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The higher the concentration of H202 the faster the rate of the reaction, so the less time it will take for 80cm3 to be collected in the gas syringe.
Member rating: No Rating | Words: | Submitted: Tue Aug 12 2003
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Chemistry Coursework Planning Method: 1. Place the desired concentration of hydrogen peroxide and water into a conical flask. 2. Add 1.00g of manganese dioxide into the flask. 3. Connect a gas syringe to the flask. 4. Find out how long it takes for 80cm3 of oxygen to be collected and record the time. 5. Repeat the experiment using 10 different concentrations of H202 and H20 and make sure they do not exceed 100cm3 in total, twice to gain a more accurate result. Safety: Safety glasses and a lab coat must be worn at all times. This is because manganese dioxide and hydrogen peroxide are hazardous substances. Hydrogen peroxide is harmful if it touches your skin or if it is swallowed. The same precautions apply to manganese dioxide. Apparatus: Measuring cylinder, Stop clock, Conical flask, Hydrogen peroxide, Water, Gas syringe, Manganese dioxide, Balance, Spatula, Retort stand. Diagram: Prediction: I think that the...
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