A titration to determine the ratio of moles of Sulfamic acid to Sodium Hydroxide in a neutralisation reaction

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Glen Musgrove         17/12/02                                                     

A titration to determine the ratio of moles of Sulfamic acid to Sodium Hydroxide in a neutralisation reaction

Aim

To determine the stoicheometric relationship between Sulfamic acid and Sodium Hydroxide in a neutralisation reaction, hence finding the bascity of Sulfamic acid.

Hypothesis

I predict that the ratio of moles of Sulfamic Acid and Sodium hydroxide will be 1:1 and they will react like this:-

Safety

When carrying out this practical wear safety glasses at all times.

When filling the burette hold the funnel slightly above the rim so as to break the seal allowing air to leave and fluid to replace it instead of the funnel filling up.

The above helps to prevent you over filling the burette and it spilling over. Always fill the burette after moving it lower down so that if it does spill over it does not pour onto you or into your eyes.

                                                                                   

Wash your hands thoroughly after handling any Acids or Bases.

Do not rub your eyes or put your hands or fingers in your mouth at any point during the experiment.

Do not sit at the desk as this may prevent you moving in the event of a spillage.

Equipment List

>Safety glasses

>50 cm3 Burette.

>25 cm3 Pipette.

>Pipette filler.

>250 cm3 Graduated flask.

>Conical flask.

>Boss clamp and Stand.

>White tile.

>Beakers.

>Small pipette.

>Distilled water dispenser

>Solid Sulfamic Acid.

Method

Part 1: creating Sulfamic Acid solution

>Place small beaker onto scales then zero/reset the scales.

>Measure between 2.500 and 3.00 grams of Solid Sulfamic Acid. (Record weight exactly)

>Tip Solid into 250 cm3 graduated flask, rinse the remaining solid into the flask                                  with distilled water and a funnel.

>Rinse funnel and then neck of flask into the flask as well to ensure all of the solid enters the vessel.

>Fill with a beaker of distilled water and a funnel the flask to about 2 cm below the measuring line.

Join now!

>Using the small pipette fill drop by drop holding the line at eye level until the bottom of the meniscus just touches the line.

>Put the stopper in and holding your thumb over the top of it shake until all of the solid dissolves and a clear liquid is formed.

Part 2:filing burette

>Make sure nozzle is closed and burette is clamped securely.

>Fill with NaOH to above the 0 point but below the top with a beaker and funnel.

>Remember to hold the funnel above the rim and to remove it afterwards.

>Place a waste beaker ...

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