The pH of a 500.00 mL buffer solution containing sodium mandelate and mandelic acid (ka= 3.89×10-4) (a,=0.90)

Q: The indicator ethyl red has Kₐ=3.8X10⁻⁶. Over what ap-proximate pH range does it change color?

A: Relation between pKa and Ka- Buffer capacity- The minimum amount of a strong acid or strong base…

Q: What masses of acetic acid and sodium acetate are needed to prepare 125 mL of pH=5.00 buffer if the…

A: Number of moles of solute to the  volume of solution in liter is known as molarity.

Q: What masses of dinmethylamine and dimethylammonium chloride do you need to prepare 6.00 L of pH =…

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Q: 4.Calculate the pH of the buffer prepared by mixing 2.00 g of NaOH with 80.0 mmol of salicylic acid…

A: Moles of NaOH = 2.0040=0.05 mol = 50 mmol…

Q: HCN] ka=4.0x10^-10    pka=10.32 An aqueous solution contains 0.447 M hydrocyanic acid. How many mL…

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Q: What would be the ideal buffer range for an acid if its Ka = 1.6 x 10-5?

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Q: Prepare 1.0 L of 0.2 M citrate buffer, pH 5.3. Assume the availability of crystalline citric acid…

A: Concept based on the buffer solutions

Q: What mass (g) of dipotassium phthalate must be added to 750 mL of 0.0500 M potassium acid phthalate…

A: dipotassium phthalate = K2P phthalate = P pH = 5.75 [H3O+] = antilog(-5.75) = 1.778 x 10-6…

Q: Calculate the pH of 0.391 L of a 0.25 M acetic acid - 0.27 M sodium acetate buffer before (pH1) and…

A: Given data,Molarity of acetic acid=0.25 MMolarity of sodium acetate=0.27 MVolume of buffer=0.391…

Q: 2.A solution prepared by dissolving 2.25 g HA (MW = 51.0) and 4.00 g of NaA in 500 mL of solution…

A: Weight of HA=2.25gm MW of HA =51.0 Weight of NaH=4.00gm Volume=500ml pH=6.02 Mw of NaA = MW of HA -…

Q: 10.5 mL of 0.10M HF (ka+6.3x10-4) is titrated with 5.7 mL of 0.10M NaOH. What is the pH of the…

A: Moles of HF = (10.5*0.1)/1000 = 0.00105  Moles of NaOH = (5.7*0.1)/1000 = 0.00057  NaOH and HF will…

Q: If 24.8 mL of 0.107 M acid with a pKa of 5.76 is titrated with 0.102 M NaOH solution, what is the pH…

A: pH = pKa + log [salt]/[acid] Number of moles = molarity x volume (L)

Q: A buffer is prepared using lactic acid (HLac) and sodium lactate (NaLac). 0.300 dm3 of the 0.500…

A: Since there are multiple questions, we will answer only the first question. If you require the…

Q: The following observations are made about a diprotic acidH2A: (i) A 0.10 M solution of H2A has pH =…

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Q: 2 Describe the basis of buffer action and indicator detection.

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Q: You prepare 250.0 mL of a buffer solution containing 0.550mol of acid and 0.450mol of its conjugate…

A: Buffer is the solution of mixture of weak acid/weak base with its salt of strong base/strong acid

Q: 3. On the laboratory shelf are 250MM solutions of both Acetic Acid and Sodium Hydroxide. How would…

A: pKa for acetic acid is 4.74

Q: How many grams of NaA (57.93 g/mol) would need to be added to 590 mL of 1.17 M HA to produce a…

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Q: What is the final pH of a buffer prepared by mixing 450 mL of 0.25 M Tris base with 130 mL of 0.50 M…

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Q: 2.Calculate the pH of the buffer prepared by mixing 2.00 g of NaOH with 7.50 g of disodium hydrogen…

A: pH is defined as the negative logarithm of hydrogen ion concentration present in the solution. The…

Q: What is the pH of  a buffer containing 395 mmoles of HCOOH (Ka = 1.8 x 10-4) and 380 mmoles of KHCOO…

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Q: Calculate the pH at the second stoichiometric point when 425 mL of 0.046 M solution of tartaric acid…

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Q: Many chemical reactions are carried out in the presence of buffers. Use the Henderson-Hasselbalch…

A: Range for the target pH of a buffer solution that would favor pH stabilization using Henderson…

Q: The concentration of total phosphorous (HPO4^2- and H2PO4^-) found in a blood sample is determined…

A: Henderson - hasselbach equation enables the calculation of pH of a buffer solution made by mixing…

Q: A solution is made by mixing 175 ml of 0.100 M formic acid ( ka = 1.7 x 10^-4 ) with 175 ml of 0.100…

A: Volume of formic acid = 175 mL  Molarity of formic acid = 0.100 M  Volume of sodium formate = 175 mL…

Q: The Ka of bromoacetic acid is 2.00 ×10–3.  What masses of bromoacetic acid (CH2BrCOOH) and sodium…

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Q: Describe how to prepare 1.0L of 0.10M acetate buffer of pH=4.00, from given 0.10M solutions of…

A: The volume of acetic acid and acetate to be mixed is calculated as, pH = pKa + log ([A-]/[HA]) [A-]…

Q: Find the mass of sodium formate that must be dissolved in 310.0 cm³ of a 0.80 M solution of formic…

A: A buffer solution is used to resist the change of pH caused by introducing strong acid or base to…

Q: A buffer solution is prepared by mixing 0.35 mol L1 solution of citric acid, C5H¬O5COOH, and 0.40…

A: Given: Concentration of citric acid (Assuming HA) = 0.35 M Concentration of sodium citrate (Assuming…

Q: What is the pH value of a buffer prepared by adding 10 mL of 0.1 M acetic acid to 20 mL of 0.1 M…

A: Given: Volume of acetic acid=10mL Molarity of acetic acid=0.1M Volume of sodium acetate=20mL…

Q: how many grams of sodium acetate trihydrate must be added to 50.0 ml of 0.250 M acetic acid to…

A: The pKa value is calculated as, pKa = - log Ka pKa = - log (1.8 x 10-5) pKa = 4.74 The moles of…

Q: An indicator (Ka = 1.7X106) is red but changes to blue when ionized. The indicator %3D was used in…

A: option (c) is correct. 5.32-7.32.

Q: 1. How would you prepare 500.0 mI. of 0.050 M phosphate buffer solution, pH 6.7 from 0.20 M…

A: Way to prepare buffer using PH measurement we have given 500ml of 0.05M buffer will have 0.025mol of…

Q: Question attached

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Q: A 25.00 mL solution of 0.0920 M HNO3 was titrated with 0.00, 15.00, 23.00, and 30.00 mL of 0.1000 M…

A: Molarity of HNO3 = 0.0920 M  Volume of HNO3 = 25.00 mL = 25.00 / 1000 L = 0.025 L Molarity of KOH =…

Q: How many grams of NaA (61.41 g/mol) would need to be added to 544 mL of 1.75 M HA to produce a…

A: Molarity of HA, [HA]=1.75 M  Volume of the solution, V = 544 mL=0.544 L pH of the solution=5.49 Ka…

Q: What is the pH of  a buffer containing 250 mmoles of HCOOH (Ka = 1.8 x 10-4) and 482 mmoles of KHCOO…

A: The reaction between the sodium hydroxide (NaOH) and formic acid (HCOOH) as shown below. In this…

Q: If the absorbance of one of the buffer solutions (pH = 4.604) was 0.314 and the absorbance of the…

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Q: Calculate the pH at the second stoichiometric point when 425 mL of 0.046 M solution of tartaric acid…

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Q: 2. A solution prepared by dissolving 2.25 g HA (MW = 51.0) and 4.00 g of NaA in 500 ml of solution…

A: Buffer solution :-      A buffer solution is one which resists changes in pH when small quantities…

Q: Chemistry 2. The pks of tye amino acid Arg are 1.82, 8.99, and 12.48. If Arg was used as a buffer,…

A: We have find out the ratio of conjugate base to weak acid in a pH of 7.00 Arg buffer.

Q: What mass of sodium glycolate (98.03 g/mol) must be added to 300.0 mL of 1.00 M glycolic acid…

A: Given: pH of the buffer = 4.00 Ka of glycolic acid = 4.48×10-4 Molarity of glycolic = 1.00 M Volume…

Q: The Ka of bromoacetic acid is 2.00 ×10–3. What masses of bromoacetic acid (CH2BrCOOH) and sodium…

A: The buffer reaction is - Given, the total concentration = 0.200 M pH of buffer = 2.100 Volume of…

Q: Calculate the ph of a buffer solution prepared by mixing 75ml of 1.0M lactic acid and 25ml of 1.0M…

A: Henderson's equation for calculating pH of a buffer consisting of a weak acid and slat of the same…

Q: Show how to prepare a 100-mL phosphate buffer solution (0.1 M, pH 7.0) using 14.8-M concentrated…

A: Given, Volume of buffer solution = 100mL = 0.2 L Molarity of buffer solution = 0.1M Molarity of…

Q: 4. A 100.0-mL solution consisting of 0.14 M NaC2H30z and 0.16 M HC2H302 was titrated with 24 mL of…

A: 4. Millimoles of KOH = M x V = 0.25 x 24 = 6 mmol Millimoles of HC2H3O2 = M x V = 0.16 x 100 = 16…

Q: What is the pH of a buffer prepared by adding 0.607 mol of the weak acid HA to 0.305 mol of NaA in…

A: Given: Moles of weak acid HA = 0.607 mol. Moles of conjugate base salt NaA of weak acid HA = 0.305…

Q: If 26.6 mL of 0.108 M acid with a pKa  4.65 is titrated with 0.101 M NaOH solution, what is the pH…

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Q: How much solid NaCH3CO2•3H2O must be added to 0.300 L of a 0.50-M acetic acid solution to give a…

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