198 Laboratory Manual for General, Organic, and Biological Chemistry 6. Predict what is present in each of the following: a. A solution that turns orange-red when mixed with Benedict's reagent and heated for 5 min. b. A solution that turns blue-black when mixed with a few drops of iodine reagent. c. A solution that forms a white precipitate when mixed with a few drops of ARNO,.

Q: Which is correct regarding an aqueous solution of NH3? It will: a. produce few ions b. produce…

A: Ammonia (NH3) has one lone pair of electrons hence ammonia is a weak base.

Q: 4. Why is it necessary to standardize a sodium hydroxide solution? a. Sodium hydroxide is basic…

A: The NaOH is Alkaline (basic) in nature . In the titration reaction base is used. The base is…

Q: 56. The following reagents should be stored together: A. sulfuric acid and acetone B. sulfuric acid…

A: The question pertains to the safe storage and compatibility of chemicals in laboratory settings.…

Q: A substance that changes color to signal the end of a titration procedure is called:   a. an…

A: In titration we used a subtance that helps to locate the end point I.e. the end of titration…

Q: Name Haley oyle 20yle Sec. QUESTIONS 1. Why must the Erlenmyer flask and graduated cylinder be dried…

A: The answer are as follows:

Q: 10. What color is does litmus paper turned when dipped into an acidic solution? * А. гed B. blue C.…

A: A litmus paper helps in the distinction of the solution. It helps in differentiating whether the…

Q: A 1.2525 g sample of canned tuna was analyzed by the Kjeldahl method: 30.25 mL of 0.1200 N HCl was…

A: The given data contains, mass = 1.2525 g. Volume = 30.25 ml = 0.03025 L. Normality of HCl =0.1200 N.

Q: How many mL of 0.050M NaOH is required to exactly neutralize 50.0 mL of a 0.00257 M HCl soln?   A.…

A:

Q: 8. When doing a titration, which of the following steps is performed last? Select one: A. preparing…

A: Given: Some statement regarding titrations To find: The step that is performed at last  Solution:…

Q: A gallon of Del Monte White Vinegar is labeled 5% acidity. How many gallon of pure acid must be…

A: Given: Volume of Del Monte White Vinegar = 1 gallon. The acidity of Del Monte White Vinegar = 5 %…

Q: neutralization, the products are   A. sodium chloride   B. salt and water   C. a nonmetal…

A: Neutralization reaction It is a reaction between an acid and a base

Q: 7. Select the answer that best describes an aqueous solution made from sodium nitrate (NaNO3).  a.…

A:

Q: A solution of NaCl that contains a relatively large amount of NaCl per given amount of water is said…

A:

Q: . A substance added to disrupt the bond atoms B. A substance added to speed up the chemical…

A: Catalysts are substances that change the rate of a reaction by altering the reaction's direction. A…

Q: A buffera. slows down chemical reactions.b. speeds up chemical reactions.c. increases the pH of a…

A: Solution- A buffer - maintains a relatively constant pH. Changes the pH of acid and base solutions.…

Q: What is the pH of a boric acid buffer solution containing 0.18 mol/L of boric acid, НзВОз, and 0.12…

A: Introduction :  We have to calculate pH of boric acid .

Q: Which of the following can be fully dissociated when dissolved in a solvent? A. acetic acid B.…

A: Electrolyte is substance which dissociate in to ions.

Q: 16. Match the pictures in each question with the descriptions of solubility

A: Blue positive speheres = cation  Yellow negative spheres = anion  All the cations and anions are…

Q: 41. What volume of 0.110 M H2SO4 is required to exactly neutralize 10.0 mL of 0.085 M NaOH? a. 0.19…

A: According to the balanced equation, when H2SO4 reacts with NaOH : H2SO4 + 2 NaOH --> Na2SO4 + 2…

Q: 02. Homogenous mixture:   A. Emulsion B.Hydroalcoholic Solution C. Air D Two of the choices

A: Please note- As per our company guidelines we are supposed to answer only one question. Kindly…

Q: Solutions make it easier to   A.handle chemicals safely   B.react chemicals with one another…

A: Solution is made up of two components. Solute and solvent. The component which is present in major…

Q: How many milliter of 0.200M NaOH will be required to neutralize 75.0mL of 0.215M H2SO4? a.161…

A:

Q: If a sample of Distilled and alkalinized water is exposed to red litmus paper, it will turn the…

A: Distilled water has the neutral pH of 7 while alkalinized water has the pH of 8-9. The mixture of…

Q: titration reactions, what do you call the chemicals where the concentrations is unknown? Select one:…

A: Titration can be defined as the volumetric analysis for determination of  the concentration of a…

Q: The controlled addition of a liquid into a vessel to measure the volume that reacts with a substance…

A: "The controlled addition of a liquid into a vessel to measure the volume that reacts with a…

Q: 28. A certain vegetable dye is pink in acidic solutions, green in neutral solutions, and blue in…

A: The vegetable dye is pink in acidic solution , blue in basic solution. It is grren in neutral…

Q: 43 In titration reactions, what do you call the chemicals where the concentrations is unknown?…

A: In titration reactions, the chemicals where the concentrations is unknown is called as

Q: On reacting 20 ml of a solution containing 3.65 g of HCI with 20 ml of a solution containing 4 g of…

A:

Q: A stock solution of HCI is standardized by titrating a pure 0.3056 g sample of dry sodium carbonate.…

A: Given that -  Mass of dry sodium carbonate = 0.3056 g  Volume of Hydrochloric acid = 30.20 mL…

Q: A solution containing 10. mmol of and 5.0 mmol of is titrated with 1.5  M HCl. What total volume of…

A: In this millimoles of HCl should be equal to millimoles of Base.

Q: Multiple Choice Each of the numbered items or incomplete statements is followed by answers or by…

A: Titration is a chemical analysis technique used for finding the concentration of a substance in a…

Q: concentration

A:

Q: 51. The substance being analyzed is the: a. Titrant b. Analyte Salt d. Indicator

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

Micelles and Biological Membrane

Micelles are the type of lipid molecules that organize themselves in spherical shape in aqueous solutions. The production of the micelle is a reply to the amphipathic behavior of fatty acids. It means that they consist of both hydrophobic regions and hydrophilic regions. In micelles, polar head groups (hydrophilic groups) produce an outer layer associated with water whereas nonpolar tails (hydrophobic groups) are organized in the interior.