Chemistry-Marble chips + acid rate of reaction (most common)

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9 Terms

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What is the aim?

See how acid concentration affects rate of reaction

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Key method steps (mark points)

1. Add marble chips to acid in conical flask

2. Seal, connect to gas syringe

3. Start stop‑clock immediately

4. Record gas volume at regular time intervals

5. Repeat with different concentrations

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Main result

Higher concentration → faster reaction → more gas in same time

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One main error

Some gas escapes before stop‑clock starts

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One way to improve

Use a delivery‑tube bung; start timing the moment the bung is fitted

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Independent variable (CHIN)

Concentration of hydrochloric acid

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Dependent variable (MODE)

Volume of carbon‑dioxide gas produced

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A control variable

Mass marble chips (+temperature)

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