Podcast
Questions and Answers
What do chemical equations use to represent a chemical reaction?
What do chemical equations use to represent a chemical reaction?
In the equation 2H2(g) + O2(g) → 2H2O(g), what does the 'g' indicate?
In the equation 2H2(g) + O2(g) → 2H2O(g), what does the 'g' indicate?
What do the numbers such as '2' and '3' represent in the chemical equation 2H2 + O2 → 2H2O?
What do the numbers such as '2' and '3' represent in the chemical equation 2H2 + O2 → 2H2O?
What does the symbol '(l)' represent in a chemical equation?
What does the symbol '(l)' represent in a chemical equation?
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When writing a chemical equation, what do you do with the elements and compounds involved?
When writing a chemical equation, what do you do with the elements and compounds involved?
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In the chemical equation Al(s) + Br2(l) → AlBr3(s), what does the '(s)' indicate?
In the chemical equation Al(s) + Br2(l) → AlBr3(s), what does the '(s)' indicate?
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What is the correct term to describe the arrangement of reactants and products in a chemical equation?
What is the correct term to describe the arrangement of reactants and products in a chemical equation?
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How do you indicate a chemical reaction in a chemical equation?
How do you indicate a chemical reaction in a chemical equation?
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Study Notes
Learning Targets and Agenda
- Learning target for 12/13/2024: Students will be able to write a chemical equation.
- Agenda items include notes on chemical equations and practice writing chemical equations.
- No assignments are due this week.
Chemical Equations as Symbols
- Chemical equations use symbols to represent chemical reactions.
- Symbols (emojis) are frequently used to convey messages.
- Example: rain cloud + 2 cats + 2 dogs = a complete sentence
Chemical Equations - Key Concepts
- Chemical equations use symbols to represent chemical reactions.
- Reactants are on the left side.
- Products are on the right side.
- Example: 2H₂(g) + O₂(g) → 2H₂O(g)
Phases of Matter
- Phases of matter are represented by symbols in parentheses after each substance:
- Solid (s)
- Liquid (l)
- Gas (g)
- Dissolved in a solvent (aq)
- The image displays a visual representation of solids, liquids, and gases, illustrating how energy affects the transition between the three states.
Building Chemical Equations
- Steps to build chemical equations:
- First, identify the elements and compounds involved.
- Use the appropriate symbols to represent the elements and compounds.
- Add the plus sign (+) to separate reactants and the arrow (→) to separate reactants and products.
- Use parentheses and appropriate symbols (s, l, g, aq) to represent the state of each substance.
- Example: Al(s) + Br₂(l) → AlBr₃(s)
Practice and Due Dates
- Students are directed to practice writing chemical equations.
- Practice assignments are due on December 16 & 17, 2024.
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