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.