To calibrate, soak the electrode membrane into a High Standard solution for at least 24 hours prior. Then enter 1000 mg/L as the concentration for ‘reading 1’. When the value stabilizes hit ‘keep’ as it will save the max concentration. Next, remove from High to Low Standard solution and set ‘reading 2’ as 10 mg/L when the value stabilizes. After calibrating, remove the probe and rinse with distilled water, and blot with a paper towel.…
This will be your calorimeter. Since Styrofoam is a good insulator, 2 Styrofoam cups make an excellent calorimeter. 5. Measure the mass of this calorimeter with your scale. After you do this, fill the calorimeter about three-quarters…
An oatmeal can calorimeter was used for the experiment. The way it works is really simple; a glass of water is places in an oatmeal can. The oatmeal can as a hole cut out in the side to place the food that is on fire in. The before and after measurements of the water temputure are taken. The higher the water temputre rose the more calories.…
Quantification of Iron in Whole Grain Cereal Jacob Rickman and Yasmeen Coan Submitted to: Curt Zanelotti CHEM 1045, Experiment No. 12, April 15, 2016 LABORATORY WRITTEN REPORT Honor Code Signature: _________________ Objective In this experiment, we gained an understanding of the relationship between chemistry and food products while developing and enhancing good lab techniques. We applied dilution concepts to carry out the experiment.…
Procedure: This lab was performed based on the procedure outlined in “Exp #7 Calorimetry.” No changes to the procedure were made. Data and Observations:…
The experiment that I am doing is to see if the water temperature affects the reaction time of an Alka-Seltzer explosion. I believe that it will affect the time of how fast the CO2 builds up because the faster it builds up, the quicker the reaction and therefore the explosion comes faster. Alka-Seltzer is a drug that is used for heartburn and indigestion relief, along with many other things. When Alka-Seltzer was first introduced, it was advertised in comics in the newspaper in 1931.…
Introduction: Alka-Seltzer is a medication used to alleviate ailments such as heartburn and acid indigestion1. The ingredients that the tablet is made up of helps explain the name of the medication, the sodium bicarbonate is used to balance stomach acid, help spread the aspirin which allows the speed of absorption to increase, and reacts with citric sodium which produces carbon dioxide2. One initial observation of the Alka-Seltzer tablet and water is that when the tablet was dropped into the water, it began to fizz and make the water look like a carbonated drink such as Sprite. Carbon Dioxide is the gas that humans exhale and what is produced with Alka-Seltzer and water react, the chemical equation of the reaction is, (H2O + C6H8O7 + 3NaHCO3…
We carefully weighed the crucible, cover, and magnesium ribbon together. The total mass was recorded. Next, we heated the crucible with the magnesium in it, but we left the cover aside. When the Magnesium started to burn, we put the cover back on to put out the fire. We continued to heat the crucible for a minute before taking off the cover.…
Poke a hole through the aluminum with the skewer and place your thermometer in (make sure the hole isn’t too big or you’ll let some of the steam escape. Record the initial temperature of the water. Prepare your retort stand with your ceramic container at the base of the stand. Position…
Method 1. Scissors were used to cut the rubber band, making the rubber band one straight line instead of a circular shape. 2. One end of the rubber band was securely tied to the middle of the skewer. The other end was securely tied to the hook of the 100g slotted steel weight.…
The technique that we will be using in this lab is gravimetric analysis. Gravimetric analysis is a method in which the amount of an analyte, the substance being analyzed in a compound, can be determined through the measurement of mass. For instance, in this experiment, we will use gravimetric analysis in order to determine the amount of water molecules present in a salt hydrate. We will do this by heating the sample of salt hydrate(with water) using a Bunsen burner, which will cause all of the water molecules to dissolve, only leaving the anhydrous(without water) salt. To determine the amount of water molecules that was removed, we will subtract the mass of the salt after water is removed from the mass of the salt before water is removed.…
For a calorimeter, a Styrofoam cup place in a beaker is used. The Styrofoam of the cup minimizes heat loss and the beaker keeps the cup in a stable position. Hot and cold water were mixed in the calorimeter to calibrate it and determine its heat capacity, which comes into play in the three reactions tested.…
Cool water was placed into the calorimeter and its temperature recorded, while an equal weight of water was heated to 35.3 ⁰C. The heated water was immediately poured into the water in the calorimeter and the temperature was recorded. The water equivalent of the calorimeter could then be calculated. Approximately 100 g of cool distilled water was placed into the calorimeter and the initial temperature recorded. Solid sodium sulphate decahydrate crystals of 4.00 g were added to the water in the calorimeter and stirred until it dissolved.…
Bomb calorimeters have to withstand the large pressure within the calorimeter as the reaction is being measured. Electrical energy is used to ignite the fuel; as the fuel is burning, it will heat up the surrounding air, which expands and escapes through a tube that leads the air out of the calorimeter. When the air is escaping through the copper tube it will also heat up the water outside the tube. The change in temperature of the water allows for calculating calorie content of the…
Raj Bose IB Chemistry HL Period 4 15/10/2014 Research Question: How does increasing the concentration of copper (II) nitrate solution in a voltaic cell affect the voltage produced? Variables: Variables Description of the variable Method of controlling variable Independent Concentration of copper (II) nitrate solution used in each trial of the experiment. N/A Dependent The voltage being produced by the two electrodes which is measured by the voltmeter N/A Controlled Concentration of the zinc nitrate solution.…