Q: If a 0.4340g sample of methenamine were treated in the usual way with 25mL of 0.6500N H2SO4 and…
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Q: Synthesis of benzoic acid 1. What qualitative test is performed to monitor precipitate formation of…
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Q: A multivitamin sample has a label claim of 500 mg ascorbic acid (176.12 g/mol). According to quality…
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Q: A 20.0 mL portion of a 0.300 M solution of hydrochloric acid is to be titrated with a standarized…
A: It is an acid – base titration. The complete neutralization reaction is given below.
Q: A mixture of sodium carbonate and sodium bicarbonate is dissolved in water and treated with 0.100 M…
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Q: What happens when a zwitterion is titrated with an acid?
A: A zwitterion of an amino acid looks like as shown below.
Q: Please help me answer this. In a test tube, 5 mL of cooking oil and 5 mL of detergent solution were…
A: Since you posted multiple questions as per guidelines we will solve only the first question for you.…
Q: A multivitamin sample has a label claim of 500 mg ascorbic acid (176.12 g/mol). According to quality…
A: After 6 months - NaOH required was 22.48mL and 0.1101M. Number of moles of NaOH, n = Molarity *…
Q: In the 2,4-DNPH test, a yellow precipitate indicates a positive test result. Is this always the case…
A: Given: In the 2,4-DNPH test, a yellow precipitate indicates a positive test result.
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Q: Carly the chemist consistently obtained a dark pink endpoint in all of her titrations in her KHP…
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Q: What weight of pure Na2CO3 should be taken so that about 25mL of approximately 0.1M HCl will be used…
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Q: Can some one explain how benzoic acid is insoluble with water and also insoluble with 1m hcl? But is…
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Q: How do the reactions of phenol samples with FeCl3compare? Which structural component of the phenols…
A: Since we only answer one question at a time, we'll answer the first one. Please resubmit the…
Q: When preparing a soap it is always required that the pH be verified, if it comes out too high, how…
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Q: Please answer the following questions: 1. The phenolphthalein HIn indicator forms this equilibrium…
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Q: Convert the titrant into desire Totally convert analyte into de form Shou
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Q: Which among the statements to promote large precipitates is INCORRECT?
A: Option 4 is incorrect Lower the relative supersaturation (RSS) valve,larger the precipitate…
Q: .. Suppose you wanted to further purify the acidic or basic component of your mixture. What might be…
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Q: A multivitamin sample has a label claim of 500 mg ascorbic acid (176.12 g/mol). According to quality…
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Q: How would the calculated molar concentration of the analyte be affected if the burette is rinsed…
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Q: the percentage of sodium bicarbonate in the sample
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Q: A suitable target for the titration is 30.0 cm3 of 0.025 moldm-3 Br2(aq) Justify why a much smaller…
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Q: A student recorded the following end-point volumes in an iodometric titration using starch…
A: Titration error is -3.89 x 10-4 .
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: When one would like to run an experiment with EDTA, sometimes it is necessary to do back titration.…
A: Sometimes when performing EDTA titration the metal ions block the indicator or metal EDTA complex…
Q: 2. What is the physical observation when the endpoint has been achieved during titration?
A: Endpoint: refers to the point at which the indicator changes color in an acid-base titration.
Q: Ethanol is needed as solvent when preparing phenolphthalein color indicator in volumetric…
A:
Q: In a two-vessel technique titration set-up, what is the unknown substance if the volume of…
A: To determine the mixture of substances in the sample
Q: Why should be solution of sodium bicarbonate be boiled during titration with HCI?
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Q: Aside from repeating the experiment, search literature and suggest what can be done to remedy a…
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Q: 1. What are possible qualitative chemical tests that can be used in identifying aspirin in the…
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Q: As a stabilizer for solutions of ascorbic acid for injection use: A) sodium bicarbonate B)…
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In excess of alkaloidal reagent, did the precipitate formed dissolve or not? What is the evidence
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Solved in 2 steps
- A. Why is there imidazole in the wash buffer?What factor affects the ‘strength’ of a buffer? Why was benzoic acid used as a solvent when making up the glucose stock standard solution?Would you recommend adding the phenolphthalein and methyl orange indicators together at the start of the titration to save time?
- Select all the solvents/solutions in which you would expect this compound to dissolve:In two SEPARATE flasks containing similar component of carbonate mixtures, the following volumes of titrant were obtained for phenolphthalein and methyl orange endpoin respectively: (1) 21.0mL (2) 24.0mL. What is/are the component/s of the mixture that is/are being reacted at the PHENOLPHTHALEIN endpoint? a. NaOH and NaHCO3 b. Na2CO3 only c. NaOH and Na2CO3 d. NaHCO3 onlyWhat is the purpose of this experiment? To analyze the purity of salicylic acid after the recrystallization method of purification.
- Write the letter that corresponds with the compound described by the following statements. It will give a yellow precipitate in the iodoform test Will react fastest in ZnCl2 in HCl Least soluble in H2ODoes heptanol and benzaldehyde precipitate and gives a positive iodoform test? Explain.How do the reactions of phenol samples with FeCl3compare? Which structural component of the phenols account for the observation? 2. What compound is the precipitate formed in the Bromine water test? 3. Write the reaction formed in the formation of phenolphthalein. Identify the functional group in phenolphthalein, which is responsible for the indicator property. 4. What is the significance of Millon's test?
- What would be the effect of a more dilute solution of NaOH on the titration?What is the purpose of titration? What is the purpose of phenolphthalein? Why is phenolphthalein traditionally used in titrations?What is the reaction for the 2-methylpropan-1-amine(Isobutylamine) titration with hydrochloric acid? Explain how to solve such tasks. Thanks
