https://padlet.com/martina_donald1/6m777ry4aatoq7ka Explain simply ONE source of error in the method that may have impacted on the accuracy of the practical for the determination of chlorine in the swimming pool water. en-us 2022-02-08 09:15:51 UTC 2025-09-30 16:17:32 UTC hello@padlet.com martina_donald1 https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035030292 Then write a comment on the sources f error throughout the practical. Each person must identify 2.]]> 2022-02-08 09:21:40 UTC https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035030292 https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035043278 the colorimeter should be calibrated before use by placing a sample of water and pressing the reference button this ensures accuracy]]> 2022-02-08 09:29:19 UTC https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035043278 https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035044049 Glassware such as the test tubes may not be clean which could contaminate the chlorine with other chemicals and substances affecting the colour. If the cuvettes used in the colorimeter were used before and not clean there may be smudges which will interfere with the light shining through affecting the reading of the colour.]]> 2022-02-08 09:29:49 UTC https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035044049 30010968 https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035044103 Unclean cuvettes would effect the absorption of the solutions. 
If dionized water isn't fresh it could cause impurities. ]]> 2022-02-08 09:29:51 UTC https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035044103 https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035045288 when using the cuvette ensure that the rigid side is vertical and the clear side is horizontal this can affect the results ]]> 2022-02-08 09:30:35 UTC https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035045288 https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035046566 If the tablets were not fully dissolved it may affect the results]]> 2022-02-08 09:31:25 UTC https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035046566 andrewcallaghan12 https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035046876 0.01g of calcium hypochlorite may not have been weighted out accurately to 3 decimal points. 
The solutions may not have been measured out accurately which would mean that the solutions could be more/ less concentrated than usual which would affect the results]]> 2022-02-08 09:31:36 UTC https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035046876 https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035047086 Daria - the cuvette has to be clean and clear from smudges as absorbency would be affected as the light would not be able to fully shine through.
The colorimeter should also be calibrated between each use to ensure all results are accurate and correct ]]> 2022-02-08 09:31:45 UTC https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035047086 30010152 https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035048356 It must be checked that the cuvettes have been cleaned properly to ensure that they do not affect the passing colour.

The colorimeter must be calibrated with the use of fresh deionised water to ensure that to ensure that the results can be accurate ]]> 2022-02-08 09:32:32 UTC https://padlet.com/martina_donald1/6m777ry4aatoq7ka/wish/2035048356