In an experiment to determine the rate of reaction between marble chips (CaCO₃) and HCl, the volume of CO₂ produced is measured. Which factor would NOT affect the rate of CO₂ production?
Correct answer: D. Volume of the reaction flask
- A. Concentration of HCl
- B. Surface area of marble chips
- C. Temperature of the reaction
- D. Volume of the reaction flask
Explanation
The flask's volume does not affect the reaction rate, which depends on concentration, surface area, and temperature.
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About Experimental Techniques in Chemistry
Separation methods are selected according to differences in solubility, particle size, volatility and sublimation behaviour. Filtration and crystallisation separate insoluble or dissolved solids, sublimation isolates suitable volatile solids, distillation separates liquids by boiling point, and solvent extraction transfers a substance between immiscible solvents.
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