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Introduction

Introduction: There is one type of quantitative analysis used which is Titration. The experiment which I am undertaking is finding out the volume of HCL needed to neutralise (1 mol dm -3) NaOH. I will then make a brief record on the results. Safety Points: > Do not play around when doing the experiment. > Never run in the laboratory. > Avoid contact with chemicals used. > Never smell dangerous chemicals. > Never leave bottles open. > Always wear a pair of safety goggles. Materials: > Pair of Safety goggles > Phenolphalein indicator > Sodium Hydroxide Solution (1 mol dm -3) > Clamp > Stand > Graduated pipette > Conical flask > Burette > Hydrochloric acid Method: * I rinsed out a 25 cm3 graduated pipette with sodium hydroxide solution (1 mol dm-3). * I used a pipette to measure out 25 cm3 of sodium hydroxide solution (1 mol dm-3) ...read more.

Middle

* I titrated it slowly with the NaOH solution constantly stirring and adding 2-3 drops at a time. * When the acid began to change colour I added the acid 1 drop at a time. * When the liquid became clear I stopped adding the hydrochloric acid and recorded the volume to the nearest 0.05cm. * I repeated the process three times until I had three recordings. If the solution turned yellow then I would have added too much acid. I would then have to retitrate it by using a graduated pipette and adding 1 drop of hydrochloric acid at a time. * The tricky part was adding the acid, because I had to stir the solution every time I added few drops of hydrochloric acid. Evaluation: One crisis which I came across was that I had to repeat the process to get an accurate reading. ...read more.

Conclusion

to the positive electrode, or anode. As a result, electric current flows between the electrodes. The strength of the current depends on the electric potential between the electrodes and the concentration of ions in the solution. Therefore, this instrumental quantitative method, called conductometry, is often used to measure the ion concentration in a solution. In a related technique, electrodes specially constructed to accept only specific ions are used to determine the sodium ion or calcium ion concentration or the pH of the solution being analyzed. This is different from my method because I didn't have time to do the electrochemical technique and didn't have the correct equipment for it. So therefore I used a rapid and accurate technique to get my results. Safety features used in industries: * Fire alarm * Fire extinguisher * Eyewash station * Safety shower * Exit, Exit Route * Space for Waste: o Biohazardous waste disposal site o Radioactive waste disposal site o Chemical waste disposal site ?? ?? ?? ?? Jetesh Kerai 10T ...read more.

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