To simulate the pH=7.40 of blood, an undergraduate researcher in a biology lab produced a buffer solution by dissolving sodium dihydrogenphosphate and sodium hydrogenphosphate together in an aqueous solution. [Equilibrium constants: Ka1=7.5x103, Ka2=6.2x10-8, What mole ratio of Na2HPO4/NaH2PO4 was required? Ka3=3.6x10-13]. O 1.5 1.2 0.90 1.0

Q: A student needs to make a buffer solution, so he prepares a 0.200 M solution of benzoic acid,…

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Q: A buffer is created by dissolving 0.303 moles of lactic acid and 0.197 moles of sodium lactate in…

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Q: Calculate the pH of a buffer that is 0.250 M in NaHCO3 and 0.280 M in Na2CO3.

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Q: To simulate the pH of blood, which is 7.4, a buffer solution made by dissolving sodium dihydrogen…

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Q: buffer of pH = 7.5 is desired. Which two of the following compounds should be dissolved in water in…

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

Q: In general, which of the following will have the largest value? A. Equilbrium constant for the…

A: Ksp of an insoluble salt has largest equilibrium constant .

Q: A buffer solution is prepared in which the concentration of NH3 is 0.20 M and the concentration of…

A: Given : buffer solution of weak acid NH4+ and its conjugate base NH3  concentration of NH3 = 0.20 M…

Q: Acetate buffers are used in biochemical studies of enzymes and other chemical components of cells to…

A: Given values concentration of acetic acid = 0.10 M Concentration of sodium acetate = 0.10 M Acid…

Q: Define buffering capacity. How do the followingbuffers differ in buffering capacity? How do they…

A: Value of pH is used to determine whether the solution is acidic or basic in nature. At room…

Q: 8. What is the pH in the preceding problem if the mixture consists of 0.1 M acetic acid and 0.25 M…

A: The acidity of a solution is expressed in pH scale and is furnished in terms of hydrogen ion…

Q: What is the pH of a buffer that results when 5.46 mole of H3PO4 is mixed with 2.97 mole of NaOH and…

A: · Moles of H3PO4 = 5.46 mol· Moles NaOH = 2.97 mol· Volume of solution = 1.00 L· Ka1 = 7.5 × 10–3

Q: pka = 1.95 (HClO2) If you have 500 mL of a 0.10 M solution of the acid, what mass of the…

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

Q: What is the pH of a buffer solution that is 0.251 mol L in lactic acid and 0.151 mol L in sodium…

A: Given: Concentration of Lactic Acid= 0.251 mol L-1 Concentraion of Sodium Lactate= 0.151 mol L-1 Ka=…

Q: The concentration of Mg 2+ in seawater is 0.052 M. At what pH will 99% of the Mg 2+ be precipitated…

A: We have 0.052 M of Mg+2 , we have to predict the pH at which 99% of Mg+2 will be precipitated .

Q: Calculate the pH of a buffer that is 0.130 M in NaHCO3 and 0.335 M in Na2CO3.

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

Q: A buffer consists of 0.25 M KHCO3 and 0.21 M K2CO3. Given that the K values for H2CO3 are, Ka1 = 4.5…

A: Given, 0.25 M KHCO3 0.21 M K2CO3 Ka1 = 4.5 x 10-7 and Ka2 = 4.7 x 10-11

Q: A buffer solution is prepared by taking 0.25 moles of acetic acid (pKa = 4.76) and 0.400 moles of…

A: Given: Moles of acetic acid = 0.25 mol Moles of barium acetate = 0.400 mol Volume of solution =…

Q: A buffer solution is prepared by taking 0.400 moles of acetic acid (pKa = 4.76) and 0.250 moles of…

A: The Henderson Hasselbalch equation for acidic buffer solution is given as :

Q: What is the pH of a buffer solution that contains 0.25 M HClO and 0.35 M NaClO? (pKa HClO = 7.46)…

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Q: In an experiment on evaluation of antacid containing magnesium carbonate, a tablet weighing 2.50 g…

A: Given, mass of tablet = 2.50 g            molarity of HCl = 1.00 M            volume of HCl = 5.00…

Q: What is the pH of a buffer solution that is 0.159 M in hypochlorous acid (HCIO) and 0.121 M in…

A: Given: Concentration of hypochlorous acid (HCIO)=0.159 M Concentration of  sodium hypochlorite…

Q: Calculate the pH of a buffer solution obtained by dissolving 0.1 moles of pyridine (C5H5N) and 0.2…

A: Number of moles of pyridine = 0.1 moles Number of moles of pyridinium chloride = 0.2 moles

Q: Consider a buffer solution that contains 0.45 M H3PO4 and 0.55 M NaH2PO4. For H3PO4, Ka1 = 6.9E-3,…

A: The given buffer solution has 0.45 M H3PO4 as the weak acid and  0.55 M NaH2PO4 as the conjugate…

Q: A buffer consists of 0.21 M H3PO4 and 0.38 M NaH2PO4. Given that the K values for H3PO4 are, Ka1 =…

A: Given that, a buffer is made by 0.21 M of H3PO4 and 0.38 M of NaH2PO4. The dissociation constant…

Q: How many grams of sodium acetate (82.03 g/mol) must be added to 1.00 L of 0.50 M solution of acetic…

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Q: 2. There is a phosphate buffer with 0.1 M of NaH₂PO4 0.1 M of Na₂HPO4. Calculate pH of buffer…

A: A buffer solution is a combination of two solutions - a weak acid solution and the salt of its…

Q: If we mix 17.1mL of 0.100M Lil, 20.7mL of 0.100M Cal2 and 27.3mL of 0.100M Li2SO4, what will be the…

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Q: A buffer solution is made that is 0.399 M in H2CO3 and 0.399 M in NaHCO3. If Ka1 for H2CO3 is 4.20 x…

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Q: A buffer is prepared by mixing 0.15 M NazHPO4 and 0.10 M NaH, PO4. K, for H3PO4 = 7.5 103 %3D Ka for…

A: The PH of buffer can be calculated as

Q: 11) Choose the acid below that would make the most effective buffer for a solution to maintain a pH…

A: The solution is given below -

Q: Which of the following acids (listed with Ka values) and their conjugate base would form a buffer…

A: We have to identify which of the below given acids and their conjugate base would form a buffer with…

Q: Magnesium hydroxide, Mg(OH). has a K of approximately 5.61x10-12 Part A Calculate the molar…

A: Given that:  Ksp of Mg(OH)2 = 5.61×10-12 pH = 8.57 pH + pOH = 14 pOH = 14- pH = 14 - 8.57 = 5.43…

Q: Estimate the calcium concentration (in ppm by mass) in a groundwater sample, which has a pH of 5.63.…

A: Given: pH = 5.63 Partial pressure of CO2 = 0.185 atm Henry's law constant of CO2 at 298 K = 1648.162…

Q: Calculate the pH of a buffer solution prepared by dissolving 0.400 mol of cyanic acid (HCNO) and…

A: Given  Number of mole of HCNO Acid      = 0.400 mole  Number of mole of sodium cyanate   Salt  =…

Q: A buffer solution is 0.100 M in both HC7H5O2 and LIC7H5O2 and has a pH of 4.19. Which of the…

A: The buffer solution is that can resist the small change in PH  by the addition of acid or base.

Q: A 0.0250 M Ca(X)2 has a pH of 8.049. Ca(X)2 is composed of a Ca2+ cation and an unknown anion X-,…

A: Given,  Molarity of Ca(X)2 = 0.0250 M. and it has pH = 8.049. The Kb or Kh of X- is:

Q: write the formula for the salt formed by mixing Pb2+(aq) and OH- ions as PbOH or PbOH2. Explain why…

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Q: )A solution made by dissolving 7.40 g of potassium hypochlorite (KClO) into 1.50 L of solution.…

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Q: Since soap and detergent action is hindered by hard water, laundry formulations usually include…

A: Given, the concentration of CaCO3 = 75 ppm means that 75 mg of CaCO3 is present in 1 L of hard…

Q: buffer solution can be prepared by mixing 0.02 M NH3 with 0.03 M NH4Cl (Ka = 5.70 x 10^(-10)).…

A: The solution's pH value affects whether the solution is acidic or basic. If the pH value is more…

Q: 0.0158 M LiClO and 0.099 M HClO in 2.5 L.  The ka of HClO = 2.9e-8.

A: Given data are as follows: LiClO concentration=0.0158 M  HClO concentration=0.099 M ka of HClO =…

Q: Acetic acid (pKa = 4.75) is contained in vinegar.  1. Calculate the pH of an 0.1500 M aqueous…

A: As per our guidelines, we can only solve one question at a time. Please post other questions as next…

Q: BUFFERS, HYDROLYSIS OF SALTS 1. A 0.0250 M Ca(X)2 has a pH of 8.049. Ca(X)2 is composed of a Ca2+…

A: We are authorised to solve only first three subparts of a question. Please post rest of the subparts…

Q: 1. A 0.0250 M Ca(X)₂ has a pH of 8.049. Ca(X)₂ is composed of a Ca²+ cation and an unknown anion X,…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: 5. What volume of 1.50 M NaOH must be added to 200.0 mL of 1.00 M glycolic acid (HC2H3O3) to produce…

A: Given : Concentration of NaOH = 1.50 M Concentration of glycolic acid = 1.00 M Volume of glycolic…

Q: A buffer solution is prepared by taking 0.250 moles of acetic acid (pKa = 4.76) and 0.400 moles of…

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Q: Calculate the pH of a buffer that is 0.225 M HC2H3O2 and 0.162 M KC2H3O2. The Ka for HC2H302 is 1.8…

A: Given: Concentration of HC2H3O2 = 0.225 M Concentration of KC2H3O2 = 0.162 M Ka for HC2H3O2 =…

Q: Write the balanced equation when 1 drop of NH4OH, 20 drops of distilled water, 6M of HCI is added…

A: Note - The given data in parts, i.e, a. Co(COH)3, b. Al(OH)3, and so on, has no relevance in the…

Q: A buffer solution is prepared by taking 0.250 moles of acetic acid (pKa = 4.76) and 0.400 moles of…

A: From the Henderson-Hasselbalch equation:

Q: Phosphoric acid is a triprotic acid (Kal = 6.9 x 10-3, K2 = 6.2 x 10-8, and Ka3 = 4.8 x 10-13). To…

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