assignment presentation data logging

DATA-LOGGINGACID-BASE TITRATION USING PH SENSOR

NAME: KESAVARTINII A/P BALA KRISNAIN (D20101039444)

CYPRIANA CAYAUS (D20101037509)

BRENDA MITCHELLE MORRIS (D20101037527 )

GROUP : A

PROGRAMME : PENDIDIKAN SAINS

SEMESTER : 5

LECTURER : EN. AZMI BIN IBRAHIM

DATA LOGGING

The process where computer used to collect data through sensors, data analyzed and

saved, and the results of the collection and analysis become

the output.

The data logger is the electronic instrument that records the

measurement over time.

COMPONENTS OF DATA LOGGING SYSTEM

Sensors- Sensor is device

that measure physical quantity

and send the data in terms of voltage to

the computer to represent the

quantity

Computer- used to record

the data and display the data as table or graph by

using specific software

Interface-used to connect between sensors and

computers,-responsible for converting the voltage from sensor into digital voltage that can be read

by the computer and prevent excessive voltage that can damage the computer

ADVANTAGES AND DISADVANTAGES

Advantages 1.New innovative

experiments and dangerous experiments become possible

2.More accurate result as there is no possibility of human error

3.Easier to understand scientific experimentation and scientific concept, and better graphing.

Disadvantages

1. If the data logging equipment breaks down, some data could be lost and not recorded

2. Equipments needed in data logging are very expensive even if it is just for a small task

3. Caused loss of conventional methods of data collection and reduced the practice of graphing skills

ENGAGE

What we know about acid and bases?Acids- Level of pH: 1 to 6- Example: Lemons, orange juice and vinegar are

examples of acids.

Bases- Level of pH: 8 to 14- Example: Mustards and medicines are examples of

a base. Flavor is added to medicines to offset the bitter taste.

Water- Level of pH: 7, Natural

EMPOWER ACID-BASE TITRATION USING PH SENSOR

Planning and doing experiment

PLANNING AND CARRYING OUT EXPERIMENT

Interface

Data logger

RESULTS

FIRST DERIVATIVES OF DATA

QUESTIONS 1. What does the graph tell you about the amount

of hydrochloric acid and sodium hydroxide needed for the titration?

2. What does the first derivatives graph represents?

3. Explain the difference between an endpoint and equivalence point in a titration.

4. Can we titrate a solution of unknown concentration with another solution of unknown concentration and still get a meaningful answer? Explain.

5. What is the chemical equation involved in this acid-base titration?

ENHANCE1. Citric acid - Plays a role in one famous stomach remedy, or

antacid. - Antacids are more generally associated with

alkaline substances, used for their ability to neutralize stomach acid.

Example : The fizz in Alka-Seltzer;

2. Aluminum hydroxide -Is an interesting base, because it has a wide

number of applications, including its use in antacids.

- It reacts with and neutralizes stomach acid (Hydrochloric acid, HCl).

Example: found in commercial antacids such as Di-Gel™, Gelusil™, and Maalox™(relief of heartburn and acid indigestion).

Di-gel, Gelusil, Maalox

3. Baking soda (sodium bicarbonate and sodium hydrogen)

- Use in baking and other application such as in Alka-Seltzer (addition of citric acid to improve the flavour), fighting fires (smoothers flames by obstructing the flow of oxygen to the fire)

- Baking Powder = Baking soda + weak acid = carbon dioxide

(causes dough and batters to rise)

QUESTION : Why Stomach Acid might need to be

neutralized? substance inside the body that is able to digest

the living tissue around itrequire some of it to be neutralized.

when the acid leaks upward through a valve into the oesophagus, causing what is known as acid reflux or heartburn.

heartburn is when the stomach acids get into the oesophagus and eat away at the lining, causing a burning sensation in the chest and throat.

to reduce the leakage of stomach acid into the oesophagus, neutralization of some of the acid would be required, avoid the oesophagus receives permanent damage. In order to do this antacids

-THE END-

-THANK YOU-