⦁ How does changing the _________ of the reacting particles change the rate of the reaction? If there are more particles, there will be more _________, so more chance of effective collisions. (p. 2-3)

Question

⦁ Another factor that affects the reaction rate is the reactant particle size, which is related to _________ _ _______. (p.6)
⦁ If a sugar cube was crushed into a powder, the _________ of the sugar would remain the same, but the _________ _________ of the powder would increase tremendously.
⦁ Consider the figure below showing a cube being divided up into smaller pieces. Notice how volume is the same, but the surface area where reactions can occur would increase.

Answer 1

It looks like you're discussing factors that affect the rate of chemical reactions. Here are the suggested completions for the statements:

1. How does changing the concentration of the reacting particles change the rate of the reaction? If there are more particles, there will be more collisions, so more chance of effective collisions. (p. 2-3)

2. Another factor that affects the reaction rate is the reactant particle size, which is related to surface area. (p.6)

3. If a sugar cube was crushed into a powder, the mass of the sugar would remain the same, but the surface area of the powder would increase tremendously.

4. Consider the figure below showing a cube being divided up into smaller pieces. Notice how volume is the same, but the surface area where reactions can occur would increase.

These statements emphasize the importance of particle concentration and size in influencing reaction rates due to the likelihood of effective collisions.

Answer 2

⦁ One way to increase surface area of reactants is to _________ them in a liquid.
⦁ Another way to increase surface area is to crush a solid reactant into a _________.

Answer 3

Here are the completions for your statements:

1. One way to increase the surface area of reactants is to dissolve them in a liquid.

2. Another way to increase surface area is to crush a solid reactant into a powder.

These methods both enhance the exposure of reactant particles to one another, which can lead to increased reaction rates.

Answer 4

⦁ Use the graph below (also on page 6 of the lesson) to explain why reactant size and the rate of reaction is considered an inverse relationship.


⦁ What have you learned in this portfolio so far? What things can affect the rate of a chemical reaction?

Answer 5

Explanation of Inverse Relationship Between Reactant Size and Rate of Reaction

1. Graph Analysis: If you were to reference a graph indicating the relationship between reactant size (likely on the x-axis) and reaction rate (on the y-axis), you would typically observe that as the size of the reactant particles decreases (for example, from large chunks to finer powders), the reaction rate increases. This can be classified as an inverse relationship because when one variable increases (smaller particle size), the other variable decreases (reaction time taken for the reaction to occur).

2. Reason for Inverse Relationship: Smaller reactant particles have a larger surface area relative to their volume when compared to larger particles. This increased surface area allows for more effective collisions between reactant molecules, leading to a greater frequency of successful reactions. Conversely, larger particles have less surface area exposed to reactants, resulting in fewer effective collisions and thereby a slower rate of reaction.

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What I Have Learned in This Portfolio So Far

In this portfolio, I have learned about several key factors that can affect the rate of a chemical reaction:

1. Concentration of Reactants: Increasing the concentration of reactants increases the number of particles in a given volume, leading to more collisions and a potentially higher reaction rate.

2. Particle Size: As outlined, smaller particles have a greater surface area that makes them more reactive compared to larger particles.

3. Temperature: Higher temperatures typically increase the kinetic energy of molecules, leading to more frequent and more forceful collisions, which can increase reaction rates.

4. Presence of Catalysts: Catalysts can speed up a reaction without being consumed themselves, allowing reactions to occur more quickly than they would without the catalyst.

5. Physical State of Reactants: The physical state (solid, liquid, gas) can also influence how easily reactants collide with one another.

These insights underscore the complexity of chemical interactions and the various factors that chemists manipulate to control reaction rates in different contexts.

Answer 6

a little shorter response please

Answer 7

Explanation of Inverse Relationship Between Reactant Size and Rate of Reaction

The graph likely shows that as reactant particle size decreases (smaller particles), the reaction rate increases. This represents an inverse relationship because smaller particles have a larger surface area for collisions, leading to more effective interactions and a faster reaction rate. Conversely, larger particles have less surface area exposed, resulting in fewer collisions and a slower reaction rate.

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What I Have Learned in This Portfolio So Far

I have learned that several factors affect the rate of a chemical reaction:

1. Concentration: Higher concentrations lead to more collisions.
2. Particle Size: Smaller particles increase surface area, enhancing reaction rates.
3. Temperature: Increased temperature raises kinetic energy, promoting more collisions.
4. Catalysts: Catalysts speed up reactions without being consumed.
5. Physical State: The state of reactants (solid, liquid, gas) affects how they interact.

These factors are essential for understanding and controlling reaction rates in chemistry.