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CHEMISTRY-1131 lab-1CHEMISTRY LABORATORY REPORT
QUALITATIVE ANALYSIS OF TEN HOUSEHOLD COMPOUNDS DATE: 01/19/12 SUBMITTED TO: MORALES LEILANI SUBMITTED BY: PARIKH SNEH NAME OF PARTNER: PATEL CHINTAN
OBJECTIVE: To conduct qualitative analysis for the identification of 10 household compounds using simple chemical and physical tests and to identify the unknown compound.
METHOD: EQUIPMENTSCHEMICALS
Test-tubes Tincture of Iodine
Beaker Phenolphthalein
Water-bottle Vinegar
Wax marking pencil Rubbing Alcohol
A plastic funnel Water
An eye dropper
A scapula
Graduated cylinder
CHEMICAL COMPOUNDS USED FOR IDENTIFICATION:FORMULACHEMICAL NAME COMMON NAME
Na2CO3Sodium CarbonateSoap
NaHCO3Sodium Hydrogen CarbonateBaking soda
NaClSodium ChlorideTable Salt
CaCO3Calcium CarbonateChalk
MgSO4Magnesium SulphateEpsom Salt
C12H20O12SucroseTable Sugar
CaSO4Calcium SulphateDrying agent
H3BO3Boric AcidEyewash
NaOHSodium HydroxideDrano
(C6H10O5)nCornstarch
For the detail procedure refer to chemistry 1 (chem. 1131) laboratory manual page no 2-5.
Safety:BORIC ACID- Hazardous in case of skin contact (irritant), of eye contact (irritant), of ingestion, of inhalation.Handle the chemicals with care. Wear lap-coat and safety glasses while performing the experiment.First Aid MeasuresEye Contact:Check for and remove any contact lenses. Immediately flush eyes with running water for at least 15 minutes, keeping eyelids open.
Skin Contact:In case of contact, immediately flush skin with plenty of water. Cover the irritated skin with an emollient.
Observation:CornstarchCaSO4CaCO3Na2CO3NaHCO3NaClMgSO4H3BO3NaOHSucroseUnknownSample # 4
Water solublePartially insolubleInsolubleInsolubleSolubleSolubleSolubleSolublePartiallySolubleSolubleSolubleinsoluble
IodineBlue colourYellow colorYellow color___________________________________________________Yellow color
Phenolphthalein_____________________Pink colorNo color changeNo color changeNo color changeNo color changePink colorNo color change______
VinegarNo gas No gasGas bubblesGas bubblesGas bubblesNo gas No gasNo gasNo gasNo gasGas bubbles
NaOH__________________________No pptNo pptWhite pptNo ppt_______No ppt______
Rubbing alcohol______________________________Does not dissolve______Does Not dissolve_______Does not dissolve______
Heating________________________________Dissolves partially__________________Dissolves completely______
Ppt. - precipitateExperimental error- While carrying out the experiment, Boric acid did not dissolve in rubbing alcohol as per the flow chart and thus could not be identified.
DISCUSSION: Following are the ten compounds for which tests were carried out: Cornstarch, Calcium Sulphate, Calcium Carbonate, Sodium Carbonate, Sodium bicarbonate, Sodium chloride, Magnesium Sulphate, Boric acid, Sodium hydroxide and Sucrose.The identification tests included Solubility test for cornstarchColour tests with iodine and phenolphthalein for CaSO4, CaCO3, Na2CO3, NaoH.Gas bubble test with vinegar for CaCO3, Na2CO3, NaHCO3.Precipitation test with NaOH for MgSO4.Heating test for NaCl, Sucrose.
CONCLUSION:The qualitative analysis for the identification of 10 household compounds was conducted as per the flow-chart in the chem. lab manual.The unknown sample-4 was found to be CaCO3 because it is insoluble in water and gives gas bubbles with vinegar.