Manufactured Substances in Industry

Iron Based Alloy Examples of iron base alloy are steel stainless steel manganese steel The iron base alloys are usually very hard Steel  Component: Fe 99%, C 1% Applications: Vehicles, ships, bridges, buildings Stainless steel Component: Fe73%, Cr 18%, Ni 8%, C 1% Applications: Kitchen appliances, watches, machine parts, knives, forks, spoons Manganese steel Component: Fe 85%, Mn 13.8%, C … Read more

Copper Based Alloy Examples of copper base alloy are Cupro-nickel Bronze Brass Most copper base alloy has shiny surface Cupro-nickel Component: Cu 75%, Ni 25%Applications: Coins Bronze Component: Cu 90%, Sn 10%Applications: Decorative items, medals, artwork, pots and pans Brass Component: Cu 70%, Zn 30% Applications: Decorative items, electrical appliances, musical instruments, bell, nails, screw, pots

An alloy is a mixture of two or more metals mixed in a certain percentage. Most pure metals are weak and soft. The properties of pure metals can be improved by making them into alloys. Alloys are made to increase the hardness of metals.Example:Magnalium is made from aluminium and magnesium to improve the hardness of … Read more

Ostwald Process Introduction Industrially, nitric acid is made by the catalytic oxidation of ammonia over heated platinum.  Oxidising ammonia produces oxides of nitrogen which can then be dissolved in water to produce nitric acid. Reaction Initially, nitrogen(II) oxide will be formed from the catalytic oxidation of ammonia using the transition metal platinum.Ammonia + Oxygen → … Read more

Characteristics of Ammonia Ammonia gas can turn a moist red litmus paper to blue. As an alkali, ammonia can react with acid to form salt and water.ExampleH2SO4(aq) + 2NH3(aq) → (NH4)2SO4(aq)HNO3(aq) + NH3(aq) → NH4NO3(aq)H3PO4(aq) + 3NH3(aq) → (NH4)3PO4(aq) Ammonia dissolve into water to form ammonium and hydroxide ion.NH3 + H2O→ NH4+ + OH– The hydroxide ion can react with … Read more

Haber Process Ammonia is manufactured in industries through Haber Process. In the Haber process, nitrogen gas, N2 from the air is mixed with hydrogen gas, H2 derived mainly from natural gas. The mixture is compressed to a high pressure of 200 atmospheres at a temperature of about 450°C. Iron is used as a catalyst to speed … Read more

Ammonia is a compound of nitrogen and hydrogen with the formula NH3. It is a colourless gas with a characteristic pungent smell. Ammonia is an essential compound in industry. Although in extensive use, ammonia is both corrosive and hazardous. Uses of Ammonia The uses of ammonia include manufacturing nitrogenous fertilisers as a cooling agent in … Read more

Environmental and Health Issues of Sulphur Dioxide Sulphur dioxide, SO2 is one of the by-products of the Contact Process. It is one of the sources of environmental pollution. Acid Rain Sulphur dioxide (SO2) is the pollutant primarily associated with acid rain. Acid rain occurs when pH of the rain is between 2.4 and 5.0. This … Read more

Contact Process Sulphuric Acid is Manufactured in Industry Sulphuric acid, H2SO4 is manufactured in the industry through Contact Process. The raw materials used are sulphur, air and water The Contact process consists of four stages. Stage 1 Molten sulphur is burnt in dry air to produce sulphur dioxide The gas produced is then purified and … Read more

Sulphuric acid is a highly corrosive strong mineral acid with the molecular formula H2SO4. Sulphuric acid is a diprotic acid. Sulphuric acid has a wide range of applications. It is also a central substance in the chemical industry. Uses of Sulphuric Acid Applications of sulphuric acid include manufacturing fertiliser manufacturing detergent manufacturing pesticide manufacturing synthetic fibre as … Read more