10pH=-logH+=9.5H+=3.16×10-10

Q: What ratio of CH₃NH₂ to CH₃NH₃⁺ is needed to prepare a pH 10.10 buffer? (Kb for CH₃NH₂ is 4.4 ×…

A: Given :-  pH of buffer = 10.10/ Kb for CH₃NH₂ = 4.4 × 10⁻⁴  To calculate :-  ratio of CH₃NH₂ to…

Q: In a titration of 73.0 mL of a 0.500 M solution of a diprotic acid HC,H,O, (malonic acid) with 0.255…

A: Given -> Molarity of malonic acid = 0.500 M = M1 Volume of malonic acid = 73.0 ml = V1 Molarity…

Q: what is the (HSO4)-, (SO4)2- and ph of a buffer solution which is composed of 50mL of 0.25M NaHSO4…

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

Q: What is the [H3O+] and the pH of a buffer that consists of 0.29 M HNO2 and 0.77 M KNO2? (Ka of HNO2…

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Q: You need to prepare 100.0 mL of a pH 4.00 buffer solution using 0.100 M benzoic acid (pK, = 4.20)…

A: Given,  Volume of the buffer solution = 100.0 mL  pH = 4.00  [Benzoic acid] = 0.100 M  [Sodium…

Acid Base Titration

An acid-base titration is the method of quantitative analysis for determining the concentration of an acid and base by exactly neutralizing it with a standard solution of base or acid having known concentration.