A certain indicator, HA, has a K, value of 5.0 x 10-7. The protonated form of the indicator is red and the ionized form is blue. What is the pK, of the indicator? 2 pK₁ = What is the color of this indicator in a solution with pH = 4? purple red blue

Q: In a titration of 47.0 mL of a 0.750 M solution of a triprotic acid H3C6H5O7 (citric acid) with…

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Q: A diprotic acid is titrated with a strong base. The pH at the first half-equivalence point is…

A: During the acid-base titration where weak acid is the analyte and strong base is the titrant and as…

Q: Indicators are acids or bases whose various protonated forms have different colors. The volume…

A: Acid is a substance that give hydrogen ions in aqueous solution and base is a substance that give…

Q: A solution is generated by combining 50.0ml of 0.310M nitric acid (Ka=2.4x10^1) with 50.0ml of…

A: Solution :   While determining the pH of the solution which is generated by combining strong acid…

Q: 29. The acid HA has an ionization constant of 10-5, If 50 ml 0.1N HA is diluted to 200 ml and…

A: Ka (HA) = 10-5  pKa = -logKa        = -log ( 10-5 )        = 5Initial Normality of HA =M1 = 0.1…

Q: A certain indicator, HA, has a K₂ value of 4.0 x 10-7. The protonated form of the indicator is blue…

A:

Q: monoprotic acid has a Ka of 1.50×10−4. Sketch the titration curve for a 50.0 mL 0.10 M sample of…

A: IMPORTANT POINTS  As dissociation constant given in the question is in the powers of 10-4 ,which is…

Q: 40 mL of NaOH solution with unknown concentration is titrated with 0.10 M of CH3COOH solution in the…

A: From the given data we haveVolume of NaOH (V1)=40mlMolarity of NaOH (M1)=?Volume of…

Q: Which of the following acids is best to use to prepare a buffer with a pH of 4.5? НОC HАОСООН, Ка 3…

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Q: Bromcresol green changes color from pH 3.8 to pH 5.4. If the indicator is yellow at pH 3 and blue at…

A: Indicators are substances whose solution changes colour according to the change in pH. These…

Q: Which of the following acids should be used to prepare a buffer with a pH of 3.4? CH3COОН, Ка - 1.8…

A:

Q: Which of these conjugate acid–base pairs will not function as a buffer: C2H5COOH and C2H5COO-,…

A: A buffer solution is a solution that has weak acid and its conjugate base OR Weak base and its…

Q: A monoprotic acid has a Ka of 1.29×10−4. Sketch the titration curve for a 150.0 mL 0.050 M sample of…

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Q: Which of the following is the correct definition of endpoint?     The point at which the indicator…

A: To solve this problem we have to know about Titration  and the term endpoint .

Q: A solution is made by titrating 31.54 mL of 0.2315 M acetic acid (Ka = 1.74x10-5 M) with an equal…

A: 31.54 mL of 0.2315 M acetic acid31.54 mL of 0.2315 M KOHKa of acetic acid = 1.74×10-5

Q: A student is trying to prepare a buffer solution with a pH of 9.00. Calculate the mass of potassium…

A: pH of a buffer is calculated using Henderson -Hasselbalch equation    pH = 9  pka = -log Ka  We…

Q: If a colorless solution has [H3O+] of 7.25 x 10-2 M and thymol blue is added as an indicator, what…

A: Thymol blue is an indicator used in acid-base quantitative titration. In presence of acid it will…

Q: Explain how an acid-base indicator works in a titration. What are the criteria for choosing an…

A: Acid-base indicator are chemicals those are change colour, when they react with acid and bases. Acid…

Q: 6. The K, value of a monoprotic acid is 2.10-7. If a solution with a pH 4 is prepared by using 0.02…

A: pH = 4 pH = - log [H+]    4= - log [H+] [H+] = 10-4 M

Q: O The pH of the solution has decreased. O The pH of the solution has increased. O The green…

A: According to the question, the color of phenolphthalein changes from clear to pink in an acid-base…

Q: If a buffer solution is 0.160 M in a weak acid (Ka = 2.1 × 10-5) and 0.580 M in its conjugate base,…

A: The question is about calculating the pH of a buffer solution with the given data -

Q: In a titration of 80.0 mL of a 0.500 M solution of the diprotic acid H₂C3H₂O4 (malonic acid) with…

A: The balanced equation for the titration is H2C3H2O4(aq) + 2NaOH →Na2C3H2O4 (aq)+2 H2O(l)

Q: I have 0.2140grams of an unknown momoprotic acid that requires 27.4 mL of 0.0950M NaOH to reach the…

A: Let the unknown acid be represented as HA. Thus, reaction is shown as- HA + NaOH→NaA + H2O

Q: When Sudan Orange G is dissolved in the aqueous layer, what is the ionized form the indicator takes?…

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Q: Calculate the pH at the equivalence point for the titration of 0.170 M methylamine (CH3NH2) with…

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Q: In a titration of 77.0 mL of a 0.500 M solution of the diprotic acid H₂C₃H₂O₄ (malonic acid) with…

A:

Q: pH=pKa if the pH of the buffer solution contains equal concentrations of a weak acid and its…

A: A buffer solution contains a weak acid and its conjugate base.  The pH of a buffer solution can be…

Q: A buffer solution is 0.422 M in HCN and 0.268 M in NaCN . If Ka for HCN is 4.0×10-10 , what is the…

A: Calculate the value of pKa:

Q: The pH at the equivalence point in the titration of 0.10 M HF (k_{a} = 6.3 * 10 ^ - 4) with 0.10 M…

A:

Q: Which of the following is NOT a property of a buffer solution?   Question 8 options:   The maximum…

A: Using fundamental properties of buffer solution.

Q: A buffer solution is 0.405 M in HF and 0.200 M in KF. If Ka for HF is 7.2×10-4, what is the pH of…

A: Here given, Concentration of HF = 0.405 M Concentration of KF = 0.2 M Ka for HF = 7.2 x 10-4 We…

Q: A certain indicator, HA, has a K, value of 1.0 × 10-5. The protonated form of the indicator is red…

A: pKa = -log Ka pH = -log[H+]

Q: What is the pH of a buffer that is 0.185 M in a weak acid and 0.227 M in the acid's conjugate base?…

A: Henderson-Hasselbach equation shows the relationship between pH of a solution, the acid dissociation…

Q: Which of the following is true of a buffer solution that contains equivalent amounts of acid and…

A: buffer solution that contains equivalent amounts of acid and conjugate base means [Conjugate base ]…

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…

A:

Q: aculate the pH after 0.02 mol of HCI is added to the buffer Which of the following is NOT an…

A: A conjugate base, within the Brønsted–Lowry acid–base theory, is a species formed by the removal of…

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: You are making a buffer solution in the lab by combining the weak acid H2PO4- with its conjugate…

A:

Q: A student performs a titration of 52.0 mL of

A: At complete neutralisation point  1 H3PO4  + 3 NaOH →  Na3PO4 + 3 H2O   moles of acid = moles of…

Q: In a titration of 68.0 mL of a 0.750 M solution of a triprotic acid H₃C₆H₅O₇ (citric acid) with…

A: Given that -  Volume of triprotic acid, citric acid , H₃C₆H₅O₇  = 68.0 mL  Molarity of citric acid,…

Q: Aspirin (C 9H 8O 4) is a weak monoprotic acid (K a = 3.3 x 10-4). You are analyzing a sample for a…

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

Q: Determine the molar concentrations of Ca2+ and Cl- in a 0.38 M calcium chloride solution. 1) 0.38 M…

A:

Q: A 1.0-L buffer solution contains 0.100 mol acid, HA, and 0.100 mol base, NaA. The value of K, for…

A: We have given that we have 1L buffer having 0.1 mol of acid and 0.1 mol of base . Ka of acid is…

Q: What is the pH of a buffer solution that is 0.214 M in ammonia and 0.390 M in ammonium chloride…

A: First calculate Ka value for ammonia and use it to calculate the pH of the buffer solution.

Q: A 200mL solution of 0.3 M weak acid is titrated with 40 mL of 1.5 M NaOH. If the Ka of the acid is…

A: Number of mmoles of HA = Molarity x volume (mL) = 0.3 x 200 = 60 mmoles Number of moles of NaOH =…

Q: A certain indicator, HA, has a K value of 0.00025. The protonated form of the indicator is blue and…

A: • The values provided in the question are:-  i) Ka value of a certain indicator HA = 0.00025    •…

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.