Introduction: Corrosion of iron causes many problems around the world. Many things that made up of iron metal like cars, bridges, ships and houses can be destroyed if the metals have been corroded. There are many ways to make the corrosion happen. Iron will be oxidised when it’s been exposed in the air for a long time and react with oxygen and water to make the iron rust. Higher temperature can speed up the rusting as well as the acidic liquid that presents on the surface of the metal. Acid rain could be one of the sources of the acidic liquid. For acid, the strong acid donates more protons H+ in the reaction so the iron will react with the hydrogen quicker to speed up the corrosion. The rusting forms because iron has been oxidised, so with acids there won’t be a layer of rust on the surface of the iron metal. In this practical, the corrosion that cause by acid will be investigated. …show more content…
Iron nails, choose iron nails with the same size and shape. Concentration of the acids, all the acids should have the same concentration (1mol/L). test tube should be in the same size.
Hypothesis: Sulphuric acid will speed up the corrosion of iron nails than other acids.
The procedure of the lab on day one was to get a ring stand and clamp, then put the substance in the test tube. Then put the test tube in the clamp and then get a Bunsen burner. After that put the Bunsen burner underneath the test tube to heat it. The procedure of the lab for day two was almost exactly the same, except the substances that were used were different. The
To understand the roots and impacts of racial profiling and the iron triangle, it is beneficial to know exactly what racial profiling and the iron triangle entails. Racial profiling is the act when any kind of law enforcement officer forms suspicious thoughts about a person due to nothing besides their race or ethnicity. Law enforcement officers often act on these suspicious thoughts due to their training. An example of racial profiling could be made of a woman named Shoshana Hebshi, who is of Jewish and Arab descent who was jerked off of a plane and heavily searched during the ten year anniversary of the 9/11 attacks. Hebshi, an American citizen, was completely innocent and was only brought under suspicion due to her race. Therefore,
It takes a lot of effort to be able to understand another person’s feelings and motives in life since we live in such judgmental society. “Empathy is a virtue that not all people may have”. Social division amongst the great nation was at its peak during the time throughout expansion of the Industrial Revolution. In “Life in the Iron Mills,” Rebecca Harding Davis unveiled the dehumanization and oppression of the factory workers and their families. She vividly revealed the communal conditions immigrants endured even though they were the ones that constructed the supplies that aided American in its building of a new nation. Davis intensely exemplifies the separation between the American classes. As the affluent citizens lived in entirely separate
Iron is a trace element, which is a group of minerals present in small quantities in the body. Other trace elements include copper, zinc, selenium, manganese and iodine. These minerals cannot be synthesized by the body and must therefore be supplied in the diet. Iron is the most common trace element in the human body; adult males have approximately 3.5 g iron in total, or 50 mg per kg body weight while females have about 2g total iron or 35 mg per kg bodyweight. Iron can exist in oxidation states from -2 to +6, but mainly exists in the ferrous (+2) and ferric (+3) states in biological systems. As iron has the ability to accept and donate electrons readily, it can interconvert between these two forms with ease. Thus, iron can participate in
Planning Firstly here is a list of equipment I used. Boiling tubes Weighing scales Knife Paper towels 100% solution 0% solution (distilled water) measuring beakers potato chips Cork borer. We planned to start our experiment by doing some preliminary work. We planned to set up our experiment in the following way.
Iron is called a trace mineral, but its effects are mighty. We need it to produce hemoglobin, the oxygen carrier in red blood cells that brings oxygen to the rest of the body. Iron is also needed to produce myoglobin, the oxygen reservoir in the muscle cells.
Put a label on each test tube. With a pencil, number each test tube from one to twelve.
This would not only allow me to compare the nails in the box alone, but compare them to other nails from other stores that were galvanized the same and galvanized differently. I would be interested in knowing more about the purpose of the zinc on the nails as well as why there is a standard of how much zinc should be on a nail.
I am going to use a range of concentrations to enable me to get a good
3.) Divide your 30g of white substance into the 4 test tubes evenly. You should put 7.5g into each test tube along with the water.
I. Martensitic stainless steels have good mechanical strength and are moderately corrosion resistant. Because of their excellent corrosion resistance and mechanical strength, martensitic stainless steels are used for manufacturing the steam turbine blades, heat exchangers, automotive components and structures, petrochemical & process piping. Properties of martensitic stainless steel can be changed by the heat treatment. Increasing productivity of any welding process while maintaining or even improving the weld quality has been the task of researchers in the field of development of welding processes. Over the years, welding methods and techniques have developed to great extent [3].
== § Test tubes X 11 § 0.10 molar dm -3 Copper (II) Sulphate solution § distilled water § egg albumen from 3 eggs. § Syringe X 12 § colorimeter § tripod § 100ml beaker § Bunsen burner § test tube holder § safety glasses § gloves § test tube pen § test tube method = == = =
Stainless steel is a type of alloy that has a very strong lattice structure (an arrangement/ shape of the crystals or other objects) which in some case can be more beneficial than others depending on the type of application it may be used for. In many cases this structure will make the material more suited to being used in engineering applications such as tools for instance a hammer (stainless steel alloys) , also they can be used for gears, engines, electrical motors and hydraulic systems because the structure makes the material so strong. So when the arrangement of the structure is as above it makes the overall material even stronger which makes it a good for all the applications stated above. I believe its strength and durability are its main properties as these are commonly needed in the engineering industry, although it is also very well known to be used for its corrosion resistance as it is resistant to many types of corrosion. It is used for these properties because the components such as gears need to be strong in order to keep transferring and altering the rotary motion and torque exhibited in the machine that it may be used in, durable to withstand any loads or pressure put onto it and also corrosion resistance to give the components a bigger life span and increase its rate of work throughout its required use.
Prepare the nails by removing any old nail polish present on the nail. Clean the nails with hand sanitizer.
tube. Add 6 mL of 0.1M HCl to the first test tube, then 0.1M KMnO4 and