data logging experiment

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DATA LOGGING experiment

DATA LOGGER : ACID-BASE TITRATIONKhodijah bt Ahamad Ariffin (D20101037507)Nur Azuaniza bt Hasnan (D20101039445)Siti Hafsah bt Hj Mohtar (D20101037434)ENGAGEMENTWhat the taste of soap and lemon?What about the pH value?


EMPOWERThe objectives of this experiment are manifold:1)To construct acid-base titration curves in a very similar way to that offered by automatic titrators.2)To learn some of the principles associated with acid-base titration curves by using DrDAQ as an educational tool.3)To use the generated titration curves to determine the concentration of some analytes in common samples such: as acetic acid in vinegar, and sodium bicarbonate in baking powder.

Equipment requiredDrDAQGlass combination pH electrode.One beaker (125 ml).Magnetic stirrer-magnet barAir pump (JUN ACO 9903) (can demonstrate the validity of the experiment) for higher accuracy and reliability a peristaltic or syringe pump is preferred.Tygon Tubing. 1 l glass bottle with tight lid.0.1 mol/l HCl. 0.1 mol/l NaOH. 0.1 mol/l Na2CO3.Vinegar.Graduated cylinder, 25 ml.5 ml graduated pipette.25 ml pipette.

The procedurePart 1: determination of unknown HCl concentration (standardization of HCl)Part 2: determination of the concentration of sodium hydroxide solutionPart 3: determination of the content of sodium bicarbonate commercial baking powderPart 4: determination of acetic acid content in vinegarPart 5: comparison between the titration of acetic acid and HCl with NaOH:

6The set up OF experiment

Result for the experimenttitration curve of sodium carbonate against HCltitration curve of NaOH against HCl

Part 1Part 2titration curve of baking powder against HCltitration curve of Vinegar against NaOH

Part 3Part 4

titration curve of HCl against NaOH

Part 5ENHANCEMENT do you like to eat?

Is the ph value for every foods is same?To guard against acid loads from food consumption and tissue metabolism, we have 3 main regulatory systems:Buffer systems that work in cellular fluid and the bloodstream to keep pH constantThe respiratory centre (aka the lungs and oxygen or carbon-dioxide carrying structures)Kidney regulation

Acid-base balancing=titration

If pH levels arent balanced,this can mean negative health outcomes that include:Decreased growth factorsGrowth hormone resistanceMild hypothyroidismLoss of muscle massEnzymatic changes in cellsAltered regulation of metabolites and mineralsDecreased uptake and release of oxygen