The variable being manipulated is the reaction between 2 g of solid copper (II) sulfate pentahydrate and 2 mL of 6 molar hydrochloric acid with approximately .25 g of aluminum foil being conducted in a real lab in addition to theoretically on paper, where the reactants are expected to create the product of an acidic, aqueous solution of copper (II) sulfate pentahydrate. Dependent Variable The variable being measured is the amount of aqueous copper (II) sulfate pentahydrate produced from the reaction between solid copper (II) sulfate pentahydrate and aluminum foil, which will be measure in grams using a scale. Controlled Variables Throughout the duration of the experiment, the amounts of reactants used theoretically and physically will …show more content…
Copper (II) sulfate pentahydrate by itself, as a solid, is used for both treating phosphorus poisoning and algae-growth prevention. It is a “sulfate salt of copper” (CID=24463). Aluminum is a metal used often in daily life in such items as foils and kitchen supplies due to it being non-toxic, as well as very malleable and ductile (Aluminum). Reacting these two reactants together is done with the intention of producing copper, which is a metal often used to make coins, preventing the growth of algae, and electronic equipment (Copper). Placing them into the hydrochloric acid will speed up the process as it is a catalyst to the …show more content…
This equation will provide for the ability to calculate the moles of both the given and desired substances, which can be divided to find the theoretical yield. An experiment will then take place: first, it is important to properly clean a working station and to wear goggles and a lab coat. A beaker can then be filled with 10 mL of of water before gathering 2 g of solid copper (II) sulfate pentahydrate, 2 mL of 6 molar hydrochloric acid, and approximately .25 g of aluminum foil as provided; a scale can be used to keep these measurements accurate. Using a stirring rod, stir the hydrochloric acid into the water before placing the solid copper (II) sulfate pentahydrate into the beaker of water. Let the hydrochloric acid and solid copper (II) sit in the water for two minutes as the next portion of the experiment is prepared. Heat up a heating pad to 275 degrees °F before placing the beaker on top of the heating pad. Using a pair of tweezers, carefully drop the pieces of aluminum foil into the water. Allow mixture to sit on the heating pad until dissolved, constantly stirring. Once completed, turn the heating pad off. Measure the beaker on the scale once more and subtract the weight of the 10 mL of water as well as the measurement of the
The purpose of the lab is to acquire the percent composition of zinc and copper. The procedure included obtaining a post 1983 penny and washing it with soap and water. Using a triangular file, we made an X on the penny. Then, we cleaned the top and bottom of the penny with steel wool until it was shiny. We rinsed the penny in acetone and dried it with paper towel.
Put the foil into a 250 mL beaker. Get 25 mL of 3M KOH solution, add 5 mL KOH solution into the beaker and stir the beaker. Keep the reaction proceeding until all of the foil is dissolved and use ice bath to make it cool down. Pour the reaction mixture through Buchner funnel and filter flask setup, rinse the filter paper with a small amount of distilled water. Wash the beaker with distilled water and run the rinse solution through the Buchner funnel.
Identify the independent Variable Size of the tablet Identify the dependent Variable Reaction time List the controlled variables The solution (water), temperature, volume of water (200 mls) The amount of Alka- Seltzer How will the dependent variables be measured A stop watch will be started as the pieces of Alka-Seltzer are dropped into 200ml of room temperture water Describe the expected results if the hypothesis is true The 3 smaller pieces of Alka Seltzer will dissolve quicker than the ½ tablet .
The independent variable is the water source (lake) and the dependent variable being the amount of complete, reduced, or absent pelvic structures found in the fish. Also, the experiment contained a constant: the number of fish collected per lake (20). Secondly, the experiment contained lots of data and is
This lab’s end result was to correctly identify each unknown solution using prior knowledge of chemical properties and the results of the first experiment conducted. Unknown solution D was the only colored solution, being blue while the others were clear. This made it easy to then match D up to Copper Sulfate because of its color. As unknown A and B were added together, lots of gaseous bubbles formed and revealed the fact that that reaction was the reaction between Hydrochloric Acid and Sodium Carbonate because it was the only reaction that produced a gas release. Unknown A and C produced the only yellow, brown precipitate just as the reaction between Sodium Carbonate and Silver Nitrate had previously.
Explain why the reaction between sodium sulphate and silver nitrate did not occur even though sodium sulphate is insoluble in the most part? The reaction did not occur because the solution was mixed with 0.1M of silver nitrate and 0.1M of silver nitrate is not strong enough for the reaction to occur. If silver nitrate contained more than 0.1 mole, the reaction would have occurred because silver sulphate is insoluble and is a solid. Why is it needed for barium nitrate and ammonium sulphate to dissolve into water separately first before mixing the two together?
Purpose: The purpose of performing the 2 gram lab was to obtain 2.00 grams of our solid product, barium sulfate. In order for barium sulfate to be a product, we decided to perform a double replacement reaction. Background: In order for barium sulfate to be a product, we decided to perform a double replacement reaction.
Weighed 1 gram of NaC2H3O2 and mixed it with ionized water. Boiled 12 mL of 1.0M Acetic Acid added into a beaker containing the sodium carbonate on a hot plate until all the liquid is evaporated
The independent variable is the baking soda and vinegar react. My control conditions are a water bottle that is about 8 inches in height and about 3 inches in width and I will use about 6 grams of baking soda and ½ a cup of vinegar. I will put protective glasses to avoid damage to my eyes and I will first pour the vinegar
Introduction: The purpose of this experiment is to demonstrate the different types of chemical reactions, those including Copper. There are different types of chemical reactions. A double displacement reaction is a chemical process involving the exchange of bonds between two reacting chemical species. A a decomposition reaction is the separation of a chemical compound into elements or simpler compounds and the single-displacement reaction is a type of
The percent recovery of the copper was calculated using the equation, percent recovery = (the mass of the copper recovered after all the chemical reactions/the initial mass of the copper) x 100. The amount of copper that was recovered was 0.32 grams and the initial mass of the copper was 0.46 grams. Using the equation, (0.32 grams/0.46 grams) x 100 equaled 69.56%. The amount of copper recovered was slightly over two-thirds of the initial amount.
VARIABLES: There are independent variables, dependent variables, and controls. the one that is being tested and the one that is the inconsistent variable in the Independent variable like the volume and surface area of the agar cubes. The variable that is kept consistent is the dependent variable such as the percentage of diffusion of pigment in the agar cubes. The constant variable is the features of the experiment that is kept the same throughout the entire experiment such as, the amount of time the agar cubes are left in the beaker and the amount of acid in the beaker.
1. (a) Identify the variables that the student will need to control in this experiment. The variables that will need to be controlled in this experiment are the amounts of water used per set of three bean seedlings that are growing in large pots containing potting mix. (b) How can she ensure that all the seedlings receive the same amount of sunlight and experience the same air temperature?
The chemical equation for this experiment is hydrochloric acid + sodium thiosulphate + deionised water (ranging from 25ml to 0ml in 5ml intervals) sodium chloride + deionised water (ranging from 25ml to 0ml in 5ml intervals) + sulphur dioxide + sulphur. As a scientific equation, this would be written out as, NA2S2O3 + 2HCL + H2O (ranging from 25ml to 0ml in
Thermometer Scale Discussion: In chemistry, a chemical reaction is the process by which one or more initial substances change into a new substance through a process of chemical changes. There are multiple indicators that a chemical reaction has occurred such as, temperature change, color change, gas production, and the formation of a precipitate. However, while these are good indicators the best way to determine whether a chemical reaction has occurred is through a chemical analysis. Procedure: Safety Notes: Dress appropriately with long sleeves, long pants, and close toed shoes