data logging experiment

DATA LOGGER :

ACID-BASE TITRATION

Khodijah 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?

ACID-BASE TITRATION

EXPERIMENT

EMPOWER

The 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 required DrDAQ

Glass combination pH electrode.

One beaker (125 ml).

Magnetic stirrer-magnet bar

Air 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 PROCEDURE

Part 1: determination of unknown HClconcentration (standardization of HCl)

Part 2: determination of the concentration of sodium hydroxide solution

Part 3: determination of the content of sodium bicarbonate commercial baking powder

Part 4: determination of acetic acid content in vinegar

Part 5: comparison between the titration of acetic acid and HCl with NaOH:

THE SET UP OF EXPERIMENT

RESULT FOR THE EXPERIMENT

TITRATION CURVE OF SODIUM CARBONATE AGAINST HCL

TITRATION CURVE OF NAOH AGAINST HCL

Part 1 Part

2

TITRATION CURVE OF BAKING POWDER AGAINST HCL

TITRATION CURVE OF VINEGAR AGAINST NAOH

Part 3 Part 4

TITRATION CURVE OF HCL AGAINST NAOH

Part 5

ENHANCEMENT

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 constant

The respiratory centre (aka the lungs and

oxygen or carbon-dioxide carrying structures)

Kidney regulation

ACID-BASE BALANCING=TITRATION

IF PH LEVELS AREN’T BALANCED,

this can mean negative health outcomes that include:

Decreased growth factors

Growth hormone resistance

Mild hypothyroidism

Loss of muscle mass

Enzymatic changes in cells

Altered regulation of metabolites and minerals

Decreased uptake and release of oxygen