CHEM INVESTIGATIVE PRJECT

Topics: Carbon dioxide, Calcium carbonate, Chlorine, Hydrochloric acid, Sodium bicarbonate, Sodium chloride / Pages: 2 (322 words) / Published: Jan 22nd, 2015
SBA:
DATE:
SKILLL: Planning and Designing
PROBLEM: Grandma suffers from heartburn. She usually uses Andrews salts but her pharmacist recommends tums.
HYPOTHESIS: Tums is more effective in treating heartburns that Andrews salts when used.
AIM: To determine the effectiveness of Calcium Carbonate and Sodium
Carbonate when used to treat heartburns.
APPARATUS: Measuring Cylinder, Beakers, Spatula, Conical Flask, Measuring Scale, Funnel, Dilute HCL, Calcium Carbonate (Present in Tums), Sodium Carbonate (Present in Andrews Salts), Petri Dish, Rubber Stopper, Gas Syringe
METHOD: 1. Wash all apparatus. 2. Measure and transfer 5g Calcium Carbonate to Petri Dish. 3. Measure and transfer 25cm3 of HCL to Beaker. 4. Place acid into conical flask and Calcium Carbonate and cover Immediately with rubber stopper to prevent gas from escaping. Apparatus should adopt the fashion below:

Diagram showing apparatus set up.

5. Allow gas to fully evolve from flask. Measure the gas collected in syringe. 6. Repeat steps 2-5 using the Sodium Carbonate. Tabulate results in table below.
COMPOUNDS
REACTION TIME/MINS
AMOUNT OF GAS COLLECTED
Calcium Carbonate

Sodium Carbonate

VARIABLES: 1. Control: Masses of Ca(Co3)2 and Na2Co3, Vol. of HCL and Conc. Of HCL. 2. Manipulated: Carbonates 3. Responding: Gas Evolution EXPECTED RESULTS: It is expected that Calcium Carbonate would have a faster rate of reactivity when being reacted with Hydrochloric acid and have a larger measure of gas collected than the Sodium Carbonate. The gas expected to evolve from the conical flask to the gas syringe in both reactions with the compounds is Carbon dioxide.
Equation involving Hydrochloric Acid and

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