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Category: Chemistry

  • colligative properties of solution

    Colligative Properties of Solutions

    Colligative properties are physical properties of a solution that depend only on the number of solute particles, not on the type of solute.

    This means: Different substances can produce the same colligative effect if they have the same number of particles in solution.

    Types of Colligative Properties

    There are four main colligative properties:

    1? Vapor Pressure Lowering

    Explanation

    When a non-volatile solute is added to a solvent, the vapor pressure of the solution decreases compared to the pure solvent.

    Example:

    Pure water evaporates faster than sugar solution.

    Formula

    Where:

    P = lowering of vapor pressure

    = vapor pressure of the pure solvent

    = mole fraction of solute

    2? Boiling Point Elevation

    Explanation

    A solution boils at a higher temperature than the pure solvent.

    Example:

    Pure water boils at 100C

    Salt solution boils above 100C

    Formula

    Where:

    Tb = boiling point elevation

    = Vant Hoff factor

    = boiling point elevation constant

    = molality (mol solute/kg solvent)

    3? Freezing Point Depression

    Explanation

    A solution freezes at a lower temperature than the pure solvent.

    Example:

    Pure water freezes at 0C

    Salt solution freezes below 0C

    Formula

    Where:

    Tf = freezing point depression

    = freezing point depression constant

    4? Osmotic Pressure

    Explanation

    Osmotic pressure is the minimum pressure required to stop osmosis through a semipermeable membrane.

    Example:

    Red blood cells shrink or burst due to osmotic pressure differences.

    Formula

    Where:

    = osmotic pressure

    M = molarity

    R = gas constant

    T = temperature (Kelvin)

    Vant Hoff Factor (i)

    The Vant Hoff factor represents the number of particles produced when a solute dissolves in a solution.

    Substance

    i

    Glucose (CHO)

    1

    NaCl

    2

    CaCl

    3

    Non-electrolytes i = 1

    Strong electrolytes i > 1

    Summary

    Colligative properties depend on the number of solute particles

    They do not depend on the chemical nature of the solute

    There are four colligative properties

    More particles greater colligative effect

    Requirements:

  • CHEM 1010 discussion post

    Discussion 2 – Week 3 Discussion

    Must post first.

    For this week’s discussion, select one of the elements from the periodic table and draw its electronic configuration and explain its atomic number, mass number, valency, if that element has any isotopes or not, and also provide one of the reactions of your choice.

    Please remember to always add references and provide substantial answers. Also, respond to one other post submitted by your peer. This post needs to actually discuss the submitted work by your peer. In lieu of this, you can also respond to a post submitted by your professor. But, such a response too should be an actual discussion. An actual discussion is not merely stating, “Good job,” or other similar phrases. The references should not be from sources, such as Wikipedia, yahoo.com, answers.com, etc.

  • biomolecules

    Biomolecules are of extreme importance to living organisms. Biomolecules are often categorized as macromolecules or micromolecules. Many applications of biomolecules exist, from nanotechnology to surface-immobilization. More commonly, you might have heard of carbohydrates, proteins, and nucleic acids. The science behind how a biomolecule works is fascinating, and you now have an opportunity to research them for yourself. Pick a biomolecule, you can be as specific as you would like, or pick a broad category.

    Conduct additional research on your biomolecule in relation to a real-world application and be prepared to discuss this data with your executive leadership. You will provide an analysis of the compound addressing the following:

    1. Introduction of your team.
    2. An overview of the compound you are working with.
    3. The reason why your team is focusing on this compound in the field you chose.
    4. Description and characteristics of the compound.
    5. Two processes, theories, etc., with all relevant details that use the biomolecule or group chosen.
    6. Which process/theory/etc. is more important for your company to consider and why? How might the choice benefit the company’s bottom line?
    7. One compound chemical reaction with all relevant details discussed.
    8. Statistics related to your biomolecule (i.e., if you are talking about carbohydrates and the effects on the human body, you may want to discuss metrics surrounding how carbohydrates affect the bodys weight or nutrition).
    9. Visual/graphical representation of the statistics collected (e.g., line chart, pie chart, histogram, formulas, tabulated data).
    10. Discussion of how this compound is used in everyday life.
    11. Conclusion that ties all of these concepts together.

  • Chloro alkali process

    Write the chloro alkali process

    Requirements:

  • organic chem 2

    please look through it and show work

    Attached Files (PDF/DOCX): 3533 HW1.pdf

    Note: Content extraction from these files is restricted, please review them manually.

  • This compound is useful in this industry. The uses are as be…

    He discovered this compound. He is a hreat chemist he gives the uses also. This discovery helps us today in many industries.

    Requirements:

  • NaCl meaning?

    Chemistry course

    Requirements:

  • ?

    ? ? ?

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    Requirements:

  • Liquid and atam

    this subject is very eand

    Requirements:

  • Organic Chemistry: Step-by-step Mechanisms for Elimination R…

    I need a detailed and accurate solution for Question 3 (parts a and b) from the attached image. Requirements: Graphical Mechanisms: You must draw the complete stepwise mechanisms using curved arrows to show electron flow. Specifics for 3a: Show the formation of the carbocation (E1 mechanism) and identify the major alkene product according to Zaitsev’s rule. Specifics for 3b: You must show the anti-periplanar transition state/conformation for this E2 elimination to determine the correct stereochemistry of the product. Format: Hand-drawn scans or digital drawings (ChemDraw) are acceptable, but they must be clear and legible. No text-only explanations. Deliverables: Clear images/PDF showing the mechanisms and final structures for both 3a and 3b.

    PLEASE NOTE: If you are not 100% sure about your organic chemistry skills or cannot provide accurate, neat drawings of the mechanisms, please do not bid on this task. I had a bad experience with the previous tutor who provided wrong reactions. I need someone who truly understands E1/E2 mechanisms and anti-periplanar geometry. Quality is more important than speed. Thank you.

    Requirements: