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# An experiment to investigate the amount of sulphuric acid there is in a solution

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Introduction

An experiment to investigate the amount of sulphuric acid there is in a solution Planning Aim: The aim of this investigation is to determine the concentration of acid rain by titrating the solution sodium carbonate. Apparatus: * Solid anhydrous sodium carbonate * Sulphuric acid (acid rain) * 250 cm � volumetric flask * 25 cm � bulb pipette * 250 cm � conical flask * burette * small filter funnel * Weighing bottle * Glass rod * 100 cm � beakers (3) * Tit pipette * 25 cm � measuring cylinder * Distilled water * Balance * Methyl orange * Pipette pump * White tile * Clamp stand The method that I will be using to find out how much acid there is in a solution is titration. This is because in titration, one solution is added to another, in order to determine how much the two solutions have reacted with each other. It is them possible to calculate the concentration of one solution if the other has a know concentration. In this investigation I have to find out the concentration of the acid. As a result the solution with the known concentration has to be the sodium carbonate. The sodium carbonate will be added from the burette to the acid rain, which will be in the conical flask, in order to determine what concentration of acid rain reacting with a known concentration of sodium carbonate. ...read more.

Middle

Then allow the reading to stabilize. If you add to much sodium carbonate take great care removing it using the spatula. If you accidentally drop any of tit around the balance remove it. Then put the 2.65g of sodium carbonate into a 100cm � beaker of distilled water and stir it using a glass rod. Avoid splashing when stirring. Make sure that all of the substance is used in making the solution by washing the weighing bottle repeatedly several times until none of the substance is remaining on it. Transfer the washings to the beaker each time. Keep stirring the solution with a glass rod until all of the sodium carbonate has dissolved in the water. Once the entire solid has dissolved, rinse the glass rod with distilled water, in order to remove any of the solution that is still on it. After that transfer the solution in the beaker into the 250cm � volumetric flask using a small filter funnel to pour it out without any spillage. Keep pouring the solution until it is a few centimetres away from the graduation mark, then fill slowly using a tit pipette until the bottom of the meniscus is level with the graduation mark. It is important that you read the volumetric flask at eye level with the bottom of the solution's meniscus and take the reading from this point to avoid any inaccurate reading of the meniscus. ...read more.

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2. ## How to find the accurate concentration of the Sulphuric Acid.

would have affected the results if excess Sulphuric Acid had dropped into the burette, causing an incorrect titre reading. Also, the reading of the burette caused difficulty, to read the exact volume and also if excess acid had dropped in, then this would have affected the reading, which would affect the calculations.

1. ## Titration to analyse a solution of dilute sulphuric acid, and calculating the concentration of ...

in the conical flask by 10, this is because 250 divided by 25 = 10. So the number of moles that have been used in the standard solution are 0.0025 moles. Now by looking back at the equation I can see that 1 mole of sodium carbonate reacts with one mole of sulphuric acid.

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Make sure to add the acid up to the desired starting point; in this case it is 0ml .8.A small volume (2-3ml) of sulphuric acid should be released from the burette and transferred into a waste beaker, this is to make sure there is no air bubbles present in the

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If this happened you are going to have to start the entire experiment from scratch. 20. If the colour change is still not apparent, add approximately 1-2 drops of sulphuric acid to solution. After each drop being added, shake the solution to make that the acid has been fully diluted.

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For this type of titration the indicator needed is called the methyl orange indicator (i). Appartus: Clamp stand White tile Methyl Orange Indicator 50cm3 burette 25cm3 pipette 250cm3 conical flask Pipette filler Magnifier glass 50cm3 small Beaker Standard solution Sulphuric Acid Distilled Water Method: 1 Wash out your burette with distilled water.

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12. Let the sulphuric acid run through and swirl flask until you get within a few cm3 within the rough titration. Now slowly let the sulphuric acid drop into the sodium carbonate until it changes colour. 13. Once it has changed colour, swirl it around and leave to stand for 10 seconds.

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