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: bendicott@educationalliance.ca ✓ Online Sch chool ol: Moodle.educationalliance.ca 2

Overview 1. 1. INTRODUCTIONS 2. T4EA Online Sc 2. Science 3. LAB 3. B – ACID RAIN SURVEY 4. POST 4. ST LAB AcidRain: : Is It In Your r 5. 5. A Few CONNECTI TIONS a) Keq Neighborh rhood? ? b) Conjugates c) Blood These se kits s are re available to T4E 4EA d) Ocean Acidification Schools’ participating in in Science 10 e) Acid Rain Online Education… f) Math_Logarithmic Ba Base se 10 Scale Brent Endicott bendicott@educationalliance.ca 3

T4EA Online School Want to improve: Student engagement? • Student Connectedness? • Student Graduation • Rates? • T4EA On-line school provides access to flexible distance education opportunities for our first nation schools… 4

School handbook 2019-2020 5

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HCO 3 - ✓ Precipitation that has absorbed and reacted with compounds in the atmosphere to form acids. CO 2 ✓ Ph < 5.6 (normal rain water) + ✓ pH 7.0 = distilled water + ⇌ ⇌ H 2 CO 3 H + (aq aq) H 2 0 Free Hydrogen cause acidification and lower pH 7

The Science The Science The chemicals responsible for acid rain… The chemicals responsible for acid rain … Natural & Man Made Sources!!! Natural & Man Made Sources!!! SO x Natural SO x Natural ✓ Sulfur is a ✓ Volcanoes ü Sulfur is a ü Volcanoes ü ✓ Fires contaminant of fossil Fires contaminant of fossil ✓ Wetlands ü fuels (coal/oil/natural fuels (coal/oil/natural Wetlands ✓ Anaerobic Bacteria ü gas). gas). Anaerobic Bacteria ü ✓ Combustion of these Combustion of these fuels → Sulfur fuels à Sulfur Man Made Man Made dioxide ( SO 2 ) à ü dioxide ( SO 2 ) → ✓ Fossil Fuels Fossil Fuels ✓ Smelting ü react w/atmospheric react w/atmospheric Smelting compounds → H 2 SO 4 . compounds à H 2 SO 4 . ✓ Industrial ü Industrial

The Science The chemicals responsible for acid rain… Natural & Man Made Sources!!! NO x Natural ✓ Formed by combination ✓ High Temperature of Nitrogen and Oxygen. Combustion Fires ✓ Atmosphere: ~78% ✓ Lightning Nitrogen & 21% Oxygen ✓ HIGH Temperature Man Made Combustion ✓ Automobile Engines ✓ Vehicle Engines Ideal • NO 2 reacts with hydrocarbons in presence of environments for sunlight to produce smog. reactants → ( NO ) → • NO 2 reacts with hydroxyl radicals to produce nitric ( NO 2 ) → NITRIC ACID acid – acid precipitation.

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1. What was the pH of your 2. How would you ‘classify’ samples? Which is Acidid? our substances into 3 Basic? How do you know? groups? Explain! Acid Rain Survey Lab 3. How is Acid Rain Understanding pH formed? 1. 4. How does Acid Presenter demo… 2. Obtain Solution Samples in test tubes and 6 ph Rain affect water, strips… soil, 3. Obtain ph strip. 4. plants? What pH Dip ph strip into sample (immerse at least 5 constitutes ‘acid seconds 5. rain’? Remove the paper and record color and ph using your chart. 6. Repeat! 5 . What can be done to help reduce the formation of Acid Rain? 11

Earthquakes Richter Scale Acid Rain Survey Logarithmic Base 10 Scale Lab representing pH pH scale is logarithmic (base 10) How Can you visually represent the ph scale to your students? 12

Connections! 13

Chemistry 30 H 2 0 + CO 2 → H 2 CO 3 → H + (aq) + HCO 3 - (aq) Carbonic Hydrogen Hydrogen acid ion Carbonate Bicarbonate Carbonate Carbonic Acid (Bicarbonate) plays surprisingly important roles in diverse biological processes 14

Chemistry 30 H 2 0 + CO 2 → H 2 CO 3 → H + (aq) + HCO 3 - (aq) K < 1: [R] > [P] K = [H 2 CO 3 ]/[CO 2 ] K = 1: [R] = [P] = 1.2 x 10 -3 M K > 1: [P] > [R] 15

Chemistry 30 H 2 0 + CO 2 → H 2 CO 3 → H + (aq) + HCO 3 - (aq) Weak Conjugate Acid Base Conjugates are formed when an acid loses a hydrogen proton or a base gains a hydrogen proton 16

biology 30 H 2 0 + CO 2 → H 2 CO 3 → H + (aq) + HCO 3 - (aq) In red blood cells carbonic anhydrase (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. 17

biology 30 H 2 0 + CO 2 → H 2 CO 3 → H + (aq) + HCO 3 - (aq) In tissue, Cellular Respiration produces CO 2 as a waste product ; most of this CO 2 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 CO 2 and released during exhalation. CO 2 (Tissues) → HCO 3 (Blood) → CO 2 (Lungs) 18

biology 30/Environmental Science 20 H 2 0 + CO 2 → H 2 CO 3 → H + (aq) + HCO 3 - (aq) Ongoing decrease in the pH of the Earth’s oceans. B/W 1791 – Present Oceans absorb ~ ½ of the CO 2 emitted by humans Day: caused by the burning of fossil fuels . >30% Increase To achieve equilibrium , some of the CO 2 reacts with [H+] water to form carbonic acid (H 2 CO 3 ). 19 Undermines marine ecosystems!!!

Brent Endicott bendicott@educationalliance.ca 306-331-5284 20