Chemistry saved the day IGCSE Y9 3 case studies that apply chemistry in life Air pollution • Air pollution is the presence of a substance which consists of toxic or poisonous contaminants in the atmosphere due to the harmful and excessive quantities of substances including gases, particles and biological molecules. Effects of air pollution and its pollutants • Nitrogen Oxides (NOx), Carbon monoxide and Sulfur Dioxide (SO2) are produced by Burning of gasoline, natural gas and oil. Moreover, the CFCs are compounds that have been released into the atmosphere in various applications such as air-conditioning, insulations, propellants in aerosol cans and solvents. • asthma, respiratory illness, cardiovascular disease and lung cancer. • may be damaged crops, forests, vegetation and cultivate Acid rain. Water desalination • Water desalination is the process of separating dissolved salts and other impurities into fresh water that can be reused for consumption or other purposes. • Reverse osmosis and distillation. Distillation • Distillation is the process of separating the components or substances from a liquid mixture by applying selective boiling and condensation along with boiling it into vapour and condensed back into liquid in a separate container. Reverse osmosis • Reverse osmosis is a water purification technology that uses a partially permeable membrane to remove ions, molecules and larger particles from water. • It is the concentration gradient from lower concentration to higher concentration. The application of povidone iodine on wounds • Iodine is a chemical element with The heaviest of the stable halogens, has high melting point and exists as a lustrous, purple-black non-metallic solid. • Povidone-iodine be used in first aid for minor cuts, grazes, burns, abrasions and blisters. • it diffuses and affects the structure, functions of enzymes, cell proteins and damages bacterial cell function by blocking hydrogen bonding and altering the membrane structure. THANK YOU!
