Sunday, February 24, 2019
Sulfuric acid
The resulting hog (II) sulfate firmness when cooled support slowly crystallisationlize which is in the solid form and the amount of crossing can be accurately measured by use electronic equilibrate 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 overlap that we want and the actual yield is always less than the theory-based determine 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 in truth hard to get a 100% yield throughout the experiment. impersonal To make a salt and to calculate the percentage yield of the salt. Reagents & mechanism 20 ml Sulfuric blistering MM, g Copper (II) change, bunsen burner burner, Tripod stand, Gauze, White tile, Filter funnel and filter paper, Glass rod, 100 ml Glass beaker, Conical flask 250 ml Petri dish, Bal ance Spatula, Procedure peak 1 1 Add 20 ml MM sulphuric 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 slovenly person (II) carbonate into the beaker. The reaction is exothermic, so be careful when adding the solid. Stir the cockture thinly for about half a minute after each addition. 4 When all the copper (II) carbonate has been added, allow the beaker to cool slightly stave set up Stage 2. Stage 2 5 obstruct a filter paper to fit into a filter funnel, and barf it in the funnel. Place the funnel in the neck of a conic flask. 6 When the beaker is cool enough to hold at the top, pour the circumscribe 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 top into it. Boil the solution until the volume is hal f the original volume. Cool the solution. 8 Obtain the mass off dry out Petri dish label it with your sort out 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) coloring material Green Blue 2 Describe your crystals.The crystal formed is in blue rhombic shape. 3 Mass of the dry crystals = 3. Egg vigilance steps 1 . The position of eyes must be plumb line to the scale of measuring cylinder to avoid parallax error. 2. Stir the mixture light to ensure the copper(al) carbonate, is fully reacted with sulphuric 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. gram moleculel -0. 02 x (249. 5) = 0. Mol -?4. Egg Mass of the crystal () 2 Calculate the percentage yield. fate yield = x 100% = x 100% = 63. 93% 3 a) Is it possible to prepare copper (II) sulfate if we demoralize 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 alter with filter paper. B) Is it possible to prepare copper (II) sulfate if we start with copper surface and sulfuric acid? If so, describe the procedure. No, because the position of copper ion is cut down than hydrogen ion in electrochemical series . Hence, it doesnt react with acid. Conclusion As the conclusion, it shows that salt can be made by reacting acid with metal carbonate together.
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