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Introduction

Transfer-Encoding: chunked My aim of this experiment is to find out the concentration of NaOH by titration with standard o.1dm3 Hcl solution. * The Set up equipment was Set up * Add 25.00 ml of orange juice to a 125 ml Erlenmeyer flask. * The burette was rinse with a small volume of the Hcl solution and then fills it. * The Titrate has been continued until the endpoint was reached by added Hcl solution and the colour was persists longer than 20 seconds.) * Record the final volume of NaOH solution * The titration repeated until the three measurements that agreed to within 0.1 ml. Calculation: NaOH +Hcl Nacl +OH +H2o Using the equation 1 mol of NaOH react with 1 mol of Hcl The mean titre = 23.90 +23.90 = 47.8 ÷2 = 23.9 cm3 ...read more.

Middle

In addition some of us they didn?t add the exact amount of Indicator (Phenolphthalein).So when they titrated with Hcl also added more than they need, therefore this affect the accurately of the result they didn?t observe any colour change. This error could be improved by making sure adding the exact amount of indicator or Hcl. A further weakness was that when the pipette filler was used on the pipette it was very hard to fill the pipette with NaOH and the air bubbles was in side of the pipette. This affected the accuracy of the result and the experiment was take long time to finish. To improve this error we should use alternative method or more developed pipette filler this because to get accurate result at less time. ...read more.

Conclusion

The data logging software will store the readings in a table and the data can later be analysed using graph tools automatically. The report can then be saved and widely distributed in different ways such as email, post and fax. While the manual it?s difficult to pass to an application or send it by email or fax and also it will be takes long time to pass. Using data logging equipment can take reading the results with high degrees of accuracy and also can be less human error. In addition we can take many readings in a short period of time during data logging is used. However, humans can make errors when taking the reading. Also the equipment that used with data logging is different from those in collecting manual data. This equipment used to monitor water levels would have to be waterproof for example so its need to be very robust ...read more.

This student written piece of work is one of many that can be found in our GCSE Aqueous Chemistry section.