Given the chemical equation for the anthocyanin extract of red cabbage as an indicator. HIn + H20 S H30* + In¯ Using the results from the experiment, identify which of the reactant/product are responsible for the red and green color of the indicator. Notes: solution turns red after adding acid; solution turns blue/green after adding base RED: BLUE/GREEN: Why is the color violet/blue at pH near 7? Answer in 1 sentence. Hint: What is the relationship of the species responsible for the observed colors?

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: Phenolphthalein (Ka = 1 x 10−9) would be a good indicator choice for the titration of a weak base…

A:

Q: A 100.0-mL aliquot of 0.100 M diprotic acid H2A (pK1 = 4.00, pK2 = 8.00) was titrated with 1.00 M…

A: Given: Concentration of H2A = 0.100 M Volume of H2A solution = 100.0 mL = 0.100 L…

Q: Which will make a good substitute for bromocresol green in a double indicator titration?…

A: Aqueous bromocresol green indicator solution is yellow below pH 3.8 and blue above pH 5.4. Between…

Q: An indicator with an acid dissociation constant of 2.19 x 10‑5 could typically be used for a…

A: The question is based on the concept of titration. it involves  the application of indicator. we…

Q: 11. Which of the following statements are true regarding an acid-base indicator? (Select all that…

A:

Q: 1. On each graph, identify an indicator that could be used in the titration, and write the name of…

A: A suitable indicator is the one, that gives color change during equivalence point.  Equivalence…

Q: Q.1: Determination of % composition of mixture of KI & KNO3 using Eoscein as indicator.

A: Percent composition by mass is given by the percentage composition of a given compound is the ratio…

Q: Use 0.50L of the buffer made from 2.5M citric acid and 0.5M sodium citrate to answer the following:…

A: Since you have posted question with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: A chemist named Ed Sheerin titrates X mL of a 0.5379 M butanoic acid (HA) solution with 0.581 M…

A: Number of moles of butanoic acid = 0.5379 × 0.001X = 0.0005379X mol At equivalence point, number of…

Q: 4. A liquid compound is subjected to a variety of tests with the following results: Lucas test:Clear…

A:

Q: A series of acid-base indicators were added to four separate samples of a solution with an unknown…

A: The data given is,

Q: 21. For which of the following titrations would phenolphthalein (end point occurs at pH = 9.1) be…

A: The endpoint of the phenolphthalein occurs at pH 9.1. It states that this indicator is best for…

Q: Thymol blue is a unique indicator that has two set of color change, red to yellow near pH = 1.5 and…

A: The given chemical reaction is, HCl + NaOH ⟶ NaCl + H₂O Thymbol blue: It is also called…

Q: 1. On each graph, identify an indicator that could be used in the titration, and write the name of…

A: An indicator is a substance which is used to determine the end point of titration, it changes its…

Q: Identify a possible analyte and titrant being used in the titration plot depicted below. 14+ pH 7…

A:

Q: 1.Which of the following substances have a solvatochromic property? a.potassium hydrogen phthalate…

A: According to Q&A guidelines of Bartleby, we are supposed to answer only the first question out…

Q: Thymol blue is a diprotic acid/base indicator which we will call H2A. H2A is red, HA- is yellow, and…

A: Indicators are substances used to indicate whether the solution medium would be acidic or basic.…

Q: For bromocresol green indicator, the pka of the indicator is about 4.7.  Estimate the pH range over…

A: Indicators are used to indicate the nature of the solutions when they are added to it by changing…

Q: Use 0.50L of the buffer made from 2.5M citric acid and 0.5M sodium citrate to answer the following:…

A: pH is a scale used to specify the acidity or basicity of an aqueous solution. A buffer solution is…

Q: Question attached

A: The pH value of the buffer solution is based on the pKa values of the acid When the pKa value of the…

Q: A buffer solution with pH = 5.0 is required, which one of the following acid, together with its…

A: The pH value of a buffer solution mainly depends upon the pKa value of the acid. If the pKa value 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: The indicator propyl red has Ka = 3.3 × 10-6. What would be the approximate pH range over which it…

A: Given information,      Ka value of the given indicator propyl red is 3.3 × 10-6

Q: -10 What A chemistry graduate student is given 125. mL of a 1.70 M hydrocyanic acid (HCN) solution.…

A: when weak acid HCN ionises in water

Q: A certain indicator, HA, has a K₂ value of 4.0 x 10-6. The protonated form of the indicator is red…

A: Given data :  Ka=4.0×10-6pH=7 To find: pKa and color of indicator at pH 7

Q: A solution is tested with three indicators and it has a pH of 4.6. Identify the colours of the…

A: Indicator are those species which changes colour according to solutions pH .

Q: An indicator (ka 1.7X10-6) is red but changes to blue when ionized. The indicator was used in the…

A: Given: Ka of indicator = 1.7 × 10-6.

Q: If the actual mass of a base used (sodium citrate dihydrate) in a buffer solution is 1.5 g, and the…

A: Given,  Actual mass of base (sodium citrate dihydrate) = 1.5 g  Concentration of the acid (ammonium…

Q: Calculate the pH at equivalence.

A: In this titration weak acid (Propanoic acid) is titrated with strong base NaOH, so salt of a weak…

Q: 3. Complete neutralization of 10 ml. of phosphoric acid solution by NaOH 0.I N in the presence of…

A: During titration of phosphoric acid we can use either methyl orange and detect first end point…

Q: 27 mL of 0.08 M acetic acid solution is titrated with 0.10 M NaOH.  What is the pH after 22 mL of…

A: No of moles of CH3COOH = M × V                                               = 0.08 × 27 mL= 2.16…

Q: If the hydroxide concentration of a HNO3/NO3- buffer system is 0.00000025 M, what is the nitrate…

A:

Q: How will you prepare 500 ml of 0.750 M citrate buffer with a pH of 4.25 from solid citric acid…

A:

Q: An instrument used to measure the acidity or alkalinity of a solution.

A: As per bartleby guidelines I answered only first question so please don't mind.Thanks in advance.

Q: Consider the following indicators: dinitrophenol (pKIn = 3.5), bromothymol blue (pKIn = 7),…

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

Q: 14 12 10 8 26 Chart Area 2 Acid 1 -Acid 2 2 4 Volume 0.20 M NaOH (mL) 6 8 Use the above figure to…

A: #7: We are given the titration curve for two different acids by NaOH, and we have to find the the…

Q: Which of the given statements are CORRECT for an indicator that ionizes as shown below (Ka=1.0 x…

A:

Q: Blank titration is carried out using AgNO3 and which sample solution?     Distilled water NaCl or…

A: Blank titration is carried out using AgNO3 and which sample solution answer - 4) main water sample…

Q: What is the H3O* | and the pH of a benzoic acid-benzoate buffer that consists of 0.13 M C6H5COOH and…

A: Given: Concentration of C6H5COOH = 0.13 M Concentration of C6H5COONa = 0.30 M Ka of C6H5COOH =…

Q: Consider the following indicators: dinitrophenol (pKin = 3.5), bromothymol blue (pKın = 7),…

A: Indicators are the chemical components used in titrations (acid-base). They are added in a small…

Q: A chemist generates the titration curve shown by slowly 12 adding 1.0 M sodium hydroxide (NaOH) to…

A: Ka is the acid dissociation constant for weak acid like acetic acid. When Ka is taken -log value ,…

Q: In one experiment, if 25 mL of sodium hydroxide (0.5M) is titrated with nitric acid solution giving…

A: The question is based on the concept of volumetric analysis. standard Sodium hydroxide has been…

Q: 500 mL of 0.1019 M NaOH solution is left open immediately after preparation, and it absorbs 0,652 g…

A: When solution of acetic acid is titrated with NaOH solution using an indicator this is an example of…

Q: A student is preparing to titrate 25.00  mL of 0.2 M  NaOH.   He has options to use among 3 weak…

A: NaOH is titrated with three monoprotic weak acids To determine which is the best titrant :

Q: For which of the following titrations would phenolphthalein (end point occurs at pH = 9.1) be the…

A: Indicator in chemical reaction is chemical substance which changes color in a chemical change. An…

Q: Find the mass of sodium formate that must be dissolved in 110.0 cm3cm3 of a 1.0 MM solution of…

A:

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.