QuestionQuestion

AVOGADRO'S NUMBER

1. The initial volume in a graduated cylinder was 2.03 mL. A student added 100 drops of an oleic acid solution to the graduated cylinder and the final volume was 3.07 mL.

(a) What is the volume of one drop from the dropper? Show full calculation, with units and sig figs.

The solution used was 0.50 % (by volume) oleic acid.

(b) What is the volume of oleic acid contained in one drop ? (Remember 0.50% = 0.0050) Show full calculation, with units and sig figs.

One of the above drops was used to create a film with a surface area of 127 cm². Assume the film is a very wide but short cylinder, therefore

volume of this film = (surface area) x (thickness)

Note: The film is created by only the oleic acid in the drop, the remainder of the drop is ethanol, which dissolves into the water. Also remember that 1 mL = 1 cm³.

(c) Use the volume from 1b and the surface area given to calculate the thickness of the film in cm. Show full calculation, with units and sig figs.

2. Describe the procedure for the experiment. This could be in an outline format or a flow chart format or paragraph format. It should not be copied directly from the manual. (This should be between ½ and one page, you may use the back of the page)

3. Briefly discuss all safety precautions related to this experiment. (chemical and equipment related). See additional information regarding chemical handling and waste treatment on next page.

DETERMINATION OF AVOGADRO'S NUMBER

Chemical Handling and Waste Treatment

Normal laboratory safety practices must be followed at all times. MSDS sheets are available in the laboratory.

The oleic acid solution is ethanol based which makes it flammable. Do not use near sparks or flames.

The lycopodium powder is a very fine solid which makes it flammable, do not use near sparks or flames. Avoid inhalation of the powder it can irritate the nose and lungs. If any of the powder is spilled, wipe the bench top with a wet sponge or paper towel after the experiment is completed. Also wipe the floor if any of the powder is spilled because it can make the floor slippery.

Skin contact does not pose any serious danger, however (as with all chemicals) rinse any exposed areas with cold tap water immediately.

Disposal of all reagents is as follows: rinse down the drain with lots of cold tap water.

Solution PreviewSolution Preview

This material may consist of step-by-step explanations on how to solve a problem or examples of proper writing, including the use of citations, references, bibliographies, and formatting. This material is made available for the sole purpose of studying and learning - misuse is strictly forbidden.

    $25.00
    for this solution

    or FREE if you
    register a new account!

    PayPal, G Pay, ApplePay, Amazon Pay, and all major credit cards accepted.

    Find A Tutor

    View available Chemistry - Other Tutors

    Get College Homework Help.

    Are you sure you don't want to upload any files?

    Fast tutor response requires as much info as possible.

    Decision:
    Upload a file
    Continue without uploading

    SUBMIT YOUR HOMEWORK
    We couldn't find that subject.
    Please select the best match from the list below.

    We'll send you an email right away. If it's not in your inbox, check your spam folder.

    • 1
    • 2
    • 3
    Live Chats