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The Life of Garibaldi

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Introduction

nge and record how many drops you used. � Get the clamp ready and place the tile on the clamp, then place the conical flask on the tile. Rinse your burette with your diluted HCl to replace any previous liquids which may intervene in the results. Now secure the burette to the clamp making sure the nozzle is facing in the conical flask. You should now have your apparatus set-up like this: 30/5230/35230/image006.gif"> Funnel Burette filled with diluted HCl Conical Flask Clamp Tile Ca(OH) and Indicator � Now everything should be ready. From your volumetric flask, empty out the diluted HCl into a normal beaker. Using this beaker fill the burette up to the 0 mark with a funnel. � Start titrating slowly until the solution has totally reacted. Then record the results noting how much HCl you used. Record the results in a suitable format and repeat the experiment at least three more time for more accuracy. Finally record the average (mean) titre. ...read more.

Middle

AnalysisJ Rough Accurate 1 Accurate 2 Accurate 3 Final burette reading cm3 37.3 37.2 37.1 37.3 Initial burette reading cm3 0 0 0 0 Volume used cm3 37.3 37.2 37.1 37.3 Mean titre cm3 37.3 37.2 37.1 37.3 This is the final part to the investigation. In this part of the investigation I aim to determine the final concentration of the limewater solution. I will go through my calculation step by step and explain what I am doing along the way. Starting off, lets look at what we have. The equation for the reaction is: 30/5230/35230/image001.gif"> Ca(OH)2(aq) + 2HCl(aq) CaCl(aq) + 2H2O(L). For the Ca(OH) we are trying to find the concentration in mol g dm-3. However we have the volume (10.0cm3 is how much we ... er solution. This would change the colour of the solution to light orange which would change to pink by the end of the titration. 5. After that I will place the flask onto a white tile placed on a clamp stand. ...read more.

Conclusion

100ml of the HCl solution into the burette Put 50ml of limewater into a conical flask using the pipette then add 5 drops of methyl orange to the solution, this should turn the solution a pale orange Open the ... .. . molarity 1dm3 = 10x10x10cm3 = 1000cm3 10.96 � 1000 x 0.125 = 0.00137 = 1.3 x 10 mol Concentration of limewater in mol dm3 2(Volume of acid cm3) x Molarity of acid = Volume of alkalai (cm3) x Molarity of alkalai 1000 1000 2 (10.96cm3 x 0.125) = 25cm3 x mo.Ca(OH)2 1000 1000 = 0.00274 Mol. Ca(OH)2 = 0.00274 x 1000 = 0.1096 mol dm3 25 0.1096 x 74.1(Molarmass) = 8.12gdm3 Evaluation My practical experiment went quite well and I got a variety of results, which were suitable for the task given. My results show that I got two identical results and one just 1.1cm3 off. Which suggests that I have been accurate and precise during the experiment. By being accurate it came about by specific apparatus I used, which restricted errors. However during the experiment I came across an array o ...... ...read more.

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