Phenolphthalein indicator is a weak acid with Ka = 10-9 mol/dm-3. It is colourless while its conjugate base is pink in solution. Define the term" WEAK ACID"

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: Which species is responsible for the formation of red color of the solution using red cabbage…

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Q: Calculate the buffering index for a solution containing 1 × 10–2 mol L–1 of acetic acid when the…

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Q: You prepare a standard solution of ferrous ammonium sulfate that is 50.0 ppm in Fe. You pipette…

A: The solution is given below -

Q: How many moles of NaA would need to be added to 512 mL of 1.28 M HA to produce a solution with a pH…

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Q: A 0.0450 M solution of benzoic acid has a pH of 2.78. Calcula pK, for this acid. What is the percent…

A: 5.) Given that : The molarity of benzoic acid = 0.0450 M pH of the solution = 2.78

Q: Hypochlorous acid (HOCI) is the main disinfecting form of "active chlorine" or bleach. a. Using its…

A: a)   HOCl dissociates in aqueous solutions as per the following reaction:   HOCl↔H++OCl-

Q: 6- An indicator with acid dissociation constant (5.6×10-6), it's pH range will be ... 3.2-5.2…

A: Given: Acid dissociation constant of the indicator (KIn) = 5.6×10-6 We have to find the pH range of…

Q: Phosphoric acid (H3PO4) is tribasic, with pKa's of 2.14, 6.86, and 12.4. The charge of the ionic…

A: Given: pKa's of phosphoric acids are 2.14, 6.86 and 12.4. And the pH of the solution = 8

Q: Calculate the acid dissociation constant Ka of a 0.2 M solution of weak acid that is 0.1% ionized is

A: Given, A solution of weak acid that is 0.1% ionized.

Q: The following observations are made about a diprotic acidH2A: (i) A 0.10 M solution of H2A has pH =…

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Q: 9. The conductivity of a 0.01 M aqueous solution of a weak acid HA at 298 K is 5.17 x 10- S cm. At…

A: Molar conductivity λm is defined as the conducting power of all the ions present in 1 mole of an…

Q: A 20-year-old student with coffee addiction had an episode of extreme hyperventilation due to…

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

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Q: The indicator ethyl orange is an acid with a Ka of 4.6 ✕ 10−5. In a 1.9 ✕ 10−4 M solution, it is red…

A: The change in color of ethyl orange, when the pH of solution is changed, shown below.

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: How many grams of glycine amide should be added to 1.00 g of glycine amide hydrochloride to give 100…

A: The given solution is a buffer solution whose pH can be determined using the Henderson-Hasselbalch…

Q: 2-aminophenol hydrochloride is pictured at right. As is, the acid is fully protonated, the H from…

A: 2-aminophenol hydrochloride, HO-C6H4-NH3+Cl- is a diprotic acid with pka values of pKa1 = 4.70 and…

Q: The acid-dissociation constant, Ka, for gallic acid is 4.57x10-3. What is the base-dissociation…

A: Base dissociation constant is a constant which occur at the equilibrium in which base reacts with…

Q: Calculate the hardness of water in units of mg/L of CaCO3 (see equation 15-7)  if your titration at…

A: Given that the titration is at p H =10 and resultant concentration is 21 mmol/L. The water hardness…

Q: How does diphenylamine sulfonate indicator work? Give specifics on how it is an indicator

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Q: A weak monoprotic acid, HA dissociates by 2.416 % and has a pH of 3.61. Calculate the Ka value for…

A: percent dissociation of HA is 2.416% pH = 3.61

Q: (b) 0.15 moldm of benzoic acid (CeHsCOOH; Ka of benzoic acid = 6.3 x 10-5 moldm- %3D 3)

A: Acid dissociation constant measures the acidic strength of an acid. Higher the value of Ka, higher…

Q: Oxalic acid, H2C204, has acid dissociation constants of Ka1=5.90×10-2 and Ka2=6.40x10-5. Calculate…

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

Q: CH3COOH+ NaOH The first titration used phenolphthalein, the endpoint was 43.5ml The second titration…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: What are some possible sources of error in determining the Ka value of an unknown acid except for…

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Q: The acid dissociation constant K, of carbonic acid (H,CO,) is 4.5 × 10~7. Calculate the pH of a 4.0…

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Q: Use the proper graphing techniques to find the equivalence and half-equivalence points and determine…

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Q: 10.06 cm3 of the stock 0.100 mol dm-3 solution of NaOH was required to fully neutralise 49.5 mg of a…

A: Volume of NaOH = 10.06 cm3  Molarity of NaOH = 0.100 mol dm-3  Mass of diprotic acid (H2A) = 49.5 mg…

Q: 2-aminophenol hydrochloride is pictured at right. As is, the acid is fully protonated, the H from…

A: 2-aminophenol hydrochloride, HO-C6H4-NH3+Cl- is a diprotic acid with pka values of 4.70 and 9.97.…

Q: Phenol red is a common acid-base indicator. It has a pKa equal to 8.000. Its undissociated form is…

A: Solution a)

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

A:

Q: Selenic acid, H2SeO4, is a diprotic acid that actually is a strong acid for the donation of its…

A: The dissociation of weak acid is very low as compared to strong acid and base. The weak acid and…

Q: If the absorbance of one of the buffer solutions (pH = 4.604) was 0.314 and the absorbance of the…

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Q: for the following, please identify the titrant and analyte!!!     Prepare a titration for a 5mL…

A: The of any titration is to find out the concentration of the unknown solution using known…

Q: Equimolar solutions of HF, HCOOH and HCN at 298 K have the values of Ka as 6.8×10^-4, 1.8×10^-4 and…

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Q: What mass of NaN3 needs to be added to water to give a 1.0 L solution with pH= 9.43. For HN3 : Ka =…

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Q: Consider a diprotic acid with pKa values of 1.60 and 4.50, that is colorless when fully protonated,…

A: A question based on pH concept, which is to be accomplished.

Q: What is the selenide ion concentration [Se2-] for a 0.100 M H2Se solution that has the stepwise…

A: The concentration of H2Se is 0.100 M. The dissociation constants, Ka1 and Ka2, of H2Se are 1.3×10-4…

Q: Phenolphthalein is an acid–base indicator. In solutions of pH 6 8.5, it is colorless; in solutions…

A: Acid base indicators are sensitive to pH. They change their colour depending on the pH of the…

Q: lowest percentage ionization? (Hint: no need for calculations) 0.01 M HC2H302 (Ka = 1.8 x 10-5) O…

A: 2. Answer - The correct option is (c) 0.01 M HF (KA = 6.8*10^-4) Explanation - The percent ionized…

Q: Diprotic acid system. a. Plot the ionization fractions (ao, ɑi, a2) as a function of pH (0-14) for…

A: a. α0=Fraction of H2Aα0=[H+]2[H+]2+Ka1[H+]+Ka2

Q: Arrange the following bases in order of decreasing strength: Caffeine (Kb = 4.10 x 10-4), Codeine…

A: basic strength directly proportional to kb.  so higher kb then higher strength.

Q: Methyl orange is an indicator that changes color over a range from pH =3.1 to pH =4.4 . What is Ka…

A: Ka = 1.6 × 10-4

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: Is Hexamminecobalt(III) chloride acidic or basic? What are the properties that make it that?

A: In this question, we have to find out the correct answer of given problem by the help of the…

Q: An indicator with Ka = 6.45 X 10-5 is yellow in acid and blue in base.   Showing a calculation for…

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

Ionic Equilibrium

Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.

Arrhenius Acid

Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions. Keeping it similar to the general acid properties, Arrhenius acid also neutralizes bases and turns litmus paper into red. 

Bronsted Lowry Base In Inorganic Chemistry

Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.