Remove balloons with tongs to show the decrease in volume of the gas inside. Demonstrate that the gas remains inside the balloon by warming the balloon back to room temperature. The flashlight can be used to show that some of the components of air have been condensed. An extension of this demonstration is to distill the air following the procedure by Switzer (J. Chem. Educ.
Go to the stockroom and obtain a glass-stoppered flask, which will serve as a pycnometer, and samples of an unknown liquid and an unknown metal. When measuring the density of a liquid make sure that your flask is clean and dry. Weigh the dry flask with its stopper on the analytical balance, or the top-loading balance if so directed, to the nearest milligram. Fill the flask with distilled water until the liquid level is nearly to the top of the ground surface in the neck. Put the stopper in the flask in order to drive out all the air and any excess water.
Make sure the rubber stopper is securely in place since gas can easily leak out. Collecting the gaseous product: Prepare the gas collection bottle by positioning the bottle so that its mouth is. directly over the hole at the bottom of the trough; this is where the gas will enter the bottle. After the reaction, slide a square of glass over the mouth of the bottle while the bottle is still under water. Keeping the glass fixed to the mouth, raise the collection bottle and invert.
After finishing modeling the frame, the artist will seal the frame and cover it with a release agent for easy removal of the rubber mold. Then, the next step is the mold making. There are several choices of material for the molds including latex, polyurethan rubber, or silicone. For a model with a larger scale, many molds might be required to create the model. When the artist finishes pouring his mold and letting it cure, he will then cover the inner surface of the mold by pouring molten wax onto it to make an even coating.
When the gas comes out of the ground, it comes out wet. The first stage of the refining process involves on-site heating of the gas to 212 degrees to evaporate any non-methane hydrocarbons and fluids that are mixed into the gas. (Arthur, 2008) The condensate that is generated from this process is then vented into the atmosphere. The condensate often contains the same chemical additives that are added to the well during the fracking process, as well as volatile organic compounds that are naturally occurring in the ground where the gas is stored (Witter,
The aspirator was turned to medium high, and then the copper was poured onto wetted filter paper. Using distilled water to remove all copper from the beaker. Once completely on filter paper 6mL of acetone was added to the copper to help dry it out. The filter paper was then removed and set down to dry completely. Once dry the filter paper was weighed with the copper on it and subtracted from the original weight to see the amount of copper left after
Align the stem of the tube (deflated) to the stem hole in the wheel, put it in. Get all the tube inside the tire using your hands, and then with the levers put the edge of the tire inside the wheel. Grab your bike and put the wheel back on, make sure the tire is pointing forward. Tighten the quick release hub and pump some air into the tube, deflate the tube, and pump it completely full this time. So when you get a flat tire, remember that fixing it is not hard
The study of specific heat falls under the category of Thermochemistry which is further divided into the category of Calorimetry. An instrument called a calorimeter is used to measure specific heat. A piece of metal is placed in a container of water. This is then boiled. The piece of metal is then taken out of the boiling water and placed in a calorimeter which contains room temperature water.
And limiting reagent which is the reactant that is completely consumed when a reaction is run to completion. III. Summary of Procedure In this lab the first procedure was to measure the initial temperature of NaOCl and of Na2S2O3 and measure it with a thermometer and then record it. The same thermometer is used for measuring both solutions, but the thermometer should be washed with distilled water after the using it in one solution. Afterwards a small amount of NaOCl was added to the graduated cylinder.
Part II: Charles Law Lab A sample of gas is sealed in a closed container with a moveable lid and an attached heater. The pressure inside the container will be held constant throughout the entire experiment. There is an attached thermometer that displays the temperature inside the container. As you increase or decrease the heat from the heater, the moveable lid of the container will move and you will use the markings on the side of the container to measure the resulting volume of the gas. 1.