Take sample of Zinc Iodide and dissolve in solution. Then, take the battery, with exposed wire tips attached, and place the tips into the solution. In about 1-2 minutes, there should be a red-brown color coming out of one of the wires, and a dark substance depositing on the other wire, these should iodine and zinc respectively. 2. What are the identities of the substances found after electrolysis and heating?
Reactivity of Metals Background Information When a metal (such as magnesium, aluminium, zinc and copper) is mixed with hydrochloric acid, a hydrogen gas is produced. If hydrogen gas is produced, a pop sound should be heard when a flame is held over the substance. On the periodic table the most highly reactive elements are in the first group and the least reactive are in the last group. All metals have the same properties, they are shiny, they conduct heat and electricity, they are malleable which means able to change shape permanently without breaking or cracking, and they are also ductile which means they are able to be deformed without losing their strength. Aim To compare the reactivity of various metals by observing their reaction with hydrochloric acid Hypothesis That the all the metals will produce foam and a pop.
Some mining involves the inadvertent dispersal of heavy metals, such as lead, into the atmosphere. This can have serious health effects 4. What can be done to prevent mine drainage from damaging the ecosystem? Utilize at least one scholarly resource to support your suggestions. Answer = According to World Coal, there are mining
Chlorine gas can be produced in the laboratory by adding concentrated hydrochloric acid to manganese(IV) oxide in the following reaction: MnO2(s) + 4HCl(aq) ( MnCl2(aq) + 2H2O(l) + Cl2(g) a. Calculate the mass of MnO2 needed to produce 25.0 g Of Cl2 ans: 30.7 g MnO2 b. What mass of MnCl2 is produced when 0.091 g of C12 is generated? ans: 0.16 g MnCl2 1. How many moles of ammonium sulfate can be made from the reaction of 30.0 mol of NH3 with H2SO4 according to the following equation: ans.
The Hazards of Welding Fumes for the Different Metals and their Symptoms | In this paper I hope to show some of the hazards that are associated with being exposed to some of the different types of fumes produced while welding. The hazardous effect of welding fumes and gases on a welder's health can vary with the different types of metals, the length, the amount of the exposure, and the specific toxicity of the metals involved. The welding process involving stainless steel involves, cadmium- or lead-coated steel, or metals such as nickel, chrome, zinc, and copper can be hazardous as the fumes produced have a higher toxicity level than those which a welder breaths when welding mild steel. Mild steel will consists mostly of iron, carbon, and small amounts of manganese, phosphorous, sulfur, and silicon. While stainless steel consists’ mainly iron, chromium, nickel, titanium, and manganese.
6. Describe the way in which the above named industrial and medical radioisotopes are used and explain their use in terms of their chemical properties. Cobalt-60 is used in industrial radiography to inspect metal parts and welds for defects. Beams of radiation are directed at the object to be checked from a sealed source of Co-60. Radiographic film on the opposite side of the source is exposed when it is struck by radiation passing through the objects being tested.
It cannot be found as a native metal in nature, The Social benefits and limitations of Zirconium Zirconium is used primarily as an alloying agent because it is highly resistant to corrosion from alkali, salt water, acids and many other possible sources of corrosion. Because of this it is often used in alloys that are used in objects exposed to acids a lot, such is surgical apparatus. This makes hospitals a safer place, because it reduces the chance of acid breaking or damaging tools, which in turn could result in patients getting injured. On the downside, powdered zirconium is highly flammable, and it can cause a type of tumor caused by inflammation or injury called a granuloma. This means that it can be very dangerous if kept in powdered form.
Unit 3003 1. Sustainable Materials Materials | Sustainability | Where They May be Used | Polystyrene | * Petroleum-based Product * Can Be recycled * Pollution caused through manufacture * High Insulation properties | This product is mainly used as packaging for many different products | Polyurethane | * Made From Volatile organic compounds that damage the environment * Often turned into foams * Gives off harmful chemicals when burned * Disposal issues: if the foam catches fire, it causes pollution and produces carcinogenic gases | Polyurethane sealants are used to fill gaps thereby preventing air and water leakage. They are also used in conjunction with inorganic insulation, such as Rockwool or ceramic fibres, for fire stopping. | Softwood | * Can Be Recycled into other products * A managed resource that can be grown over and over again * Provides a pollution filter, takes in carbon dioxide and produces oxygen * A natural green product * Require treatment to prevent rot | Can be Used for many things. And Made into different things | Hardwood | * Forms part of a tropical rainforest * Intensively felled * Takes a longer time to re-grow the softwood * Expensive resource | As Above | Concrete | * Cement production causes Co2 emissions * Disposal issues – can only be crushed and used as hard-core * Hardwearing with a long lifespan * Relies on a lot of formwork and flasework | Mass concrete structures: These large structures typically include gravity dams, such as the Hoover Dampre-stressed concrete structures: Pre-stressed concrete is a form of reinforced concrete that builds in compressive stresses during construction to oppose those found when in use Concrete textures: concrete can be cast and moulded into different textures and used for decorative concrete applications | Common Brick | * Manufacture
Secondly, there is excessive disposal, mainly caused by the geology, making many sites suitable for landfill. Landfill sites also produce gases including carbon dioxide and methane which contribute to global warming, making it very unsustainable. Toxic leachate may occur, which will inevitably harm animals and water courses. Although this is very unsustainable, the waste can be incinerated to produce energy (leading to less stress on other resources, therefore more sustainable), but there is concern on whether this acts as a carcinogen which can lead to the formation of cancerous tissues, still making it
Benzene has been known to be a carcinogen, while the rest of the chemicals are unknown what long term damage it could cause. Another danger of fracking are spills. Spills occur during the adding of the fluids as well as during the results of the flow back. Drill operators will eventually have spills throughout this process. Hoses can be undone, gaskets can fail, pits leak and liquids always hit the ground, repeatedly in large quantities.