Over time, as their free fatty acid (FFA) content increases,edible fats and oils become rancid. To measure rancidity, the fator oil is dissolved in ethanol, and any FFA present is titrated withKOH dissolved in ethanol. In a series of tests on olive oil, a stocksolution of 0.050 Methanolic KOH was prepared at 25C, storedat 0C, and then placed in a 100-mL buret to titrate any oleic acid[CH₃(CH₂)₇CH=CH(CH₂)₇COOH] present in the oil. Each offour 10.00-g samples of oil took several minutes to titrate: thefirst required 19.60 mL, the second 19.80 mL, and the third and fourth 20.00 mL of the ethanolic KOH.(a) What is the apparent acidity of each sample, in terms of mass% of oleic acid? (Note:As the ethanolic KOH warms in the bu-ret, its volume increases by a factor of 0.00104/C.)(b) Is the variation in acidity a random or systematic error? Ex-plain.(c) What is the actual acidity? How would you demonstrate this?

Q: In one trial of the standardization of a Na2S2O3 solution, a 10.00 mL volume of 5.00×10-3 M KIO3 is…

A: Given data is as follows: The volume of KIO3 = 10.00 mL The concentration of KIO3 = 5.00×10-3 M The…

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A:

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Q: Mark and John, two vinegar enthusiasts, are each tasked to determine the acetic acid content of…

A: Given: Mass of KHP = 0.540 g Molecular weight of KHP = 204.22 g/mol Purity of KHP = 99.4% Volume of…

Q: A quantitative analysis for ethanol, C2H60, is accomplished by a redox back titration. Ethanol is…

A:

Q: In one trial of the standardization of a Na2S2O3 solution, a 10.00 mL volume of 5.00×10-3 M KIO3 is…

A: Solution is given below in next step

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A:

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Q: A company gave Phereseadula, who is an analyst, 6.00 L of H3PO4 and he was required to calculate its…

A: The question is based on the concept of titrations. we have to calculate concentration of stock…

Q: al 0.3IT M 5. Forgetful Freddy weighed his KHP sample, but forgot to bring his report sheet along, o…

A: Given: Standardization of NaOH using KHP KHP + NaOH = KHP-Na  + H2O NaOH: V = 18.46 ml M = 0.2987 M…

Q: The Kc for the reaction 2A (aq)=3 B (aq) is 0.085. What is Kc for the reaction 3 B (aq) = 2A (aq)?

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Q: Consider the following solubility data for acetanilide and aniline: Solubility per 100 mL water…

A: Given data :-

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Q: How much solute (g) is required to prepare 850 mL of a 0.5 M solution of CuSO4 (MW = 159.61 g/mol)…

A: Molarity = moles ÷ volume

Q: KHP (aq)+NaOH (aq)-->NaKHP (aq)+H2O(l)   Trial  Vi (mL) Vf (mL) 1 36.19 48.56 2     3       A…

A: According to the chemical equation, the number of moles of KHP react with NaOH are equal.

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Q: What mass of silver carbonate (MW = 275.75 g/mol) precipitates when 18.0 mL of 3.2M silver acetate…

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Q: What is the exact concentration of the NaOH titrant in molarity? Express your answer in 3…

A: Since you have asked a question with multiple subparts, we will answer only 3 subparts for you. In…

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A:

Q: Write the full balanced molecular cquation for the reaction described, with state signs for all…

A: As mentioned in the question, the subparts (e), (f) and (g) have been answered.

Q: We want to determine the purity of alum sample bought in a local pharmacy in Miagao. A Chem 28…

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Q: 4. Here you titrate 100 mL of carbonic acid (H;CO) of unknown concentration with 0.01 M of potassium…

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Q: A permanganate solution is prepared by dissolving 20.0123 g KMNO4 in 500 mL of distilled water and…

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Q: Rei and Akari, two vinegar enthusiasts, are each tasked to determine the acetic acid content of…

A: Given: mass of KHP = 0.540 g Volume of KHP stock solution = 10.0 mL Volume of diluted KHP solution =…

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Q: What is the normality of a K2Cr20, (294.2 g/mol) solution prepared by dissolving 5.00 g of K2Cr207…

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Q: Solution A was prepared by weighing 6.08 grams of K3Fe(CN)6 (MW 329.2 g/mol) and dissolving the…

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Q: A quantitative analysis for ethanol, C2H60, is accomplished by a redox back titration. Ethanol is…

A: The explanation is given below-

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Q: Solution A was prepared by weighing 6.08 grams of K3Fe(CN)6 (MW 329.2 g/mol) and dissolving the…

A:

Q: The tartaric acid, H2C4H4O6 (150.087 g/mol ) in 100.0 mL wine sample was determined using sodium…

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Q: What mass of Fe(OH)3 (MW = 106.87 g/mol) will be obtained when 100. mL of 0.240 M FeCl3 (MW = 162.2…

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".