acid Ant sting Nettle sting Oxalic acid Tomato Tartaric acid Tamarind Mineral Acids:- Acids that prepare from mineral are known as mineral acids‚ inorganic acids‚ man-made acids or synthetic acid‚ such as hydrochloric acid‚ sulphuric acid‚ nitric acid‚ etc. Chemical Properties of Acid Reaction of acids with metal: Acids give hydrogen gas along with respective salt when they react with a metal. Example:- Hydrogen gas and zinc chloride are formed when hydrochloric acid reacts with
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Title: Investigating the Properties of Period 3 Oxides Aim: To examine the oxides of Period 3 elements and describe their structure and bonding. Introduction: Generally‚ there are oxides of metals and non-metals. Metals burn in oxygen to form basic oxides while non-metals form acidic oxides. Structurally‚ they are covalent or ionic compounds. You are to do some simple observations and tests‚ to find out the differences between the types of oxides provided and to account for these differences
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types of air pollutants are carbon monoxide‚ hydrocarbons‚ nitrogen oxides‚ particulates‚ sulfur dioxide‚ and photochemical oxidants. One of the air polution is acid rain. Acid rain is some of the sulfur dioxide gases released as waste products from factories‚ cars‚ and power plants mix with water vapor in the atmosphere to produce acid rain . Rain is slightly acidic‚ but when mixed with such chemicals as sulfuric acid and nitric acid‚ it can reach dangerous levels. Acid rain can damage soil‚ crops
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Gas Tungsten Arc Welding The Process Gas Tungsten Arc Welding‚ also known as Tungsten Inert Gas Welding‚ is an arc welding process that uses a non-consumable tungsten electrode to produce a weld. The weld area is protected from atmospheric contamination by an inert shielding gas‚ such as argon or helium‚ and filler metal is normally used‚ except in autogenous welds. A constant-current welding power supply produces energy which is conducted across the arc through a column of highly ionized gas and
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recovered as fuel for boilers and kilns. There are many different chemical substances emit by industrial activities that contribute to air pollution. These chemicals come from a variety of sources. Among the many types of air pollutants are nitrogen oxides‚ carbon monoxides‚ and organic compounds that can evaporate and enter the atmosphere. Air pollutants have sources that are both natural and human. Now‚ humans contribute substantially more to the air pollution problem. The effects of air pollution
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OZONE LAYER The Earth ’s ozone layer protects all life from the sun ’s harmful radiation‚ but human activities have damaged this shield. Less protection from ultraviolet light will‚ over time‚ lead to higher skin cancer and cataract rates and crop damage. The ozone layer is one layer of the stratosphere‚ the second layer of the Earth’s atmosphere. The stratosphere is the mass of protective gases clinging to our planet. Ozone is only a trace gas in the atmosphere only about 3 molecules for every
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from the University of Adelaide in Australia‚ dark chocolate (sorry‚ milk chocolate lovers) may reduce blood pressure. That’s because cocoa contains antioxidant compounds called flavanols‚ which are responsible for the formation of nitric oxide in the body. Nitric oxide causes blood vessel walls to relax and open wider. The result? Lower blood pressure. What’s more‚ daily consumption of dark chocolate has also been linked to lower incidents of heart attacks and stroke in people at high risk due to
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TITLE : The copper cycle IN TRODUCTION The purpose of the experiment is to recognize that change of state‚ change in colour‚ formation of a precipitate‚ or the evolution of heat are associated with a chemical change; to study reactions of copper. Copper is an element that can be found in nature in a variety of different compounds. The most common natural ore is the sulphide‚ known as chalcocite‚ Cu2S. This mineral is an important source of copper metal because it is about 80% copper by
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of precipitation that is unusually acidic‚ meaning that it possesses elevated levels of hydrogen ions (low pH). It can have harmful effects on plants‚ aquatic animals and infrastructure. Acid rain is caused by emissions of sulfur dioxide and nitrogen oxide‚ which react with the water molecules in the atmosphere to produce acids. The most obvious environmental effect of acid rain has been the loss of fish in acid sensitive lakes and streams. Many species of fish are not able to survive in acidic water
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active metals and they will react with very hot water or steam to form the oxide and hydrogen gas. * The oxides of all of these first metals resist reduction by H2. * The next six metals (iron - lead) replace hydrogen from HCl and dil. sulfuric and nitric acids. Their oxides undergo reduction by heating with H2‚ carbon‚ and carbon monoxide. * The metals lithium - copper‚ can combine directly with oxygen to form the oxide. * The last five metals (mercury - gold) are often found free in
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