Podcast
Questions and Answers
What do chemical equations use to represent a chemical reaction?
What do chemical equations use to represent a chemical reaction?
- Shapes and colors
- Words describing the reaction
- Numerical values only
- Symbols for elements or compounds (correct)
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?
- The substance is an aqueous solution
- The substance is mixed with a liquid
- The substance is a solid compound
- The substance is in a gaseous state (correct)
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?
- The number of moles of the substance (correct)
- The color of the reactants
- The temperature required for the reaction
- The weight of each substance in grams
What does the symbol '(l)' represent in a chemical equation?
What does the symbol '(l)' represent in a chemical equation?
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?
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?
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?
How do you indicate a chemical reaction in a chemical equation?
How do you indicate a chemical reaction in a chemical equation?
Flashcards
What is a chemical equation?
What is a chemical equation?
A chemical equation is a symbolic representation of a chemical reaction using chemical formulas and symbols.
What are reactants in a chemical equation?
What are reactants in a chemical equation?
In a chemical equation, reactants are the substances that are present before the reaction occurs and are written on the left side of the equation.
What are products in a chemical equation?
What are products in a chemical equation?
In a chemical equation, products are the new substances formed as a result of the chemical reaction and are written on the right side of the equation.
What does the arrow in a chemical equation represent?
What does the arrow in a chemical equation represent?
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What are coefficients in a chemical equation?
What are coefficients in a chemical equation?
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What do the parentheses in a chemical equation represent?
What do the parentheses in a chemical equation represent?
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What is balancing a chemical equation?
What is balancing a chemical equation?
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How to write a chemical equation?
How to write 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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