Weight of test tube and t-butanol weight of emtpy test tube weight of t-butanol freezing point of t-butanol Temperature (deg C) 45 40 35 30 15 10 5 0 0.000 ... 100.000 13.349 g 8.661 g 4.688 g 200.000 Cooling Curve Run #1 300.000 Time (s) 400.000 .... ● ● 500.000 600.000

Q: Explain why more sugar dissolves in a cup of hot coffee than a glass of iced coffee.

A: Introduction: The dissolution of any solute particles depends upon the speed at which solute…

Q: How do intermolecular forces affect freezing point depression.

A: Given question a intermolecular forces and freezing point depression. intermolecular forces affect…

Q: Explain how hydrophilic and hydrophobic colloids can be stabilized in water?

A: Dear student I have given answer to your question in the image format.

Q: Differentiate between Un-Saturated Solutions and Saturated solutions?

A: Saturated solution: A solution in which maximum dissolvable amount of solute is present and more…

Q: What is the heat of dissolution? Write the expression that gives the change of molar heat of…

A: Solution :     Heat gained or lost by the system is calculated by the amount of heat transfer during…

Q: Define the term colloidal dispersions?

A: When particles are randomly distributed in a substance or medium then it means the particles are…

Q: Why does a system freeze?

A: A system is the part of the universe which is under thermodynamic study.      Universe = System +…

Q: Explain the molecular reason why the vapor pressure decreases when glycerol (C3H5(OH)3) is dissolved…

A: The answer is given as follows Vapour pressure : This is a pressure exerted by the gas which is in…

Q: What is the heat of hydration (∆Hhydration) ? How does theenthalpy of solution depend on the…

A: The heat of hydration has to be defined and how enthalpy of solution depend on the relative…

Q: Sketch the interaction of water with an ammonia molecule.

A: The interaction of water with ammonia molecule is as follows: Due to the electronegativity…

Q: Define colloid

A: Every system is made of two components: the dispersed phase and the dispersed medium. The particles…

Q: A sample of 46.53 mg of chymotrypsin was dissolved in water and diluted to a total volume of 5.161…

A:

Q: How can the Hydrophobic colloids be stabilized by hydrophilic groups on their surfaces?

A: The hydrophobic colloids be stabilized by hydrophilic groups on their surfaces has to be explained…

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A: As the molecular weight increases, the boiling point also increases. Also, with a decrease in the…

Q: Arrange the following substances in order of increasing solubilityin water:

A: solubility order in water is  alcohol > alkyl halides > hydrocarbon ( comparable  molecular…

Q: Why startch solution easily dissolve in water with regards to the topic of colloidal dispersion?

A:

Q: How will the solubility of NaCl in water be affected by an increase in pressure?

A: Solubility is the amount of solute that gets dissolved in a given amount of solvent at a particular…

Q: A 23.54-mg sample of unknown compound E produced 44.09 mg of AgCl when analyzed by the sodium fusion…

A: Fusion of an organic compound with sodium leads to ionization of groups present in it. These groups…

Q: What will be the change in freezing point temperature (in °C) of barium hydroxide when added to 500…

A: Given,  The change in freezing point temperature (in °C) of barium hydroxide when added to 500…

Q: (CH 12 HW Exercise 12.66 with feedback Rev One brand of laundry bleach is an aqueous solution…

A: The concentration of 4.00% sodium hypochlorite, NaClO, in bleach means that 4 mL of sodium…

Q: Which is the better solvent?

A: According to the like dissolve like principle, a polar compound is soluble in polar solvent and a…

Q: Find the value of K for the reaction 2 S(s) +3 0(g)=2 SO3(g).

A:

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Q: What are some similarities between a true solution and a colloidal dispersion ?

A: A solution is composed of two elements one which is present in large amount is named as solvent and…

Q: (b) How do the structures of these molecules account for these differences in solubility? Provide a…

A: The amount of a substance that goes into the solution is termed as the solubility of the substance.…

Q: What are lyophobic colloids? Give one example for them.

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Q: When carrying out a freezing point depression experiment with cyclohexane, napthalene, and an…

A: The question depends on the concept of colligative property. Depression in freezing point is a…

Q: 1-A sample of pure t-butyl alcohol weighing 6.22 g was found to have a freezing point of 24.7 °C.…

A:

Q: Which substance, sucrose or CaCl, has more pronounced effect on the boiling point elevation and…

A: When a solute is added, then there is elevation in boiling point of solution and depression in…

Q: Arrange the following in terms of increasing water solubility in section II and dipole moments in…

A: The explanation is given below-

Q: What is meant by Reversible sols.

A: The colloidal solution in which dispersed phase is solid and  dispersion medium is liquid is known…

Q: Why does freezing point decrease and boiling point increase when solute is added? Please answer in…

A: Please find the below attachment.

Q: Explain why on addition of 1 mol of glucose to 1 litre of water, the boiling point of water…

A: The underlying principle is of Elevation of boiling point. According to which, when a non volatile…

Q: How can it be demonstrated that colloidal particles are electrically charged ?

A:

Q: What is the boiling point elevation and freezing point depression all about, and how is it related…

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

UV Visible Spectroscopy

Spectroscopy refers to the absorption or emission of light or other radiations by matter. When a substance or chemical absorbs light or radiation, they reach an excited state followed by de-excitation or emission of the light or radiation forming distinct spectra. UV-visible spectroscopy or  ultraviolet-visible refers to the absorption and emission in the ultraviolet and visible regions of the electromagnetic spectrum.