Podcast
Questions and Answers
In a chemical reaction, what is the relationship between the amount of reactants and the amount of products produced?
In a chemical reaction, what is the relationship between the amount of reactants and the amount of products produced?
- Increasing the amount of reactants increases the amount of products. (correct)
- Increasing the amount of reactants decreases the amount of products.
- The amount of products will stay constant no matter the amount of reactants.
- The amount of reactants has no effect on the amount of products.
If a chemical reaction results in a new element being present, is it a chemical change?
If a chemical reaction results in a new element being present, is it a chemical change?
- No, a new element being present indicates a physical change.
- Not always, it depends on amount of the element that is present.
- It depends on the specific properties of the new element.
- Yes, the presence of a new element always indicates a chemical change. (correct)
Which of the following is the correct way to balance a chemical equation?
Which of the following is the correct way to balance a chemical equation?
- Adjusting the subscripts of the chemical formulas to equalize atoms on both sides.
- Adding coefficients in front of the chemical formulas to equalize the number of atoms of each element on both sides. (correct)
- Removing chemicals from the equation to make sure the equation is balanced.
- Changing the chemical formulas on one side of the equation to match the other side.
How does a catalyst affect the activation energy of a chemical reaction?
How does a catalyst affect the activation energy of a chemical reaction?
What impact does increasing the amount of a catalyst have on the rate and consistency of a chemical reaction?
What impact does increasing the amount of a catalyst have on the rate and consistency of a chemical reaction?
How does increasing the surface area of reactants affect the rate of a chemical reaction, and why?
How does increasing the surface area of reactants affect the rate of a chemical reaction, and why?
What is the relationship between particle size and surface area?
What is the relationship between particle size and surface area?
How does an increase in temperature typically affect the rate of a chemical reaction?
How does an increase in temperature typically affect the rate of a chemical reaction?
According to collision theory, what primarily dictates the rate of a chemical reaction?
According to collision theory, what primarily dictates the rate of a chemical reaction?
How does thermal energy relate to activation energy in a chemical reaction?
How does thermal energy relate to activation energy in a chemical reaction?
How does agitation influence the rate of a chemical reaction, and why?
How does agitation influence the rate of a chemical reaction, and why?
Which factor does NOT increase reaction rate?
Which factor does NOT increase reaction rate?
Which of the options is not a vocab word in the text?
Which of the options is not a vocab word in the text?
What is activation energy?
What is activation energy?
How is reaction rate measured?
How is reaction rate measured?
What is reaction rate?
What is reaction rate?
If there is a greater surface area present, what is the effect on product production?
If there is a greater surface area present, what is the effect on product production?
Which of the following is not a vocab word from section 4 of the content?
Which of the following is not a vocab word from section 4 of the content?
According to collision theory, which of the circumstances will result in the fastest reaction?
According to collision theory, which of the circumstances will result in the fastest reaction?
How do we write chemical equations?
How do we write chemical equations?
Flashcards
Reaction rate
Reaction rate
How quickly a reaction occurs; measurable in units of time.
Chemical Reaction
Chemical Reaction
A process involving the rearrangement of atoms and molecules to form new substances.
Reactants
Reactants
Substances that start a chemical reaction.
Products
Products
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Chemical equations
Chemical equations
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Balancing chemical equations
Balancing chemical equations
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Activation Energy
Activation Energy
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Catalysts
Catalysts
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Surface Area
Surface Area
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Particle Size
Particle Size
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Temperature
Temperature
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Thermal Energy
Thermal Energy
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Collision Theory
Collision Theory
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Agitation
Agitation
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Study Notes
- Reaction rate is how quickly a reaction happens, measurable in time.
Amount of Reactants and Reaction Rate
- A chemical reaction involves two or more chemicals reacting to create something new, causing chemical changes.
- A chemical change occurs when a new element is present after the reaction.
- Reactants are the substances that react, while products are the result of the reaction.
- Increasing the amount of reactants leads to a faster reaction and more products, because more substances are reacting.
- Vocabulary: chemical reaction, reactant, product
Catalysts and Reaction Rate
- A chemical equation represents the combination of two or more chemicals into a new chemical, written with chemical formulas separated by + signs.
- Balancing chemical equations involves ensuring the same amount of each chemical is present on both sides by adding coefficients in front of the chemical formulas.
- Activation energy is the minimum energy required for a reaction to occur.
- Catalysts reduce the activation energy needed, making the reaction faster and requiring less effort.
- Increasing the amount of a catalyst results in a more consistent and faster reaction.
- Vocabulary: rate of reaction, chemical equation, catalyst
Surface Area and Reaction Rate
- Increasing the surface area of reactants exposes more particles, accelerating the reaction.
- Smaller particle sizes correspond to greater surface area.
- Vocabulary: rate of reaction, surface area, particle size
Temperature and Reaction Rate
- Increasing the temperature of a reaction speeds up the reaction.
- Collision theory suggests that the more particles collide, the faster the reaction proceeds.
- Activation energy is the minimum energy needed for a reaction to occur.
- Higher temperatures allow reactions to happen at higher energy levels, increasing speed.
- Vocabulary: rate of reaction, thermal energy, temperature, collision theory, activation energy
Agitation and Reaction Rate
- Collision theory states that more particle collisions lead to a faster reaction.
- Increased agitation leads to more frequent and faster particle collisions, accelerating the reaction.
- Vocabulary: rate of reaction, agitation, collision theory
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