The temperature probe was kept in the calorimeter until the temperature had been stabilized and was calibrated. A beaker was placed on a hot plate with dial turned between three and four. Another 100.00 ml of deionized water was added while the beaker is heating up. Using the temperature probe, the beaker was measured
The first test was to measure levels of dissolved oxygen and temperatures at different depths. The procedure for testing the dissolved oxygen and temperature was carried out using a submersible probe. The procedure consisted of lowering the submersible probe by 50 cm increments deeper and deeper into the lake water off of the dock and taking measurements at each increment. The measurements were then recorded, averaged, and reported to the rest of the class. Another test was taken, but this time it was a sampling of the plankton in the lake water.
The lump of milk fat was transferred to that Ziploc bag. 9) The bag was labeled with the initial temperature of heavy cream (3˚C) and the trial number (1) in permanent marker, and then placed in the refrigerator to firm up. 10) The weigh boat was placed on the electronic balance, and the electronic balance was zeroed to the weigh
One thermometer have a wet bulb , the bulb of the thermometer have a wet tissue or cotton while the other thermometer have a dry bulb and both were moved in a waving motion for two minutes and read the results after reading let the thermometers stand for two minutes before getting the next reading. The said procedures are repeated every thirty
I will put the thermometer into the beaker and stir the water, leave the thermometer till the temperature stays constant.-this will give the normal water temperature. 13. I will take the water out the beaker and wipe it dry. 14. I will activate the heat packs wait for a minute put thermometer onto the copper to see the temperature 15.
A stir bar was added to the bath to evenly heat the water, and the stirring was turned on. The gas pressure sensor was plugged into Channel 1, and the temperature probe into Channel 2 of the LabQuest. “Sensors” was selected at the top of the screen, then “Data Collection.” The drop down arrow was clicked in the Mode box, and “Selected Events” was selected. The Name was kept as “Event,” and the corresponding Units box was left blank.
The question is, how does a physical or chemical change affect the mass of a substance within a closed system? To respond to this question, my group did a lab to determine whether or not the mass would change or not. Our lab was to have a plastic bag containing baking soda, then add a cup of vinegar and a block of clay to the mix. We made sure to weight every element separately and then add them up for our total mass of 31 grams before the reaction. During the reaction, as soon as the vinegar was poured in there was a gas produced, bubbles.
Put the beaker with the water and the metal on the wire gauze of the ring stand that has the bunsen burner under it. Fill the graduated cylinder with enough water to about fill the calorimeter and record the amount of water and the temperature of the water that is in the graduated cylinder. When the water starts to boil in the beaker, use the thermometer to record the temperature of the water. Pour the water from the graduated cylinder into the calorimeter. Use the crucible tongs to take the metal out of the beaker and place the metal into the calorimeter and close the
Next, I began the process of the experiment in class.
The experiment that was done was to figure out “Does the amount of calcium chloride affect the temperature of water?” For the procedure, the experiment asked to record the initial temperature of 75 mL of water. The first trial said to add zero scoops of calcium chloride and stir for two minutes to record the temperature. Once the first temperature was recorded, it must be written from the difference between the initial temperature and the new temperature. Next, it asked to add one scoop of calcium chloride and stir for two minutes and record.
The probe was let to soak in the liquid for thirty seconds. The date analysis was started after thirty seconds and the probe was left in the liquid for five seconds to establish a baseline. After the baseline was established, the probe was pulled out and taped to the table with the end of the probe facing out of the table. The data collection should continue until the graph reaches a absolute minimum. Using the statistics option in the LabQuest probe, a change in temperature will be calculated for each trial.
OEI: Method: 1. A beaker 100ml tripod 2. Thermometer inside water via retort stand 3.
Continue to heat the solution until it reaches about 55℃. Using the test tube holder, transfer the liquefied solution tube to the 25℃ water and record the temperature at 30-second intervals using a clock or stopwatch using a pencil until the solution reaches 35℃ or close to the temperature due to experimental error. While cooling, gently stir the solution using the thermometer until the solution begins to solidify. Once all the data is collected, reheat the solid solution tube in the warm water until it melts and remove the thermometer and wipe it off to avoid the solution adhering to the thermometer. After the data has been recorded, clean-up the lab station and put away the lab
What type of chemical reaction will a balloon receive when filled with an acid and base? Acids and bases are around us everywhere in various types of liquids. They are in the foods we eat and the things we use on a daily basis, for example liquid dishwashing soap. Acids are usually sour and bases are silky, giving it a bitter taste. Water can act like both, depending on the situation.
Cyclohexane is put into 25mL round-bottom flask. It is heated to a boil. Once it starts boiling, it evaporates up touching the tip of the thermometer and into the condenser, and out into a graduated cylinder to be recorded. Every 1mL of cyclohexane that dropped into the graduated cylinder, was recorded alongside with the temperature. During the first 3mL of cyclohexane temperature was raising at a fast paste.
