Acid Rain

Acid Rain

اسلاید 1: F.5 Chemistry Acid Rain

اسلاید 2: Distribution of Work

اسلاید 3: Target audience:F.5 chemistry studentsAverage abilityPurposes:Introduce acid rain by lecturing Provide Q&A section for evaluation

اسلاید 4: WHAT IS ACID RAIN?Generally, rain water has a pH value of 5.6 because of the carbon dioxide from air dissolved in itAny rainfall has a pH value less than 5.6 is defined as acid rain

اسلاید 5: When gas pollutants e.g. sulphur dioxide, nitrogen dioxide dissolve in rain water, various acids are formed.CO2 + H2OH2CO3 (carbonic acid)SO2 + H2OH2SO3 (sulphorous acid)NO2 + H2OHNO2 (nitrous acid) +HNO3 (nitric acid)

اسلاید 6: CAUSES OF ACID RAIN

اسلاید 7: Formation of Sulphuric Acid (H2SO4)2SO2(g) + O2(g) 2SO3(g)SO3(g) + H2O(l)H2SO4(aq)Formation of Nitric Acid (HNO3)2NO(g) + O2(g) 2NO2(g)4NO2(g) + 2H2O(l) + O2(g) 4HNO3(aq)

اسلاید 8: FORMATION OF ACID RAINSO2 NOX

اسلاید 9: 1.VegetationWash away essential nutrients ions from soilPoor growth of plantsENVIRONMENTAL PROBLEMS

اسلاید 10: 2.Aquatic LifeInflow of acidic water containing poisonous metal ionsKill the fish and water plants

اسلاید 11: 3. BuildingAcid rain attacks the building materials and causes corrosion.

اسلاید 12: 1.What is an acid rain?2.What is the main air pollutants for the formation of acid rain?Question and AnswerAnswerAnswer

اسلاید 13: 3.What is the pH range for the acid rain?4.What are the major sources of air pollutants?AnswerAnswer

اسلاید 14: 5.What is the side effect of acid rain on plants? 6. What is the side effect of acid rain on marine life?AnswerAnswer

اسلاید 15: 7. What is the side effect of acid rain on building material?Answer

اسلاید 16: On-line Referenceshttp://igc.apc.org/acidrain/http://beakman.com/acid/acid.htmlhttp://qlink.queensu.ca/~4lrm4/

اسلاید 17: Answer1. Acid Rain is rain water with pH value less than 6. This is the rainfall with acidity level beyond what is expected in unpolluted rainfall2. The main air pollutants are sulphur dioxide and nitrogen dioxide. SO2 NO2

اسلاید 18: Answer3. The unpolluted rain water is slightly acidic with pH about 5.6 because carbon dioxide in the air dissolves in rain water to form a weak acid. So, the pH of acid rain water is below 5.6.

اسلاید 19: 4. The major sources were motor vehicles, factories and power stations.5. Acid rain makes soils become acidic. When the soil becomes acidic, the plant will not grow well.Answer

اسلاید 20: Answer6. When acid rain runs into rivers or lakes, the pH value of water will goes down below 5. The aquatic life in water may die because of this.

اسلاید 21: Answer7. Most building materials made of limestone and marble. The acid rain water mainly sulphuric acid will react with calcium carbonate from limestone and marble to form calcium sulphate.

اسلاید 22: F.5 Chemistry Acid Rai