assignment presentation data logging
Post on 22-Oct-2014
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TRANSCRIPT
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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
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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.
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COMPONENTS OF DATA LOGGING SYSTEM
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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
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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
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ENGAGE
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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
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EMPOWER ACID-BASE TITRATION USING PH SENSOR
Planning and doing experiment
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PLANNING AND CARRYING OUT EXPERIMENT
Interface
Data logger
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RESULTS
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FIRST DERIVATIVES OF DATA
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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?
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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;
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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).
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Di-gel, Gelusil, Maalox
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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)
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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
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-THE END-
-THANK YOU-