صفحه 1:
صفحه 2:
Name Student ID Responsibility
Kwok Wan Wan 99086250 -cortent
-techrical support
Lui Ching Lam 99243090 -editor
-conte nt
Mok Hei Man 99200420 -editor
-visual design
Ng Wai Han 99242910 -irformationsearch
-techrical support
Soo May Kei 99200750 -irformationsearch
-conte nt
صفحه 3:
Target audience:
* £.5 chemistry students
° Averageability
Pvorposes:
* Introduce acidrain by lecturing
* Provide Q&A section for uation
صفحه 4:
2 7
° Generally, rainwater hasapHvalue
of 5.6 because of the carbon dioxide
fromair dissolvedinit
* Anyrainfall hasapHvaluelessthan
5.6is definedasacidrain
صفحه 5:
9
Hioxide, nitrogen dioxidedissolvein
rainwater,various acids are formed.
CO,+Wz0 > ین (cerboxir anid)
وله نینط فد میا +60
wid)
@MO,+WZ0 > ~~ WOOS (citer arid) +
WOO, (site
wid)
صفحه 6:
of) CAUSES OF ACID RAIN
O.: I% 0 : 0
۳ X= dere
صفحه 7:
©
—_#£60,,(u) م0 + (م900
)09( ۱
Formation f Mirvric Acta GINO,)
9000) + ۵۵0 9000)(
> )0۵۵ + () م9۳ + (مو۳00۵؟
€LOO, (sa)
صفحه 8:
صفحه 9:
ENVIRONMENTAL
PROBLEMS
4. Vegetation
* Washawayessential nutrientsionsfrom
soil
* Poor growthof plants
صفحه 10:
DAGuaticLife
° Inflow of acidicwater containing
poisonous metal ions
° Kill thefishandwater plants
1
صفحه 11:
2. Building
* Acidrainattacks the building
materialsandcauses corrosion.
صفحه 12:
2 تن جماعصوه
1. Whatisanacidrain?
Answer AT
2.What isthemain air pollutants for
theformation of acidrain?
Answer
صفحه 13:
3.WhatisthepH rangefor theacidrain?
200 NEUTRAL ALKALINE
i
4. What are themajor sources of air
pollutants?
i
صفحه 14:
5. What isthe side effect ofacidrainon
plants?
i
6. What isthe side effect ofacidrainon
marinelife?
Answer
صفحه 15:
صفحه 16:
2 On-Line References
° fittp://igc.apc.org/acidrain/
* Attp://beakman.com/acid/acid.fitml
* Attp://qlink.queensu.ca/~¥0rm4/
صفحه 17:
ap و
1. AcidRainis rainwater withpH
valuelessthan 6. Thisisthe rainfall
withacidity Cevel beyondwhat is
expectedinunpolluted rainfall
2.Themainairpollutantsare sulphur
Hioxideand nitrogen dioxide.
sO, NO,
صفحه 18:
Answer
3.Theunpolluted rainwater is slightly
acidic withpH about 5.6 because carbon
dioxidein theair dissolvesin rainwater to
formaweakacid. So,the pH of acidrain
water isbelow 5.6.
NEUTRAL ALKALINE = ممم
صفحه 19:
Auswer
4. Themajor sources weremotor vehicles,
factoriesandpower stations.
5.Acidrainmakes soils become acidic.
When the soil becomes acidic, theplant
will not grow well.
/
صفحه 20:
Answer
6. Whenacidrainrunsinto rivers or
Cakes, thepH value of water will goes
down below 5.Theaquaticlifein water
may die because of this.
صفحه 21:
Answer
7.Most buildingmaterials made of
Cimestoneandmarble. Theacidrain
watermainly sulphuricacidwill
react withcalciumcarbonatefrom
Cimestoneandmarbletoformcalcium
sulphate.
صفحه 22:
F.5
F.5Chemistry
Chemistry
Acid
AcidRain
Rain
Distribution
Distributionof
ofWork
Work
Name
Kwok Wan Wan
S tude nt I D
99086250
Lui Ching Lam
99243 090
Mok He i Man
99200420
Ng Wai Han
99242910
S oo May Ke i
99200750
Re s pons ibility
-conte nt
-technical s upport
-e ditor
-conte nt
-e ditor
-vis ual de s ign
-inf ormation s earch
-technical s upport
-inf ormation s earch
-conte nt
Target
Targetaudience:
audience:
• F.5 chemistry students
• Average ability
Purposes:
Purposes:
• Introduce acid rain by lecturing
• Provide Q&A section for evaluation
WHAT
WHATIS
ISACID
ACIDRAIN?
RAIN?
• Generally, rain water has a pH value
of 5.6 because of the carbon dioxide
from air dissolved in it
• Any rainfall has a pH value less than
5.6 is defined as acid rain
• When gas pollutants e.g. sulphur
dioxide, nitrogen dioxide dissolve in
rain water, various acids are formed.
CO2 + H2O
SO2 + H2O
acid)
NO2 + H2O
acid)
H2CO3 (carbonic acid)
H2SO3 (sulphorous
HNO2 (nitrous acid) +
HNO3 (nitric
CAUSES
CAUSESOF
OFACID
ACIDRAIN
RAIN
SO2 : 70%
NOx : 30%
X = 1 or 2
Formation
Formationof
ofSulphuric
SulphuricAcid
Acid(H
(H22SO
SO44))
2SO2(g) + O2(g)
2SO3(g)
SO3(g) + H2O(l) H2SO4(aq)
Formation
Formationof
ofNitric
NitricAcid
Acid(HNO
(HNO33))
2NO(g) + O2(g)
4NO2(g) + 2H2O(l) + O2(g)
4HNO3(aq)
2NO2(g)
SO2
NOX
FORMATION
FORMATIONOF
OF
ACID
ACIDRAIN
RAIN
ENVIRONMENTAL
ENVIRONMENTAL
PROBLEMS
PROBLEMS
1.Vegetation
1.Vegetation
• Wash away essential nutrients ions from
soil
• Poor growth of plants
2.Aquatic
2.AquaticLife
Life
• Inflow of acidic water containing
poisonous metal ions
• Kill the fish and water plants
3.
3.Building
Building
• Acid rain attacks the building
materials and causes corrosion.
1.
Question
Questionand
andAnswer
Answer
What is an acid rain?
2.What is the main air pollutants for
the formation of acid rain?
3.What is the pH range for the acid rain?
4.What are the major sources of air
pollutants?
5.What is the side effect of acid rain on
plants?
6. What is the side effect of acid rain on
marine life?
7. What is the side effect of acid rain on
building material?
On-line
On-lineReferences
References
• http://igc.apc.org/acidrain/
• http://beakman.com/acid/acid.html
• http://qlink.queensu.ca/~4lrm4/
Answer
1. Acid Rain is rain water with pH
value less than 6. This is the rainfall
with acidity level beyond what is
expected in unpolluted rainfall
2. The main air pollutants are sulphur
dioxide and nitrogen dioxide.
SO2
NO2
Answer
3. 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.
Answer
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
6. 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.
Answer
7. 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.
F.5
F.5Chemistry
Chemistry
Acid
AcidRain
Rain
