Podcast
Questions and Answers
What is the pH of normal rain or snow?
What is the pH of normal rain or snow?
- 4.5
- 6.0
- 7.0
- 5.6 (correct)
What occurs when acidic deposits accumulate over the winter and melt in the spring?
What occurs when acidic deposits accumulate over the winter and melt in the spring?
- Spring Neutralization
- Seasonal pH Stability
- Spring Acid Shock (correct)
- Winter Acidity Release
Which of the following acids is associated with acid rain?
Which of the following acids is associated with acid rain?
- H2CO3 (Carbonic acid)
- H2SO4 (Sulfuric acid) (correct)
- H2O2 (Hydrogen peroxide)
- HCl (Hydrochloric acid)
What is the purpose of using scrubbers in controlling acid effects?
What is the purpose of using scrubbers in controlling acid effects?
How do catalytic converters help reduce harmful emissions?
How do catalytic converters help reduce harmful emissions?
What is the pH range that indicates a substance is basic?
What is the pH range that indicates a substance is basic?
Which of the following is NOT a property of acids?
Which of the following is NOT a property of acids?
What does a pH of 7.0 represent?
What does a pH of 7.0 represent?
Which indicator changes color in the presence of both acids and bases?
Which indicator changes color in the presence of both acids and bases?
What is the expected outcome when an acid reacts with a base?
What is the expected outcome when an acid reacts with a base?
What is the effect of acid rain on living organisms?
What is the effect of acid rain on living organisms?
Which of the following is a common misconception about identifying acids and bases?
Which of the following is a common misconception about identifying acids and bases?
How does the pH scale represent differences in acidity or alkalinity?
How does the pH scale represent differences in acidity or alkalinity?
Flashcards
Acid Rain
Acid Rain
Rain or snow with a pH lower than 5.6, caused by dissolved acidic compounds like sulfur dioxide and nitrogen oxides.
Spring Acid Shock
Spring Acid Shock
A sudden decrease in the pH of water bodies, especially lakes, during spring due to the melting of snow and ice that have accumulated acidic deposits over the winter.
Scrubbers
Scrubbers
A chemical process that uses limestone mixed with water to remove sulfur particles from toxic gases.
Catalytic Converter
Catalytic Converter
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Complete Combustion
Complete Combustion
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Acid
Acid
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pH
pH
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pH Indicators
pH Indicators
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Neutralization
Neutralization
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Base
Base
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Litmus Paper
Litmus Paper
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pH Scale
pH Scale
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Study Notes
Acids and Bases
- Acids are chemicals that produce acidic substances, with a pH less than 7
- Bases are chemicals that produce basic substances, with a pH more than 7
- Taste: Acids are sour, bases are bitter
- Feel: Acids sting, bases feel slippery
- Identifying unknown chemicals through tasting or feeling is not an acceptable method
- Indicators: Substances that change colour when reacting with acids and bases.
- Bromothymol Blue
- Universal Indicator
- Litmus: A chemical indicator made from plant compounds.
- Turns red in acidic solutions
- Turns blue in basic solutions
- A light pink colour indicates a neutral solution
- Doesn't give precise pH values
- Neutralization: A reaction between acids and bases that produces a salt and water
- pH Scale: A scale ranging from 0 to 14 that measures acidity and basicity.
- pH of 7 is neutral
- pH less than 7 is acidic
- pH more than 7 is basic
- Each pH unit represents a 10-fold increase in acidity or basicity
- Acid Rain: Rainwater with a pH lower than 5.6.
- Result from sulfur dioxide and nitrogen dioxide in the air
- Significant impact on ecosystems
- Neutralizing Acids: Methods to reduce the acidity of lakes or water
- Adding lime (calcium hydroxide) neutralizes acidic lakes
- Using scrubbers in industrial settings to trap acidic gases (e.g. SO2)
- Catalytic converters help control acid production in vehicles
- Important for ecosystem health and human safety
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