Vinegar :: essays research papers

Whos been cheating on the vinegar?Aim To investigate if the vinegars have been reduce by running(a) pop out their submersions.Scientific Backgroundacetum is an acid and there front can be neutralised by an alkali.Acid + Alkali coarseness + waterHydrochloric acid + Sodium Hydroxide Sodium chloride + waterVinegar is a weak acid and therefore it only partially ionises in solution.CH3COOH CH3COO- + H+An alkali such as Sodium Hydroxide has a formula NaOH. If the alkali is strong accordingly it ionises fully in solution.NaOH Na+ + OH-When the acid H+ reacts with the alkali OH- the solution neutralises.PredictionIf the acid has been diluted there willing be less H+ ions present in the volume used. Therefore to cancel the alkali to a greater extent acid will be required. This is on the assumption that the alkali volume and constriction remain constant.MethodMeasure 10cm3 of 0.1m alkali into a measuring cylinder then ordain the solution into a 75cm3 conical flask.Then summar ise 2-3 drops of index number to the alkali (it will go purple in colour)Measure out 50 cm3 of the vinegar into a measuring cylinder and then place into a glass beaker.Then using a dropper add the vinegar drop wise to the alkali until 1-drop changes the solution to colourless.Replace the vinegar back into the measuring cylinder and record the volume of vinegar used. accept this process twice more, recording results.Then repeat the whole operation for each different concentration of vinegar.Preliminary WorkAim- To shape out which concentration of alkali will give accurate, measurable values.Concentration(M) rule book of acid(cm3)0.1m 21.45cm30.5m 78.9cm30.75m 100+cm31.0m 100+cm32.0m 100+cm3We decided from the results that the best measurable concentration of alkali would be the 0.1m concentrations.InvestigationTest 1Test 2Test 3AverageManufacturers10.27cm310.3cm39.73cm310.11cm3Shop 110.3cm39.5cm310.25cm310.11cm3Shop 218.4cm317.9cm318.4cm318.23cm3Shop 340.1cm338.45cm335.7cm338.08c m3Analysis These results memorialize that the vinegar from Shop 2 and Shop 3 have been significantly diluted with water or some other substance. The results obtained from shop1 show that its is very similar in concentration to the manufacturers. Two of the results show that it is less punishing than the manufacturers, but one shows that it is more concentrated, this is impossible so its is most likely due to human hallucination and not taking the readings properly.ConcentrationsManufacturers= 110.11 = 0.0989119683Shop1 = 110.11 = 0.0989119683Shop2 = 118.23 = 0.054854635Shop3 = 138.08 = 0.026260504These results show an obvious difference in the concentration with the manufacturers being the most concentrated and shop 3s being the least concentrated.EvaluationThe results from this audition can be considered reasonably accurate we took the results quite accurately.