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Worksheet10th GradeLevel 3 · Challenge

Free 10th Grade Rates of Reaction and Collision Theory Worksheet

Students use collision theory to explain how temperature, concentration, surface area and catalysts change the rate of a chemical reaction. They calculate average rates from gas-volume data for marble chips reacting with acid, interpret the shape of a rate graph, apply the rule that a 10 °C rise roughly doubles the rate, balance the equations involved and design a fair test.

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Grade
10th Grade
Subject
Science
Topic
Mixtures & Chemical Reactions
Difficulty
Level 3 · Challenge
Estimated time
45 minutes
Curriculum
Texas grade levels (TEKS)
Questions
16
Answers
Included, with working
Format
PDF (A4), print or complete online

Students will practice

  • explaining reaction rate using collision theory
  • predicting the effect of temperature, concentration, surface area and catalysts
  • calculating average rates of reaction from data
  • interpreting the shape of a rate graph
  • designing a fair test for a rate investigation

Curriculum: Texas grade levels (TEKS). We show specific outcome codes only where they have been verified against the official curriculum document.

What's next?

Completed: Rates of Reaction and Collision Theory

  1. 1The Reactivity Series and Displacement Reactions

How to use this worksheet

  1. Print the PDF or complete it on screen. Write the student's name and date at the top.
  2. Read the instructions for each part together before starting. Encourage working to be shown.
  3. Mark with the answer sheet. Use the model answers and success criteria as a guide rather than a single right answer.
  4. Record the score, celebrate what went well, then follow the "What's next" suggestion.

Common questions

Who is this worksheet for?

10th Grade students (typically ages 15–16) working on mixtures & chemical reactions. It is pitched at level 3 · challenge.

Are the answers included?

Yes. The PDF includes a full answer sheet with model answers and success criteria where there is more than one good answer. You can also view the answers online.

How long does it take?

About 45 minutes for 16 questions. Short, regular sessions work best: two or three a week beats one long one.

Do I need to sign up to download?

No. Click Download Free PDF and it opens immediately. It is free for personal, classroom and homeschool use.

What should we do next?

Try The Reactivity Series and Displacement Reactions.

Preview

Success TutoringWorksheets10th Grade · Science · Mixtures & Chemical Reactions

Rates of Reaction and Collision Theory

Name

Date

Score /

More frequent, more energetic collisions mean a faster reaction.

Part A: Collision theory

Collision theory: particles can react only when they collide with enough energy (the activation energy) and in the right orientation. Anything that makes successful collisions happen more often increases the rate of reaction.

The rate increases with higher temperature, higher concentration (or pressure for gases), greater surface area (smaller pieces) and the use of a catalyst.

1.State the two conditions needed for a collision between particles to result in a reaction. (answer space)
2.Why does increasing the temperature increase the rate of a reaction?
  1. AParticles become larger
  2. BParticles move faster, collide more often and more collisions have enough energy to react
  3. CThe activation energy increases
  4. DMore product is made in total
3.Explain, using collision theory, why powdered marble reacts faster with acid than the same mass of marble chips. (answer space)
4.Explain why increasing the concentration of an acid increases the rate of reaction with magnesium. (answer space)
5.What is a catalyst, and how does it speed up a reaction? (answer space)
6.A catalyst increases the total amount of product made in a reaction. ☐ True   ☐ False

Part B: Measuring rate

Marble chips (calcium carbonate, in excess) react with hydrochloric acid, producing carbon dioxide gas, which is collected in a gas syringe.

Volume of gas (cm³) — 0 s: 0 · 10 s: 24 · 20 s: 40 · 30 s: 50 · 40 s: 55 · 50 s: 56 · 60 s: 56

Average rate = amount of product formed ÷ time taken.

7.Balance: CaCO₃ + HCl → CaCl₂ + H₂O + CO₂ (answer space)
8.Calculate the average rate of reaction over the first 20 seconds.
9.Calculate the average rate between 20 s and 40 s.
10.The reaction finished at 50 s. Calculate the average rate for the whole reaction.
11.Explain why the reaction slows down and then stops. (answer space)
12.The experiment is repeated with acid at the same volume but double the concentration, with marble chips still in excess. Describe how the results would differ. (answer space)
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Preview — the PDF contains the full resource and answer sheet.

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About this resource

Created by
Success Tutoring Science Team
Last reviewed
1 October 2026
How it was made
Written by our team

Free to print and share for personal, classroom and homeschool use. Please don't resell. Spotted an error? Let us know.