Sulfuric acid

The resulting copper (II) sulfate solution when cooled can easily crystallize which is in the solid form and the amount of product can be accurately measured by using electronic balance to get the mass of the The experiment is carried out to calculate the percentage crystal formed. Yield of the salt formed. The percentage yield is the percentage of purity of the product that we want and the actual yield is always less than the theoretical value as there are many factors to affect the purity Of the product such as environmental factor, systematic error, random error and others.Therefore, it is very hard to get a 100% yield throughout the experiment. Objective: To make a salt and to calculate the percentage yield of the salt. Reagents & Apparatus: 20 ml Sulfuric acid MM, g Copper (II) carbonate, Bunsen burner, Tripod stand, Gauze, White tile, Filter funnel and filter paper, Glass rod, 100 ml Glass beaker, Conical flask 250 ml Petri dish, Balance Spatula, Procedure: Stage 1 1 Add 20 ml MM sulfuric acid in a 100 ml beaker. Heat carefully on the tripod with a blue flame until nearly boiling. 2 When the acid is hot enough, turn off the Bunsen burner and stand the beaker on a white tile. Use a spatula to add small portions of copper (II) carbonate into the beaker. The reaction is exothermic, so be careful when adding the solid. Stir the mixture gently for about half a minute after each addition. 4 When all the copper (II) carbonate has been added, allow the beaker to cool slightly; meanwhile set up Stage 2. Stage 2 5 Fold a filter paper to fit into a filter funnel, and put it in the funnel. Place the funnel in the neck of a conical flask. 6 When the beaker is cool enough to hold at the top, pour the contents into the filter paper in the funnel. Gently swirl the contents to mix; allow to filter through. Rinse the beaker and pour the Lear blue solution back into it. Boil the solution until the volume is half the original volume. Cool the solution. 8 Obtain the mass off dry Petri dish; label it with your group number. Carefully pour the warm solution into the dish and leave aside for a week. 9 After one week, obtain the mass of the dry crystals. Result : 1 What was the color of copper (II) carbonate? What was the color of the solution produced after the reaction? Before reaction (Copper (II) Carbonate) After reaction (Copper (II) Sulfate) Color Green Blue 2 Describe your crystals.The crystal formed is in blue rhombic shape. 3 Mass of the dry crystals = 3. Egg Precaution steps : 1 . The position of eyes must be perpendicular to the scale of measuring cylinder to avoid parallax error. 2. Stir the mixture gently to ensure the copper(al) carbonate, is fully reacted with sulfuric acid, 3. Handle the acidic solution using gloves to avoid the acid from splitting to the hands. Discussion: 1 Calculate the theoretical yield of crystals that could have been made. + (as) (as) +(l) + (g) = ml=20 =o. Moll -0. 02 x (249. 5) = 0. Mol -?4. Egg Mass of the crystal ( ) 2 Calculate the percentage yield. Percentage yield = x 100% = x 100% = 63. 93% 3 a) Is it possible to prepare copper (II) sulfate if we start with copper (II) oxide and sulfuric acid? If so, describe the procedure. Yes, it is possible to prepare copper (II) sulfate if we start with copper(al) oxide and sulfuric acid. To prepare copper (II) sulfate , prepare of the O. MM sulfuric acid and pour portions of copper(al) oxide is added to the beaker until excess. Stir the mixture and pour into the filter funnel.The filtrate is then heated until the illume becomes half and cools the solution to crystallize. The crystal which is copper (II) sulfate will be formed. The crystal is then rinsed with water and dried with filter paper. B) Is it possible to prepare copper (II) sulfate if we start with copper metal and sulfuric acid? If so, describe the procedure. No, because the position of copper ion is lower than hydrogen ion in electrochemical series . Hence, it doesn't react with acid. Concl usion: As the conclusion, it shows that salt can be made by reacting acid with metal carbonate together.