Detecting Signs of Chemical Change Abstract: The objective of this experiment will be to combine various substances, liquids and metals, and to observe their behavior when they are combined. The types of reactions observed shall determine the nature of these reactions: physical or chemical. Introduction: An elements¡¦ reaction to certain substances may be predicted by its placement on the Periodic Table of Elements. Across a period, an element on the left will react with more vigor than one on the right, of the same period. Vertically, as elements are sectioned into groups, the reaction of each element increases as you move down in the same group. With this in mind, the reactions of the substances involved in this experiment may be hypothesized, observed, and validated. Material and equipment: X 12 test tubes X 10-mL graduated cylinder X Water ¡V deionizer (distilled water) X 0.1M cobalt (II) chloride hexahydrate X 95% ethanol X 0.1M cobalt (II) chloride hexahydrate dissolved in 95% ethanol X zinc X 1M hydrochloric acid solution X 0.1M copper (II) sulfate solution X 0.5M sodium hydrogen carbonate solution X 1M ammonia solution X magnesium X 1M sodium hydroxide solution X ammonium chloride Procedure: A. Be sure to always start with clean, dry test tubes, equipment, and tools. B. Put a label on each test tube. With a pencil, number each test tube from one to twelve. C. For this experiment, you will add the measured amount of the first sample to the measured amount of the second sample into its respectively labeled test tube then observe if a reaction occurs. In your Data Table, record the samples added to each test tube, describe the reaction observed, if any, and whether or not a chemical reaction took place. D. Put on your safety glasses and let¡¦s begin: 1. Put the amount of 0.1M cobalt (II) chloride hexahydrate that fills the end of a spatula into a test tube. Then add 2mL of 95% ethanol. Tap the end of the test tube to mix the solution and record the pertinent data in section 1 of the Data Table. Discard the solution in the appropriate container as directed to you by your lab instructor. 2. Put 1mL of 0.1M cobalt (II) chloride hexahydrate dissolved in 95% ethanol into a test tube. Then add 1mL of deionized water. Tap the end of the test tube to mix the solution and record the pertinent data in section 2 of the Data Table. Discard the solution in the appropriate container as directed to you by your lab instructor. 3. Put a sample of zinc into a test tube.
We used the pipette filler and filled the glucose rinsed pipette to add 10ml of 10% of glucose in test tube 0.
3.) Divide your 30g of white substance into the 4 test tubes evenly. You should put 7.5g into each test tube along with the water.
Experiment: First prepared a well plate with the appropriate amounts of distilled water, HCl, and Na2S2O3 in each well according to the lab manual. The well where the reaction
The procedure of the lab on day one was to get a ring stand and clamp, then put the substance in the test tube. Then put the test tube in the clamp and then get a Bunsen burner. After that put the Bunsen burner underneath the test tube to heat it. The procedure of the lab for day two was almost exactly the same, except the substances that were used were different. The
The first test was to put 5 drops of the distillate into a test tube
Adding the sample to chromatography column uses a careful technique. The solvent should be added so that it is just below the top of the packed column. With the stopcock closed and after the stopper is removed at the stop of the column and the clamp on the tubing at the top of the column is closed, the sample solution can be added carefully. The clamp on the tubing is opened so that the sample can go through the column until it is right below the top of the column. The packed column should not be disturbed as the sample is poured in. Once the clamp is closed again, a little bit of solvent is added. The clamp is opened so that the solvent can run through, and then again the clamp is closed and more solvent is
In order to find a good set of results for this experiment I need to
Prepare a 1% salt solution for the chromatography solvent. Add 1/8 teaspoon of salt to 3 cups of water ( 1g of salt to 1L of water). Shake or stir until the salt is completely dissolved.
The procedure is very short. First, I constructed the data table. I then massed one piece of Aluminum foil and record it in the data table. Next, pour 25.0 mL of 0.400 M Cu²+ solution and tear up the massed piece of foil. Drop the torn pieces in the solution and record the observations. Mass the other pieces of Aluminum foil, tear it up, and drop it in 25.0 mL of the 0.200 M Cu²+ solution. Record observations and clean up according to the teachers
As mentioned before, there are no relationships between these two elements, but the elements can be found everywhere in everyday life. So, next time an individual heats up the barbecue, or opens a can of soup, think about the reaction occurring with each element.
second test tube also add 6 mL of 0.1M HCl. Make a solution of 0.165
A great portion of analytical chemistry is dealing with a compound or substance and examining its composition and structure (Analytical Chemistry, n.d.). Often times, when dealing with chemistry people have a compound that is made up of several different components and only want to know about one specific component present. There is an abundant of different methods that can be utilized to isolate specific components. The purpose of this lab is to utilize one of those methods, titration, and determine how much carbonate is present soda ash, sodium carbonate.
2) A several drops of bromine water was added from a dropper bottle to the test tube and the test tube was shaken well.
acid and water to see how it affects the rate of reaction. I will use
In this experiment three different equations were used and they are the Stoichiometry of Titration Reaction, Converting mL to L, and Calculating the Molarity of NaOH and HCl (Lab Guide pg. 142 and 143).