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chemistry preliminary
Member rating: No Rating | Words: 644 | Submitted: Sat Dec 15 2007
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Preliminary Investigation Aim To determine the best acid concentration to use for the reaction between dilute hydrochloric acid and marble chip powder at room temperature Equipment * Conical flask * Measuring cylinder * Distilled water * Stopwatch * 0.5g of marble chip powder * Hydrochloric acid (25cm³) Method * Collect all the equipment needed to carry out the experiment * Measure the volume of acid (25cm³), and the volume of water alternating from 0cm³, then 10cm³, 20cm³, 30cm³, 40 cm³ and finally 50cm³ * Weigh the 0.5g of marble chip powder * Pour the distilled water and hydrochloric acid into the conical flask * Get a partner ready with a stopwatch * Put the marble chip powder in the conical flask * Start timing * Stir the mixture thoroughly 3 times * When there is no powder visible in the flask, stop timing * Record the results on the results table Result Table Volume of acid (cm3 ) Volume of water (cm3) Time taken for fizzing to stop (sec) 25 0 08:16 25 10 11:15 25 20 13:78 25 30 15:22 25 40 49:10 25 50 74:43 SConclusion From my results I can...
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