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“Rates” is a topic; “How does carbonate particle size affect initial CO₂ production at fixed mass, acid concentration and temperature?” specifies an investigation. Research the chemistry, feasible measurements and hazards before selecting a method. A source may inform the mechanism, apparatus or handling; record which claim each source supports rather than collecting unrelated links.
Video by Royal Society of Chemistry. Use this rates demonstration as a source to evaluate: identify the methods it supports and the claims it cannot establish for a new investigation.
Viewing focus: Evaluate sources and cite their contribution accurately
After watching, attempt these questions before opening the answers. You can also use the written lesson below.
After watching 1: What does the video contribute to a plan that measures gas production?
It supports apparatus choice, reaction-start considerations and continuous monitoring. It does not supply measurements for a different reaction or particle-size comparison.
After watching 2: Give two details you would record when citing this video and explain their purpose.
Record the creator and exact title to identify the work, plus its URL and access date so a reader can locate the same source and assess its context.
What you'll be able to do
“Rates” is a topic; “How does carbonate particle size affect initial CO₂ production at fixed mass, acid concentration and temperature?” specifies an investigation. Research the chemistry, feasible measurements and hazards before selecting a method. A source may inform the mechanism, apparatus or handling; record which claim each source supports rather than collecting unrelated links.
Use a mix of appropriate online and offline sources, such as the specification, a textbook section and a scientific or learned-society resource. A primary experimental report gives its own methods and results; a textbook or teaching video often explains an established method. Authority, publication context, relevant conditions and traceable evidence matter more than a confident presentation or high view count.
The Royal Society of Chemistry rates video demonstrates clock and continuous-monitoring approaches. Note what each signal measures, how reaction starts and which variables are controlled. It is useful method evidence, but it does not provide your own particle-size dataset or establish a numerical effect under conditions never investigated in the video. Cite its contribution as an apparatus or method explanation.
A workable citation records the creator or author, resource title, publisher or site, URL or publication details and an access date for online material. For example: Royal Society of Chemistry, “Rates of reaction – practical experiments | 16–18 chemistry”, YouTube video, https://www.youtube.com/watch?v=tWS_ohF543g, accessed 26 October 2026. Cite a textbook’s author, title, edition and relevant pages when used. Paraphrase with attribution; do not relabel a copied table as your measurements.
For the proposed carbonate investigation, control solid mass, chemical composition, acid concentration and volume, temperature and mixing while using defined particle-size fractions. Estimate maximum gas volume and choose suitable capacity. Measure a repeatable initial gradient with the same timing and collection method, and repeat independent samples. Explain how leaks, clumping or differences in exposed surface could affect interpretation.
Report raw observations with units, processing, exclusions and uncertainty. In the illustrative data, fine particles give rates 0.90, 0.94 and 0.92 cm³ s⁻¹ while coarse particles give 0.31, 0.35 and 0.33 cm³ s⁻¹. These values support a comparison in this design; they do not prove a universal threefold effect or a changed intrinsic rate constant. State what remains uncertain and propose a specific follow-up measurement. Keep a plan distinct from work actually completed under supervision.
Attempt these problems on paper before opening the worked reasoning. Explain your steps as well as giving a final answer.
Common mistakes to avoid
Key takeaways
Question 1: A learner cites a gas-syringe video as proof that their own carbonate rate must double. Evaluate that claim.
The source supports the method, not the learner’s unmeasured numerical conclusion.
Check the assessed scope and practical or mathematical requirements.
An external explanation or interactive activity to use alongside the lesson. It may include extension material.
Close the notes and answer from memory. Revisit any explanation you cannot yet reconstruct.
Test yourself
Answer a few questions, then review anything you missed.
Start with the quiz above to check the key ideas. You can also choose another topic from the practice library.