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D1 Unit 4

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Submitted By mahnoori97
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BTEC LEVEL 3 APPLIED SCIENCE
GROUP A, MAH NOOR, 40033495
Standard Solution: * There may have been a random error whilst the titration, it has a random effect on the results, some are higher than the average value while others are lower. One of the main sources of random error is in the equipment we use in making measurements. Random errors of this type are always present and cannot be eliminated, they are a result of limitation inherent in the equipment we use and are out of our control. Some random errors can be eliminated or at least reduced. For example, we were weighing a sample of a chemical (Sodium Carbonate) near an open window. The draughts of air from the window would move the balance pan up and down, thereby decreasing or increasing the mass measurement in a random fashion. By closing the window or by surrounding the pan with a draught excluder, this random error could be eliminated. * There may have been an error whilst making standard solution, the error indentified was not mixing the standard solution properly and also not ensuring that all of the solute was transferred, because 1.5g of sodium carbonate was added to the volumetric flask and then a little bit of water was added and then we swirled the volumetric flask to dissolve the solute in the water and then added distilled water up to the line and left it, to further ensure the solute was mixed into the water and all of it was transferred properly we could have added the solute into a beaker first and using distilled water rinse the boat the sodium carbonate was measured in, into the beaker ensuring all the solute is transferred and then swirl the beaker and then use a glass rod to ensure the mixing of the solute and water properly, after that when adding the solution into a volumetric flask using a funnel we could rinse the beaker 2-3 times to ensure there was no solution left behind

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