Carefully determine the mass of the Copper(II) Sulfate, crucible, and lid. 8. Obtain the accepted percent (by mass) composition of water. Pre-Lab Questions 1. Hydrates are crystal solids and water.
However, if the sample does not contain all of these, then it cannot be chromite. Experimental: All participants in the experiment must be wearing safety glasses, long pants, closed toe shoes, and a shirt. The sample may be mineral chromite. Tests should be done to determine if the sample contains magnesium, iron, and chromium (chromite’s components). A spectrophotometer may be used to determine if iron and chromium are in the sample, but magnesium neither absorbs nor emits light energy in the 200-900nm region of the spectrum so it can not be determined by a spectrophotometer.
The copper is then fed to electrolysis for refining. In an aqueous solution copper is dissolved at the anode, the ion moves across the electrolyte to the cathode and plates out. Cu → Cu2+ + 2 e- (anode) Cu2+ + 2 e → Cu (cathode) Aluminum are commercially extracted mainly from bauxite, which is mostly gibbsite (Al(OH)3). The Bayer process is used to refine the bauxite into alumina or aluminum oxide, which
Experimental determination of the formula of Magnesium Oxide Introduction In this experiment, the reaction between magnesium from group 2 (metal) and oxygen from group 6 (non-metal) will be observed. Heated magnesium reacts with the oxygen in the air. They bond to each other by ionic bonding. Magnesium will lose two electrons whereas oxygen will gain 2 more electrons (Mg+2O-2). The aim of this experiment is to find the formula of magnesium oxide.
When aqueous zinc nitrate is reacted with a limited amount of potassium hydroxide, insoluble zinc hydroxide forms. 2 [pic] + [pic] [pic] Zn[pic] [Eq. 1] Zinc hydroxide behaves as a base when it reacts with acids to form salts and water. In a solution containing excess [pic] ions, Zn[pic] acts like an acid and dissolves forming the complex ion[pic]. 2 [pic] + Zn[pic] [Zn[pic]][pic] [Eq.
Name: Date: 17/02/2012 Lab Partner: TITLE: Specific heat capacity of copper INTRODUCTION: We are going to calculate the Specific heat capacity of copper, which means that we’re going to measure how much heat is needed to raise the temperature of 1kg of the substance for one Kelvin. If we know that the specific heat capacity of water is 4.18 kJ it’s possible to calculate the specific heat capacity of copper as well. The only required information we need is the mass and change in temperature both for water and copper. HYPOTHESIS Prediction: I think the specific heat capacity of copper will be pretty low compared to the water’s. Explanation: Because of copper is a good conductor compared to water because the electrons jump from one element to the other more easily in copper than water.
The term Cp is the specific heat of the material (at constant atmospheric pressure). Different materials have different specific heat values. The units of specific heat are : Joules/gram deg – C. In this lab we will find the specific heat value of Zinc and compare it to accepted values.This will do by heating a mass of Zinc up to the temperature of boiling water and placing the hot metal into a cup of cold water. The thermal energy that the zinc loses goes into heating up the water in the cup. By knowing the starting temperatures and the final temperature of the water and the zinc, the specific heat of Zinc may be easily obtained.
The watch glass was removed with the beaker tongs. Using a rubber bulb and a stirring rod to stir the solution continuously, 15.00mL of .25M BaCl2 solution was added to the solution in the beaker. The watch glass is replaced and the solution is keep hot but not boiling for 15 minutes. The precipitate was allowed to settle. When the liquid above the precipitate was clear, the solution was tested for completeness of precipitation when a few drops of BaCl2 solution were added from a pipette.
These power plants produce no pollution (Alexander 1). All of the waste that is created can either be stored away or reused (Epstein 2). There are no smokestacks being spewed into the air, which means that we are not able to breathe in any oxides that may be produced (Alexander 1). The way nuclear energy is being processed is through a process called nuclear fission (Alexander 1). Nuclear fission produces no greenhouse emissions (Alexander 1).
They should also check for potential contaminants after post-production process and deem if the product is acceptable by ISO 9000 standards. Reference to : http://en.wikipedia.org/wiki/ISO_9000 c. Eastern Diary has bad management and a lack of control over its employees. There are no managers or superintendents during the night shift to ensure that the production processes is going smoothly nor is there any authority to oversee and manage its employees. Shutting down the entire production process on the whim of an operator is unproductive and unprofessional even though work is completed at the end of the