There is still carbon dioxide gas dissolved in the liquid at atmospheric pressure. The amount is very small and depends on temperature. It would be interesting to try this experiment again with a cold bottle and a warm bottle. Because carbon dioxide affects the pH of the soda it might be interesting to compare the pH of the fresh out of the bottle and the "defizzed" soda. What is the pressure that is used to put the carbon dioxide into the bottle in the first place?
Stretch the mouth of the balloon over the mouth of the bottle then turn the balloon completely upright so that the baking soda inside the balloon pours into the vinegar. Compare the size of this balloon to one expanded with only half the amount of baking soda and vinegar or half the amount of baking soda added to the same amount of vinegar. The reaction between baking soda and vinegar can be followed by analyzing the change in temperature, pH, mass and other parameters as the reaction progresses to
Conditions that must remain constant in this experiment include the temperature of the water baths and the volume of peas and beads in the respirometers. The general gas law states that if temperature and volume remain constant, then the pressure of the gas will change in proportion to the number of molecules of gas present. 2. Water moves into the respirometer pipettes because as oxygen is consumed by the peas, the pressure within the pipettes will decrease and thus the negative pressure will draw the water into the pipette. It is important to correct the readings from the peas because the glass beads are used as a control in which no changes should occur in CO2 and oxygen levels due to their abiotic nature.
Oxygen is delivered to the body. vii. Carbon dioxide is passed from the blood into the lungs. The air enters through the nose and mouth and there are tiny hairs inside your nose and in the throat called cilia that traps the dust particles before it travels down the trachea into the bronchus then into the bronchioles and into the alveoli which you will find in the lungs. The alveoli passes the oxygen to the blood capillary by diffusion (high – low) and this is also how the waste (carbon dioxide) is passed back to the lungs to be breathed out this is why there is only a thin membrane so it can be passed through easily.
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.
We then collected the data and analyzed the sine graph and the different portions of it and what they meant including the parameters and taking proper data. We took the best fitting data according to the computer and recorded it into table 1. We then used and derived calculations from our lab manual theory section to compare our results to a given spring constant of 20 N/m. The equations that were derived and examples are labeled below in the data section and show that our experiment was performed adequately as our data was off by sub ten percent error which can easily be corrected with better equipment and environment. Human error was also a factor in this experiment as we had to wind the machine ourselves in order to produce the oscillation.
The boiling point and melting point can also be used to identify an unknown substance. Date:_________________ Name____Nic munoz ________________ 1. Title: 1pt Liquids and solids 2. Procedure (4pt) (Write the procedure in your own words after you read the manual) 1. B.Pt: I poured rubbing alcohol in a beaker and rubber banded it with the thermometer.
We also collected an accurate amount of acidified water, used to start the reaction. Everything before that point was done with accuracy so we believed it would be a successful experiment, however, we encountered a small problem while swirling the reactants in the”R” tube. The directions stated to swirl untill the solution is in room temperature and we followed this rule but other groups swirled until they saw the reaction getting to a pale yellow. We put the solution over the bunsen burner while it was still pretty brownish in color. For our second experiment, we did not repeat this possible mistake.
Also string (about 75cm) was needed in this experiment which would help pull the cart with the help of the masses that were used. As well a stopwatch was required in order to keep track of the time of how fast the cart had traveled from point A to point B. Furthermore two paper clips were also needed in order to attach the cart and the masses to the string. Paper towels would be used to soften the fall as the masses were dropped. Also a pulley with a table mount is required to support the string.
9. Find the average time for each clay with different mass to hit the ground. 10.Find the speed of the parachute in each trial and the random uncertainty from the repeat trials. 11.Plot a graph of mass (x-‐axis) against time (y-‐axis) to look for a relationship. If the first graph is not linear it will be necessary to further process the data and plot further graphs to try to find a