what are ampholytes what is a zwitterion under what conditions do zwitterions exist

Q: The pKa of HEPES is 7.55 at 20 degrees Celsius, and its molecular weight is 238.1. Calculate the…

A: Given: The pKa of HEPES = 7.55  The molecular weight of HEPES = 238.1 We have to calculate the mass…

Q: Consider a titration of 40.00 mL of 0.1250 M Na2CO3 with 0.4000 M HCl.  Carbonic acid (H2CO3) has a…

A: The number of milliequivalents of sodium carbonate Na2CO3 = 40.00 x 0.1250 = 5 mmol The number of…

Q: 2. What is the hydrocyanic acid buffer solution containing 0.25 M hydrocyanic acid (HCN) and 0.50 M…

A: 2. For buffer solution pH = pKa + log [CN-][HCN]  pH = 9.31 + log 0.500.25 = 9.31 + log 2 = 9.31 +…

Q: This is a titration curve of an unknown amino acid. Does this look like glutamate? pH vs. Titrant…

A: The question is based on the concept of biomolecules. we have to establish the identity of the amino…

Q: Some kidney stones form by the precipitation of calciumoxalate monohydrate (CaC₂O₄H₂O,…

A: Given: Ksp of calcium oxalate monohydrate = 2.3 x 10-9 pH of urine…

Q: P3. What are the three main buffering system of the blood? bicarbonate, haemoglobin and (A) Write…

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Q: In a titration curve of any amino acid, pl's and any additional equivalence points are found as the…

A: To fill in the blanks:

Q: A stock solution contains 0.058 mM glucose. To 218 uL of this stock solution was added: 607 uL…

A: The number of moles of reaction always remains constant. Variables such as volume and concentration…

Q: A 0.9092-g sample of a wheat flour was ana- lyzed by the Kjeldahl procedure. The ammonia formed was…

A: Given that: Mass of wheat flour sample = 0.9092 g Molarity of HCI = 0.05063 M Volume of HCI = 50.0…

Q: you'd like to weigh out acetic acid and sodium acetate (pka=4.75) to use as buffer system to study…

A: A buffer system in the range of 4.9-5.2 is needed to be prepared using the acetic acid and the…

Q: Please sketch the titration curve of lysine. Then annotate X-axis, Y-axis, each pKa, PI and…

A: Here we are required to sketch the titration curve of lysine

Q: What is the solubility of CaF2CaF2 in a buffer solution containing 0.45 M formic acid and 0.20 M…

A: concentration of formic acid                                =  0.45 M  concentration of sodium…

Q: The Ksp of AgCl(s) at a specific temperature is 1.8 × 10^-10 M. The concentration of Cl-(aq) in…

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Q: 25ºC, AgCl (Ksp = 1.6 x 10-10) is less soluble as compared to PbCl2(Ksp = 2.4 x 10-4) True or…

A: We know that, solubility of salt depends on Ksp value of salt.  Ksp value is directly proportional…

Q: A solution of amino acid having carboxylic side chain was titrated against NaOH. If initial pH  of…

A: A molecule that have equal number of positive charged functional group and negatively charged…

Q: A 0.850 g sample of wheat flour was subjected to a Kjeldahl analysis. The ammonia formed after…

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Q: The R group of glutamic acid is ––CH2CH2COOH (pKa = 4.07). Sketch the titration of the sidechain of…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: How do you use the amount of 0.01 M NaOH used in titration to determine protein content? NaOH was…

A: NaOH being a secondary standard, is standardized using KHP.

Q: The iodine produced when an excess of KI was added to a solution containing 0.1518g of K2Cr2O2…

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Q: When a solution of leucine (an amino acid) in water is titrated with a strong base, the pH before…

A: given, at midpoint pH = 2.86   at mid point of titration, pH = pka = 2.86 thus, ka = 10-pka =…

Q: Weight of oil sample: 0.250g Volume of titrant used for titration: 29.2ml calculate iodine number…

A: Given: Weight of oil sample: 0.250g, Volume of titrant used for titration: 29.2ml,   To find:…

Q: Consider the following reactions. Explain how the addition of strong acid influences the solubility…

A: Le Chatelier's principle: This principle is used to predict the effect of a change in conditions on…

Q: The pKa's of H3PO4 are 2.0, 7.0, and 12.5. Assuming you have the sodium salts of all of the ionic…

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Q: Consider the data obtained from titration of HCl with NaOH to a phenolphthalein end point: MHCl =…

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Q: A 0.9092-g sample of a wheat flour was ana- lyzed by the Kjeldahl procedure. The ammonia formed was…

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Q: Trying to determine the amount of a DCPIP solution to oxidize the ascorbic acid (5ml). Data given A…

A: The volume of vitamin C solution of 10 mg/mL oxidized by DCPIP solution is determined by equation…

Q: The protein serum albumin has an isoelectric point of 4.90. Suppose you did a pH titration of a…

A: General abbreviation method: All the amino acids are given a three-letter abbreviation(or code)…

Q: A new amino acid has 2 carboxyl groups. the pka's of these groups are 2.18 and 5.02. The amino acid…

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Q: f a tetrapeptide, glutamate-glycine-alanine-lysine.

A: In this pI value concentration of Zwetterion is maximum and charge is neutral it can bot move in…

Q: In two SEPARATE flasks containing similar component of carbonate mixtures, the following volumes of…

A: Phenolphthalein is a chemical compound with the formula C20H14O4 . Phenolphthalein is often used as…

Q: 7. solution was observed to be 5.45, exactly halfway to its equivalent point. What is the Ka and pKa…

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Q: Which factors will cause protein denaturation? Select all that apply. a. aqueous phosphate buffer…

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Q: Calculate the ratio of lactic acid and lactate required in a buffer system of pH 5.00. The pKa of…

A: For a buffer containing a weak acid (HA) and its conjugate base (A-), it can be written:…

Q: Under what conditions do zwitterion exist What happens when zwitterion is titrated with an acid…

A: PART A - A zwitterion is a molecule that contains both positively and negatively charged functional…

Q: Iodometric titration of dichromate ions requires following conditions: Strong acid medium, starch is…

A: Since this is an iodometric titration, starch is used as the indicator that forms starch-iodide…

Q: Which factors will cause protein denaturation? ( all that applies) - small metal ions - Na+, Ca2+,…

A: Given answer of choices, - small metal ions - Na+, Ca2+, Cl- - aqueous phosphate buffer - heavy…

Q: The ascorbic acid in orange juice was titrated with Iodine solution using starch indicator. Identify…

A: The ascorbic acid in orange juice was titrated with Iodine solution using starch indicator.

Q: A mixture of valine, glycine, isoleucine, aspartic acid, phenylalanine, arginine, lysine,…

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Q: In order to prepare a properly concentrated growth solution at work, your colleague asks you to…

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Q: The pKa's of H3PO4 are 2.0, 7.0, and 12.5. Assuming you have the sodium salts of all of the ionic…

A: Here we have to find concentration proton donor and proton acceptor  respectively in 0.1 M phosphate…

Q: Chemistry 2. The pks of tye amino acid Arg are 1.82, 8.99, and 12.48. If Arg was used as a buffer,…

A: We have find out the ratio of conjugate base to weak acid in a pH of 7.00 Arg buffer.

Q: Calculate the pH at each of the following points for the titration of 100 mL of 0. 6 M dl-Histidine…

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Q: Q2. At 25°C, water dissolves 0.8108g of PbCl2 per liter, calculate the Ksp of PbCl2 at 25°C.

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Q: onsider the titration of a 30.00-mL 0.20 M solution of fully protonated form of tyrosine with 0.25M…

A: Fully protonated form of tyrosine means solution is in acidic form so use pka1

Q: To prepare a buffer with a pH of 4.32, one must choose a weak acid with a pKa of a. 5.42 b.  2.42…

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Q: The solubility of BaCO3 in water at 25C is 4.0x10^-5 mol/L. Calculate the value of Ksp for BaCO3 at…

A: Given data,  Solubility of BaCO3 in water = 4.0 × 10-5 mol/L

Q: Phosphate-buffered saline (PBS) is commonly made with 137 mM NACI, 2.7 mM KCI, 10.0 mM N22HPO4, and…

A: The solution consists of ions Na+, K+, Cl-, HPO4 2-, H2PO4 -, H3PO4, PO4 3- ( from Na2HPO4, KH2PO4)…

Q: To purify a certain protein, you were required to prepare a 0.10 M glycine buffer at pH 9.4.…

A: The one at pH 9.0 has a concentration of 10^-9 of H+, and the one at pH 10.0 has a concentration of…

Q: The initial pH of a 0.2M arginine solution is 14. a. What is the predominant structure of arginine…

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