Rates of Reaction Core Practical

Year 10 Science Duration: 50 minutes Investigating marble chips and acid reaction

Do It Now - Retrieval Practice

Write down the main steps to measure reaction rate using marble chips and acid Think about: Equipment needed, Safety considerations, What we measure 2 minutes - then share with a partner

WALT - We Are Learning To

Review the core practical method for measuring reaction rates Create clear, organised results tables with correct units Analyse typical results and identify patterns Practice exam-style questions effectively

Success Criteria

I can explain the method for gas collection from marble chips and acid I can construct a results table with proper headings and units I can describe typical patterns in reaction rate data I can answer exam questions using correct scientific terminology

Key Vocabulary

{"left":"Rate of reaction - How fast a chemical reaction happens\nReactants - Starting substances that react together\nProducts - New substances formed in the reaction","right":"Concentration - Amount of substance dissolved in solution\nSurface area - Exposed area of solid that can react\nCatalyst - Speeds up reaction without being used up"}

Core Practical Method

Equipment and Safety

Conical flask and rubber bung Gas syringe or measuring cylinder Marble chips (calcium carbonate) Dilute hydrochloric acid Safety: Wear goggles, handle acid carefully Ensure good ventilation in lab

Creating Results Tables

Work individually to create a results table Include: Time (seconds) and Volume of gas (cm³) Remember: Clear headings, correct units, neat layout Use the template provided for support

Typical Results Graph

Understanding the Graph

Why does the graph start steep then level off? What does a horizontal line at the end mean? How would increasing acid concentration change this graph?

Factors Affecting Reaction Rate

Temperature - Higher temperature = faster reaction Concentration - More concentrated acid = faster reaction Surface area - Smaller chips = larger surface area = faster reaction Catalyst - Speeds up reaction without being used up

Exam Practice Time

Complete the exam-style questions on your worksheet Work in pairs - support each other Focus on command words: explain, describe, calculate 15 minutes for questions, then peer marking