pH indicator. A dye that is an acid and that appears as different colors in its protonated and deprotonated forms can be used as a pHPH indicator. Suppose that you have a 0.001 M0.001 M solution of a dye with a pKapka of 7.2. From the color, the concentration of the protonated form is found to be 0.0002 M0.0002 M, Assume that the remainder of the dye is in the deprotonated form. What is the PHPH of the solution?

Q: Find the pH of a buffer solution that is 0.600 M HC2H3O2 (aq) solution and 0.700 M Na C2H3O2 (aq) @…

A: Buffer solution: The buffer solution is an aqueous solution consisting of a mixture of a weak acid…

Q: Consider how best to prepare one liter of a buffer solution with pH = 6.52 using one of the weak…

A: Given: The pH of the buffer solution is 6.52. The volume of the buffer solution is 1.00 L.

Q: 12. Assuming equal concentrations of conjugate base and acid, which of the following mixtures is…

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Q: What is the pH of a buffered system made by dissolving 17.42 g of KH2PO4 (MM 136.1 g/mol) and 20.41…

A: Given : Mass of KH2PO4 = 17.42 g Mass of K2HPO4 = 20.41 g And Ka of KH2PO4 = 6.2 X 10-8  Molar mass…

Q: Given aqueous solutions of 0.1 M weak acetic acid (CH3COOH, pKa=4.72) and 0.1 M sodium acetate…

A: Consider the volume of acetic acid in the final solution be x L and the volume of sodium acetate in…

Q: cion 6 A 500.mL buffer solution is prepared by mixing 50. mL of 0.650 M NaOH and 45 mL 0.500 M…

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Q: A solution is made by mixing 0.400M in formic acid, HCOOH, and 1.00M in sodium formate, HCOONa?…

A: Given: Concentration of HCOOH = 0.400 M Concentration of HCOONa = 1.00 M Volume of solution = 1.00 L…

Q: You want to make a 500.0 mL of 0.080 M of phosphate buffer pH = 7.90 from Na2HPO4 and NaH2PO4…

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Q: The indicator methyl red has a pKHIn = 4.95. It changes from red to yellow over the pH range from…

A: Given-  pKHIn of indicator = 4.95            Colour of indicator at pH=4.4 - red           Colour of…

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: a. Use the Ka values provided to chose a weak acid that can effectively buffer a solution at a pH of…

A: Given data,

Q: 1. A buffer solution is prepared by taking 0.25 moles of acetic acid (pKa = 4.76) and 0.400 moles of…

A: 1. Given,

Q: An analytical chemist Is titrating 150.5 mL of a 0.1400M solution of aniline (CH,NH,) with a 0.4000M…

A:

Q: An analytical chemist is titrating 134.4mL of a 0.6500M solution of nitrous acid HNO2 with a 0.7300M…

A: The molarity of an unknown solution can be determined by titrating it with a known solution by using…

Q: A chemistry graduate student is given 450. mL of a 0.90 M nitrous acid (HNO₂) solution. Nitrous acid…

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Q: A buffer is to be prepared from acetic acid (CH3COOH) and sodium acetate (NACH3COO). What ratio of…

A: Correct answer is 100 : 1. pka = -log ka = -log ( 1.82 x 10-5 ) = 5 - 0.26 = 4.74 Henderson equation…

Q: From the list of acid-base indicators below, select the one BEST indicator for a titration with an…

A: The indicators are chemical compounds that show changes in color at a definite change in pH. Hence,…

Q: 75.0 mL of a 0.040 M aqueous solution of ammonia (NH3) is titrated with a 1.00 M solution of nitric…

A: Volume of aqueous solution of ammonia=75.0mL Concentration of ammonia=0.040M Concentration of nitric…

Q: 2. In the pH metric titration of strong and weak acid mixture against strong alkali, generally first…

A: We are given a mixture of strong acid(H+) and weak acid(HA).  We titrate the above mixture with a…

Q: An analytical chemist is titrating 160.2 mL of a 0.3300M solution of nitrous acid (HNO,) with a…

A: Given: The reaction is as follows: HNO2(g) + KOH(l)   ⇌  KNO2(aq) + H2O.  The volume of HNO2, (V1) =…

Q: KOH is used to titrate an acid to the equivalence point. The indicator thymolphthalein was chosen as…

A: The chemical indicator is any substance which gives visible sign, usually by colour change, of the…

Q: A 1 litre solution is made by adding 0.6646 moles NaH2PO4 and 0.8868 moles Na2HPO4. What will be the…

A: Here by mixing NaH2PO4 and Na2HPO4 we are making Buffer solution Basically buffer solution is a type…

Q: Prepare 100 mLof a 0.01 M phosphate buffer, pH 7.70, from stock solutions of 0.1 M K2HPO4and 0.2 M…

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Q: For a hypothetical buffer prepared from acid-conjugate base components with pKa of its acid…

A: Given,  pKa of the unknown acid = 4.56  Which pH range would it be expectedly most effective = ?…

Q: A chemistry graduate student is given 450. mL of a 1.40 M nitrous acid (HNO, solution. Nitrous acid…

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Q: Calculate the pH of 0.10 M Zn(NO3)2, which dissolves to give 0.10 M Zn21 (pKa 5 9.0) and 0.20 M NO23

A: The reaction is:           Zn(NO3)2 + H2O →[ Zn(H2O)6]2+ + 2 NO3- Initial   0.1 M…

Q: Indicator pH range Methyl orange 3.1 - 4.4 Methyl red 4.4 - 6.2 Bromthymol blue 6.2 – 7.6…

A: Interpretation -  To explain that which pH indictor would be best for the titration of acetic acid…

Q: A buffer solution is prepared from equal volumes of 0.200 M acetic acid and 0.600 M sodium acetate.…

A: Given: Concentration of acetic acid i.e. CH3COOH = 0.200 M Concentration of sodium acetate i.e.…

Q: you add 1.00 mL of 1.00 M HCl to 100.0 mL of buffer solution that is 0.100 M acetic acid and 0.100 M…

A: Given-> Volume of HCl = 1.00 ml Molarity of HCl = 1.00 M Volume of buffer = 100.0 ml Molarity of…

Q: An analytical chemist is titrating 102.2 mL of a 0.5200M solution of nitrous acid (HNO,) with a…

A: For HNO2 Volume, V =102.2 mL = 0.1022 L Molarity, M = 0.5200 M = 0.5200 mol L-1   For KOH Volume, V…

Q: 1.34 L buffer solution consists of 0.128 M butanoic acid and 0.289 M sodium butanoate. Calculate the…

A: When a strong base is added to the buffer solution, then it reacts with the weak acid of the buffer…

Q: You have 500.0 mL of a buffer solution containing 0.250 M acetic acid (CH₃COOH) and 0.240 M sodium…

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Q: What volume in mL of 0.2572 M NaOH must be added to 500.0 mL of 0.1000 M chlorous acid (HClO2, Ka =…

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Q: Methyl red has a pKa of 5.0 and is red in its acid form and yellow in its basic form. If several…

A: Methyl red is an indicator. In acidic medium, it turns into red colour and in basic medium it turns…

Q: Calculate the pH of a buffer solution prepared by dissolving 0.20 mole of cyanic acid (HCNO) and…

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Q: ACID-BASE EQUILIBRIA Doc Jill wants to determine the Ao of a weak acid she isolated called…

A: Answer: When a weak acid is added into the water, its partial ionization takes place which causes…

Q: An aqueous buffer solution of volume 100 cm3 consists of 0.20 M CH3COOH and 0.20 M NaCH3CO2.…

A: a) Calculation of pH of the solution: Thus pH of the solution in 3 significant figures is 4.75

Q: You make a 200mM potassium phosphate buffer (pKa of 7.20) with monobasic potassium phosphate…

A: Given: Concentration of solutes = 200 mM = 0.200 M                                (Since 1 M = 1000…

Q: A chemist titrates 100.0 mL of a 0.0714M nitrous acid (HNO,) solution with 0.3683M KOH solution at…

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Q: Consider how best to prepare one liter of a buffer solution with pH = 6.52 using one of the weak…

A:

Q: Consider exactly one litre of a hydrofluoric acid buffer solution, containing 0.800 M HF and 0.528 M…

A: Buffer solution are those which resist a change in their pH upon addition  of an acid or a base or…

Q: pka of Hypobromous acid is 8.60 What must be the minimum concentration of hypobromous acid in 1.00L…

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Q: Calculate the concentrations of the weak acid and conjugate base for the best possible buffer at pH…

A: The best buffer is the formic acid/formate buffer system because it has a pH under 3.75 other…

Q: For the buffer solution of weak acid HA and its conjugate base salt NaA, [HA] and [A] are expressed…

A: We are given a buffer solution of a weak acid and a conjugate base,

Q: 2. In a titration of 50.00 mL of 0.05000 M formic acid, HCOOH with 0.1000 M potassium hydroxide,…

A:

Q: calculated after 12.5 mL of titrant is added? Group of answer choices The pH is based on the…

A: reaction after adding HCl, F- + H+ ---> HF  Mmol of F- = M × V . = 25 ×0.1 = 2.5 mmol Mmol of…

Q: Phosphoric acid is a triprotic acid (Ka1 = 6.9 x 10-3, K2 = 6.2 × 10-8, and K,3 = 4.8 × 10-13). To…

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Q: Arsenic acid is a triprotic acid with the pKa values pK₁1 = 2.240, pKa2 = 6.960, and pK₁3 = 11.500.…

A: Here we have to determine the mass of NaH2AsO4 and NaH2AsO4 required to prepare 1L of buffer…

Q: To create a buffer solution, 40.00mL of a 0.100M benzoic acid (Bz) solution are mixed with 20.00mL…

A: This means potential of hydrogen and to calculate this we have to know the negative logarithmic…