Try to count the grains of copper sulfate so that you are adding close to the same amount to each reaction.…
(Mass of dried copper + mass of watch glass + mass of filter paper) – (Mass of filter paper) – (Mass of watch glass) = (Mass of elemental…
5. The difference in mass of isotopes of the same element is due to the different number of…
2) Use the formula shown below to calculate the “percent of recovery” of copper for your experiment.…
In this experiment, we were able to see that some residual reagent left over from other steps can damage the results. The value was higher than the literature value, most likely due to contamination from previous steps. To get rid of this in the future, it is important to let crystals dry all the way after a suction filtration, in order to make sure no residual is left on them. Also, be sure to let everything dissolve completely, which might have been a problem since time was running short.…
What happens to the mass of the copper carbonate when it is heated? Give a conclusion, which describes why the mass of copper carbonate may have changed during your experiment.…
Through the possible reactions, one of the best way to determine which one is the correct reaction pertaining to the lab is limiting reagent analysis, where mass of copper is quantitatively determined or by observations. Through the process of weighing by difference as suggested by the lab manual, anhydrous copper sulfate and iron powder were weighed out. Anhydrous copper sulfate was then dissolved in water on a hot plate and iron was added after the solution of copper sulfate had cooled down to room temperature. The addition of iron took place under the fume hood so as to avoid inhalation of sulfur fumes which were released as a side-product of this reaction. Copper precipitate was then collected by the use of a vacuum…
Copper Cycle Summary During the copper cycle lab, my partners and I performed a series of reactions on copper powder and observed the changes it underwent. For the first step, we mixed nitric acid and copper powder, and noticed that a yellowish brown gas emerged, along with effervescence. The red solid disappeared and became a blue liquid.…
To find the percent yield, we first need to determine the theoretical yield of copper (Cu) based on the given mass of copper sulfate ( 4) reacted to. Calculate the molar mass of 4 and Cu to find the stoichiometry of the reaction. Convert the given mass of 4 to moles using its molar mass. Use the stoichiometry of the reaction to determine the theoretical yield of Cu in grams. Utilise this formula to determine the yield percentage.…
My percentage yield is actually quite close to a perfect percentage yield, which I am pleased about. The theoretical vs actual in this experiment is so close where the possible sources of error are quite slim in this case. It is always possible that all of the substance from the beaker was not accurately weighed due to some CaCO3 reside being left on the sides of the beaker.…
Copper is find in ores, an ore is a type of rock that contains minerals with important elements including metals, there is a lot of different copper ores such as Chalcopyrite, Covellite, Malachite, Azurite:…
We recovered 54.9%. We did not recover as much copper, one of the problems may have been made when drying the copper, and not letting enough of the water evaporate, and this could lead to a falsely low percent recovery.…
In order to create successful chemical reactions, we followed the procedures properly. We started with a small amount of cooper powder in a beaker, and added nitric acid to it while the beaker was under a fume hood. We removed the beaker as soon as it was safe to and next we added 25mL of water to the current blue solution. We then added sodium hydroxide to the beaker and then proceeded to place the beaker on to a hotplate and stir the solution with a stirring rod. We then removed the beaker with tongs off of the hotplate and filtered the solution with a filter paper and funnel. The next day, after the solid had dried onto the filter paper, we scraped the solid off and into the beaker with a spatula. We then added sulfuric acid and zinc, respectively, into the beaker. We stirred the solution and our final step was getting rid of the liquid waste and observing the copper powder at the bottom of our beakers.…
* Functional departmentalization - Grouping activities by functions performed. Activities can be grouped according to function (work being done) to pursue economies of scale by placing employees with shared skills and knowledge into departments for example human resources, IT, accounting, manufacturing, logistics, and engineering. Functional departmentalization can be used in all types of organizations.…
Q.4 You are a team manager having 15 members in your team. Two of your key team members are on 3-weeks leave. You have to call for a monthly team meeting within a week. How effectively you would plan and carry out this meeting? (10 marks)…