You will observe in this experiment some of the characteristics of the alkaline earth metals discussed here and will write balanced equations for all reactions. Purpose: Investigate some reactions of some group 2 elements and gain some insights into the properties of these alkaline earth metals. Equipment: (pg 131) Materials: (p 132) Safety: • Avoid skill and contact with your skin • Tie back long hair • Wear safety goggles Procedure: (record all data in the observations and data section) Part A 1. Pour 5 ml of distilled water into a clean and dry test tube and put the test tube into on the test tube rack. Add a calcium turning to the water in the tube.
Mix pairs of solutions in the following ways, and record all of your observations in the data table. System 5: FeCL3 + KSCN System 6: Fe CL3 + AgNO3 System 7: FeCL3 + K4Fe(CN)6 Part B: Reactions of Acids To four of your calibrated test tubes, add 3-ml of hydrochloric acid, and to four different test tubes add 3-ml of HNO3.…Test the reaction of the acids to litmus paper by dipping a glass rod into the test tube containing the acid you are testing and touching it gently to both the blue and red litmus paper. Record observations in the data table. Make sure you rinse off the
Gently stir the pellets until the acid is dissolved by shaking the the apparatus. Lift the calorimeter lid and wash out its contents and the thermometer. Repeat this experiment using 50.0 mL of 1.0M acetic acid. Repeat experiment using 25.0 mL of each 2.0M sodium hydroxide and 2.0M acetic acid. Data Table(s): Reaction equation Mass of solid NaOH Initial Temp.
• After the flask was heated, I removed it from the heating mantel and allowed it to cool to room temperature. • Next, I poured 15mL of absolute ether and 9mL of bromobenzene into the 250mL flask and waited 5 minutes for any reaction. • There were no signs of reaction after 5 minutes; therefore the lab assistant used a glass stirring rod to crush the magnesium in order to get the reaction started. When this was done, the liquid became cloudy, rapidly bubbling, and the color turned rusty red. • Next, I added 25mL of absolute ether and attached a reflux condenser to the flask.
It burns in air with a brilliant white light, and for this reason is often used in flares and fireworks. When magnesium is in its metal form it will burn very easily in air. However, in order to start the reaction (the burning) the magnesium metal needs a source of energy. The flame provides a source of heat so that the magnesium metal atoms can overcome their activation energy. Activation energy is the minimum energy required in order for a chemical reaction to proceed.
Web. 27 Jan. 2011. <http://sprayberry.moodlehub.com/file.php/12/Chem/Labs/FormulaOfHydrateLab_woc_032.html>. Procedure; Data/Observations: The purpose of this lab is to determine the molar ratio if water to copper (II) sulfate in blue copper (II) sulfate hydrate crystalline salt. First, all the materials were received and placed together as shown in the diagram: Bunsen burner, Crucible, Crucible Tongs, Clay Triangle, and Ring Stand.
Chose and Obtain Sulfate Solution will form aqueous compound as sulfate when combined with anything is aqueous · Is an anion 3. Chose and Obtain Nitrate Is an anion · Need another anion to test and see if order of reactivity is correct for each anion Solution will always form an aqueous compound according to Alchem Table 4. Chose and Obtain Copper Used by different lab partners whose data was observed Carrying Out The Reactions & Collecting Data How Why 5.Place 10ml of water in a test tube Done so aqueous solution may be made 6. Take magnesium nitrate and place 3 drops into test tube with water Done to have one part of the reaction 7. Repeat step 5 and 6 but replace magnesium with zinc Done so 2 metals can be tested at the same time 8.
Report Submitted: September 22, 2013 Title: Properties of Gases Purpose: To investigate some physical and chemical properties of gases. Procedure: Explored physical and chemical properties of gases and used these properties to identify the gases and when they were present 1. Hydrogen: B. Observation of placing Zinc into HCI was the appearance of gas bubbles rising to the surface 2. Oxygen: B. Reacts the same as hydrogen with gas bubbles rising to the surface.
2. Place about 0.5mL (20 drops) of sodium nitrate in the first well of your well plate. 3. Place the chemical container in the well below the chemical to keep track of which chemical is where. 4.
So: mc(T1-T2)=MwCw(T2-Tw) Cw and c are the specific heats of the the water and material. Procedure: We had three different metals (aluminum, steel and brass) for this lab. We first boiled 1000g of water in a beaker on the hot plate and then submerged the metal object into the heated water. After allowing time for the metal to absorb the heat we removed the object and placed it in 100g of room temperature water in plastic cup. After shaking the cup gently to ensure that the mixture reached the equilibrium temperature quickly, we measured the final temperature to get the ‘T2' value.