Welcome to t4ea online science 10 Acid Rain Survey Kit - - PowerPoint PPT Presentation
Welcome to t4ea online science 10 Acid Rain Survey Kit presentation Hello! Brent Endicot cott Position: Principal (Administrator(/Instructional Design) T4EA Online Education Mobi obile: 306-331-5284 Email:
Welcome to t4ea online science 10 Acid Rain Survey Kit presentation
Brent Endicot cott ✓ Position: Principal (Administrator(/Instructional Design) T4EA Online Education ✓ Mobi
✓ Email: bendicott@educationalliance.ca ✓ Online Sch chool
2
These se kits s are re available to T4E 4EA Schools’ participating in in Science 10 Online Education…
3
1. 1. INTRODUCTIONS 2.
Science 3.
B – ACID RAIN SURVEY 4.
ST LAB 5.
TIONS a) Keq b) Conjugates c) Blood d) Ocean Acidification e) Acid Rain f) Math_Logarithmic Ba Base se 10 Scale Brent Endicott bendicott@educationalliance.ca
AcidRain: : Is It In Your r Neighborh rhood? ?
Want to improve:
4
T4EA Online School
T4EA On-line school provides access to flexible distance education opportunities for our first nation schools…
School handbook
2019-2020
5
6
H20 CO2 H2CO3
7
⇌ + ⇌
H +
(aq aq)+
HCO3
the atmosphere to form acids. ✓ Ph < 5.6 (normal rain water) ✓ pH 7.0 = distilled water Free Hydrogen cause acidification and lower pH
The chemicals responsible for acid rain…
SOx ✓ Sulfur is a contaminant of fossil fuels (coal/oil/natural gas). ✓ Combustion of these fuels → Sulfur dioxide (SO2) → react w/atmospheric compounds → H2SO4. Natural & Man Made Sources!!! Natural ✓ Volcanoes ✓ Fires ✓ Wetlands ✓ Anaerobic Bacteria Man Made ✓ Fossil Fuels ✓ Smelting ✓ Industrial
The chemicals responsible for acid rain…
SOx ü Sulfur is a contaminant of fossil fuels (coal/oil/natural gas). ü Combustion of these fuels à Sulfur dioxide (SO2) à react w/atmospheric compounds à H2SO4. Natural & Man Made Sources!!! Natural ü Volcanoes ü Fires ü Wetlands ü Anaerobic Bacteria Man Made ü Fossil Fuels ü Smelting ü Industrial
The chemicals responsible for acid rain…
Natural & Man Made Sources!!! NOx ✓ Formed by combination
✓ Atmosphere: ~78% Nitrogen & 21% Oxygen ✓ HIGH Temperature Combustion ✓ Vehicle Engines Ideal environments for reactants → (NO) → (NO2) → NITRIC ACID Natural ✓ High Temperature Combustion Fires ✓ Lightning Man Made ✓ Automobile Engines
sunlight to produce smog.
acid – acid precipitation.
10
Acid Rain Survey Lab Understanding pH 1.
Presenter demo…
2.
Obtain Solution Samples in test tubes and 6 ph strips…
3.
Obtain ph strip.
4.
Dip ph strip into sample (immerse at least 5 seconds
5.
Remove the paper and record color and ph using your chart.
6.
Repeat! 11
groups? Explain!
formed?
Rain affect water, soil, plants? What pH constitutes ‘acid rain’? 5 . What can be done to help reduce the formation of Acid Rain?
samples? Which is Acidid? Basic? How do you know?
Acid Rain Survey Lab
representing pH pH scale is logarithmic (base 10)
How Can you visually represent the ph scale to your students?
12
Earthquakes Richter Scale
Logarithmic Base 10 Scale
13
H20 + CO2 →H2CO3 → H+(aq) + HCO3
14
Carbonic acid Hydrogen ion Hydrogen Carbonate Bicarbonate Carbonate
Carbonic Acid (Bicarbonate) plays surprisingly important roles in diverse biological processes
H20 + CO2 →H2CO3 → H+(aq) + HCO3
15
K < 1: [R] > [P] K = 1: [R] = [P] K > 1: [P] > [R] K = [H2CO3]/[CO2] = 1.2 x 10-3 M
H20 + CO2 →H2CO3 → H+(aq) + HCO3
16
Conjugates are formed when an acid loses a hydrogen proton or a base gains a hydrogen proton
Conjugate Base Weak Acid
H20 + CO2 →H2CO3 → H+(aq) + HCO3
17
In red blood cells carbonicanhydrase (Enzyme) catalyzes the reaction to convert carbon dioxide (a by- product of cellular respiration) into carbonic acid, which further breaks down into bicarbonate ions and protons (H+). The production of bicarbonate ions and protons regulates the pH of the blood, creating an environment in which your cells can live.
H20 + CO2 →H2CO3 → H+(aq) + HCO3
18
In tissue, Cellular Respiration produces CO2 as a waste product; most of this CO2 is rapidly removed from the tissues by its hydration to bicarbonate ion. The bicarbonate ion present in the blood plasma is transported to the lungs, where it is dehydrated back into CO2 and released during exhalation. CO2 (Tissues) → HCO3 (Blood) → CO2 (Lungs)
biology 30/Environmental Science 20
H20 + CO2 →H2CO3 → H+(aq) + HCO3
19
Ongoing decrease in the pH of the Earth’s oceans. Oceans absorb ~ ½ of the CO2 emitted by humans caused by the burning of fossil fuels. To achieve equilibrium, some of the CO2 reacts with water to form carbonic acid (H2CO3). Undermines marine ecosystems!!! B/W 1791 – Present Day: >30% Increase [H+]
Brent Endicott bendicott@educationalliance.ca 306-331-5284
20