(ii) Phenolphthalein indicator represented by HIn, is a weak acid that dissociates in water as follows: Hln(aq) + H*(aq)+ In (aq) Colourless red colour Explain the colour change observed at the end point of an acid-base titration where phenolphthalein is used as indicator with the acid in the conical flask.

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A: There are the concept of electrolytes

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A: Correct option is D

Q: Which of the following statements regarding complexometric titrations is incorrect ?

A: Complexometric titrations: It is a kind of Volumetric analysis , where formation of colored complex…

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A:

Q: Which of the following 1:1 mixtures would be best suited to form a buffer closest to a pH of 3.70?

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Q: 18mL of the diluted solution (S1) are transferred into a 250 ml beaker, then titrated with a…

A: 1. To add the volume of Solution S1: Pipette 2. To add solution of HCl: Burette

Q: (ii) Phenolphthalein indicator represented by HIn, is a weak acid that dissociates in water as…

A: HIn(aq) ⇌ H+(aq) + In-(aq)  Colourless                 Red colour

Q: A buffer is made from 25.0mL of 1.0M CH3COOH and 25.0mL of 1.0M CH3COONa, what would be the pH of…

A: Since moles = concentration X volume of solution in L  Hence the moles of CH3COOH taken = 1 X 25 /…

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Q: The colour indicator is present in the solution in: .A Molecular form .B ionic form (In-) .C Both .D

A: The colour indicator is present in the solution in:

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A: Given: The equation is:  Let the concentration of HIn = x Let the concentration of In- = y Given…

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

A: To find: A description about the basis of buffer action and indicator detection

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A: 1- First calculate the volume of KOH :  We will used the equation, ( M2V2)KOH = ( M1V1)HF  ( 0.50M ×…

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A: * Step 1 in the procedure would be the preparation of standard KHP solution.

Q: Three drops of the phenolphthalein chemical indicator should be added to the acidic analyte sample…

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Q: How is the equivalence point determined in potentiometric titrations? Please explain briefly.

A: Answer is explained below.

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A: Hii there, As there are multiple question posted. we are answering first question. If you need…

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A: According to Le Chatelier’s principle, “When a system experiences any disturbance in the equilibrium…

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A:

Q: Which of the following will raise the pH of a weak acid HA in aqueous solution? I. addition of HNO3…

A: (I) HNO3 is a strong acid and thus decreases the pH of the solution. Therefore, pH won’t increase on…

Q: bmuodos Cthet Supposc 0.5160g of sample is added to 50.00 mL of 0.1000M HCl. The resulting solution…

A:

Q: An acid-base indicator, HIn, dissociates according to the following reaction in an aqueous solution.…

A: The given reaction is: HIn(aq)⇌In-(aq)+H+(aq) Absorptivity of protonated form, HIn = 2777 M-1 cm-1…

Q: ACID-BASIC TITRATION IN NON-AQUATIC MEDIA IS USED TO QUANTIFY SUBSTANCES WHEN Choose one answer: O…

A:

Q: Question attached

A: The reaction is shown as, Na2CO3+HCl→NaHCO3+HClNaHCO3+HCl→NaCl+CO2+H2O

Q: In Experiment 4, you used phenolphthalein HIn as indicator in titrating the acid content of samples.…

A:

Q: Why does the color change of an indicator take place over arange of about 2 pH units?

A:

Q: You are asked to determine the ethanoic acid, CH3COOH content in a vinegar sample. Give suitable…

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A: Point A : Na2Se  Point B : Na2Se + NaHSe  Point C : NaHSe ( first equivalence point)

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A:

Q: Calculate the concentration of the acid, if 13.45 mL of 1M NaOH solution was needed to react with…

A: Given information, Volume (V1) of NaOH = 13.45 mL Concentration (M1) of NaOH = 1 M Volume of acid…

Q: in the titration of 50.0 mL of 0.0200 M C6H5COOH(aq) with 0.100 M NaOH(aq), what is/are the major…

A: The given data is as follows:                      The concentration of C6H5COOH = 0.0200 M The…

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