Which of the following has the lowest pKa value

Q: A0.43 Mof a solution of week acid is 3.0 % dissociated. The PKa value of the acid is: (Write your…

A: No. of moles of H+ = 0.43 - 0.43×3100= 0.4171

Q: How was the theoretical value of the pKa determined? In that given graph

A: Explanation is given in the following step.

Q: sodium hypochlorite (NaOCl) was dissolved in a solution buffered to pH = 6.20 . find the ratio…

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Q: The Ka for an acid is 7.91 x 10-29. Calculate the pKa for this acid.

A: The pKa for the acid is to be calculated

Q: What is the pKa of an acid?  As the pKa value increases, does the acid strength increase or…

A: The pKa value is  method used for indicate the strength of an acid. pKa is the negative log of the…

Q: Acids and Bases Indicate the approximate pKa values of the protons labelled a-e in the molecule…

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Q: a) What is the {H*} activity if the pH measured in the lab with a pH meter is 12 (in DecExp)? (5…

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Q: The ionization constant Ka for formic acid is 1.77x10⁻⁴. What are the the pKa for formic acid and…

A: pKa=-log(Ka)pH of a weak acid;pH=12[pKa-logC]Where, C is concentration of the acid

Q: What molar ratio of H,PO, to H, PO, in solution would produce a pH of 7.07 Phosphoric acid (H»PO,),…

A: Henderson-Hasselbalch equation Equation, which is used to calculate the pH of a solution is called…

Q: B- Calculate the ( Ag ) mg analyte to mg precipitate for Ag;PO4 (FW P= 30.97) (FW Ag=107.87), (FW O…

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Q: Calculate Ka values from the following pKa’s: (a) Acetone, pKa 5 19.3 (b) Formic acid, pKa 5 3.75

A: pKa = -log Ka Ka = 10-pKa   (a) Acetone, pKa = 19.3 Ka = 10-pKa Ka = 10-19.3 Ka = 5.01 x 10-20   (b)…

Q: 1. Acid A has a pKa value of 5.71, and acid B has a pKa value of 5.30. Which of the two acids is the…

A: Ka is called the acid ionization constant. Strong acid has high value of Ka and weaker acid has…

Q: What is the pH of a solution containing 0.642 mol L-1 of a weak acid with pKA = 3.01 and 0.865 mol…

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Q: 5. Will the reactions shown below go the direction as indicated? -H- + CH3MgBr CH4 pKa = 25 pka = 50…

A: The reactions taking place are given as,

Q: Why does methyl orange have a lower pKa value (pKa~3.5) than methyl red (pKa ~5.1)? Provide detailed…

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Q: 7. Given the pKa information for different acids below, place the following acids in order of…

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Q: Calculate pKa

A: Given :- Ka for acetic acid = 1.8 × 10-5  To calculate :- pKa value

Q: What is the pH of a solution containing 0.876 mol L-1 of HCl and 1.069 mol L-1 of a weak acid with…

A: Strong acid dissociate completely so, the H+ concentration is more in the solution. And weak acid…

Q: What is the pKa value of Tris-HCl?

A: The molecular formula of Tris-HCl is: NH2C(CH2OH)3 ·HCl

Q: What is the Ka of an acid that has a pKa value equal to 3.93?

A: The pKa value as the negative logarithm of the Ka value: pKa = -log Ka. If we already know the pKa…

Q: The Ksp value for magnesium hydroxide is 5.61 × 10–12 at 25 °C. In a saturated solution of magnesium…

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Q: Solve the attached file

A: Benzene undergoes Nitration in the presence of nitric acid and sulphuric acid. NO2+ acts as an…

Q: Yttrium (III) carbonate (MM = 357.84 g/mol) has a Ksp of 1.0 x10-31.  If 15.5 g Y2(CO3)3 is stirred…

A: The solubility reaction of Yttrium (III) carbonate is given by  Y2(CO3)3 (s) -----> 2 Y3+ (aq) +…

Q: of the rxn 1. Use the table of AH°; values to calculate AH°, decomposition of Ca(NO3),: 2Ca(NO3)219)…

A: There are two questions are given but I am solving first one according to the guidelines of bartleby…

Q: range of pH values could be achieved with a buffer consisting of nitrous acid and sodium nitrite?…

A: Nitrous acid is a weak acid and sodium nitrite is its salt. So, here we have to use the Henderson…

Q: For the Buffers experiment, your group was tasked to prepare a 250.0 ml, 0.20 M pH 3.00 buffer from…

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

Q: Compare the relative acidity of 1-molar aqueous solutions of the following acids.NH4Cl CH3COOH…

A: The value of pka can be used to determine the acidic character of a compound. If pka is more, the…

Q: Find the pKa.pKa. For an acid HA, the concentrations of HA and A- A are 0.075 and 0.025,…

A: Given Values: Concentration of HA = 0.075 M Concentration of A- = 0.025 M pH of the buffer = 6.0

Q: 2. For pH values of 2.00, 6.00, and 10.00, calculate the alpha values for each species in an aqueous…

A: The relative equilibrium concentrations in terms of α value for triprotic acid, phosphoric acid are…

Q: pH = 7.15 + log [0.25]/[0.50] pH = pKa + log [0.33]/[0.11]; (Ka = 6.3096 x 10-8) [OH-] = 2.78 x…

A: Given : a. pH = 7.15 + log [0.25]/[0.50] b. pH = pKa + log [0.33]/[0.11]; (Ka = 6.3096 x 10-8) c.…

Q: 3) Which of the following will have the lowest pka value? Briefly explain your choice.

A: The acidic strength of a compound is inversely related to its pKa value that is, higher the acidic…

Q: Why does methyl orange have a lower pKa value (pKa~3.5) than methyl red (pKa ~5.1)?

A: We are to discuss why pKa value of methyl orange is lower than that of methyl red.

Q: Determine the dissociation constants for the acids. Express the answers in proper scientific…

A: Note : As per our guidelines we are supposed to answer  first 3 part. Please repost other part as…

Q: How could you separate a mixture of the following compounds? The reagents you have available to you…

A: Solvent extraction is the liquid-liquid extraction wherein the compounds are separated based on…

Q: pKa values are different in different solvents. For example, the pKa of hydrofluoric acid (HF) in…

A: Acid dissociation constant, Ka is a measure of acid strength. Higher the Ka, higher will be the acid…

Q: Explain why pyrrole (pKa ~ 17) is a much stronger acid than ammonia (pKa = 36).

A: There are some definitions which can define acids and bases on the basis of their behaviors. Three…

Q: 3. Phosphoric acid is tribasic, with pKa's of 2.14, 6.86, and 12.4. The ionic form that predominates…

A: using the given pka to determine the ionic form that has maximum concentration.

Q: Calculate the Ka for the weak acid knowing the pKa value is 13.07

A: Acid dissociation constant, Ka represents how strong the acid is in a solution.

Q: grade 12 chem:  Show all work, include units, keep work as precise as possible and only apply sig…

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Q: pKa

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Q: 0.650 mg of Rb,SeO4 (FM 313.89) is dissolved in 2.000 L of water. What are: (a) |M Rb2SeO4 (b) M Rb*…

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

Q: Why is imidazole a stronger acid (pKa = 14.4) than pyrrole (pKa ~ 17)?

A: Imidazole is an amphoteric substance that is it can act as both an acid and a base. When it acts as…

Q: Question 30: Which statement about the pKa value is false? * The pKa value is calculated from the…

A: More the Dissociation  Constant more the  acidic strength and Less will be pka

Q: Calculate the pKa of an acid with Ka = 7.77 x 10-4. %3D O A. 2.230 О в. 3.110 O C. 4.147 D. 7.160 O…

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Q: A 0.022 2 M solution of HA is 0.15% dissociated. Calculate pKa for this acid.

A: Acid is the substance that gives proton while the base is the substance that gives hydroxide ion in…

Q: Explain why pyrrole (pKa ~ 17) is a much stronger acid than ammonia (pKa = 36).

A: Pyrrole- It is heterocyclic aromatic compound. It bears nitrogen with lone pair of electron and…

Q: 4. Acid A has a pKa value of 5.71, and acid B has a pKa value of 5.30. Which of the two acids is the…

A: A strong acid is completely dissociated in an aqueous solution. On the other hand, a weak acid is…

Q: Acid A has a pKa value of 5.71, and acid B has a pKa value of 5.30. Which of the two acids is the…

A: Weak acid: Weak acid does not dissociate completely when dissolved in water. Strong acid:  Strong…

Q: Given that pK1=1.30 and pK236.70, what is the pH of the solution? What is the [H*] of the final…

A: pH is the scale to measure] a substance which is a acidic or basic in nature. It is range 0 to 14 .…

Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.