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Questions and Answers
Which action will NOT likely increase the rate of a chemical reaction between a solid and a liquid?
Which action will NOT likely increase the rate of a chemical reaction between a solid and a liquid?
- Adding a catalyst to the reaction.
- Increasing the surface area of the solid reactant.
- Increasing the concentration of the liquid reactant.
- Decreasing the temperature of the reaction. (correct)
What information is NOT conveyed by a balanced chemical equation?
What information is NOT conveyed by a balanced chemical equation?
- The chemical formulas of the reactants and products.
- The physical states of the reactants and products.
- The stoichiometric coefficients indicating the molar ratios of reactants and products.
- The rate of the reaction. (correct)
According to collision theory, which factor does NOT increase the likelihood of a successful reaction between two molecules?
According to collision theory, which factor does NOT increase the likelihood of a successful reaction between two molecules?
- Increasing the concentration of reactants.
- The molecules colliding with the correct orientation.
- The molecules colliding with sufficient kinetic energy.
- Decreasing the frequency of collisions. (correct)
Consider the reaction: $2H_2(g) + O_2(g) \rightarrow 2H_2O(g)$. If the rate of disappearance of $H_2$ is 0.4 M/s, what is the rate of appearance of $H_2O$?
Consider the reaction: $2H_2(g) + O_2(g) \rightarrow 2H_2O(g)$. If the rate of disappearance of $H_2$ is 0.4 M/s, what is the rate of appearance of $H_2O$?
In a chemical reaction, what is the role of a catalyst?
In a chemical reaction, what is the role of a catalyst?
Which type of chemical reaction is represented by the general equation: $AB + CD \rightarrow AD + CB$?
Which type of chemical reaction is represented by the general equation: $AB + CD \rightarrow AD + CB$?
Which of the following is not a direct method for measuring the rate of a reaction?
Which of the following is not a direct method for measuring the rate of a reaction?
What is the correct balanced equation for the reaction between methane ($CH_4$) and oxygen ($O_2$) to produce carbon dioxide ($CO_2$) and water ($H_2O$)?
What is the correct balanced equation for the reaction between methane ($CH_4$) and oxygen ($O_2$) to produce carbon dioxide ($CO_2$) and water ($H_2O$)?
Consider the word equation: 'Sodium reacts with chlorine to form sodium chloride'. What is the corresponding symbol equation?
Consider the word equation: 'Sodium reacts with chlorine to form sodium chloride'. What is the corresponding symbol equation?
Which of the following changes will simultaneously increase the rate of a reaction and provide lower activation energy?
Which of the following changes will simultaneously increase the rate of a reaction and provide lower activation energy?
Flashcards
Reactants
Reactants
Substances that start a chemical reaction.
Products
Products
Substances that are produced as a result of a chemical reaction.
Word Equation
Word Equation
A chemical equation using words to represent reactants and products.
Symbol Equation
Symbol Equation
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Balancing Equations
Balancing Equations
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Types of Chemical Reactions
Types of Chemical Reactions
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Rate of Reaction
Rate of Reaction
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Collision Theory
Collision Theory
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Factors Affecting Reaction Rate
Factors Affecting Reaction Rate
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Measuring Reaction Rates
Measuring Reaction Rates
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Study Notes
- Chemical reactions involve reactants combining to form products.
Word Equations
- Represent chemical reactions using the names of the reactants and products.
Symbol Equations
- Use chemical symbols and formulas to represent reactants and products.
- They provide more specific information than word equations.
Balancing Equations
- Balancing equations ensures that the number of atoms for each element is the same on both sides of the equation, adhering to the law of conservation of mass.
- Use coefficients to adjust the number of molecules.
Types of Chemical Reactions
- Synthesis reactions involve the combination of two or more reactants to form a single product.
- Decomposition reactions involve a single reactant breaking down into two or more products.
- Single displacement reactions involve one element replacing another in a compound.
- Double displacement reactions involve the exchange of ions between two compounds.
- Combustion reactions involve the rapid reaction between a substance with an oxidant, usually oxygen, to produce heat and light.
Rates of Reactions
- The rate of reaction is the speed at which a chemical reaction occurs.
Collision Theory
- States that for a reaction to occur, reactant particles must collide with sufficient energy (activation energy) and proper orientation.
Factors Affecting Rate of Reaction
- Temperature: Increasing temperature generally increases the rate of reaction.
- Concentration: Higher reactant concentration usually increases the rate of reaction.
- Surface Area: Increasing the surface area of a solid reactant increases the rate of reaction.
- Catalysts: Catalysts speed up reactions by lowering the activation energy.
Measuring Rates of Reaction
- Rates can be measured by monitoring the change in concentration of reactants or products over time.
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