Lab Report

CHEMISTRY-1131 lab-1

CHEMISTRY 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: EQUIPMENTS        

Test-tubes Beaker Water-bottle Wax marking pencil A plastic funnel An eye dropper A scapula Graduated cylinder

CHEMICALS     

Tincture of Iodine Phenolphthalein Vinegar Rubbing Alcohol Water

CHEMICAL COMPOUNDS USED FOR IDENTIFICATION: FORMULA Na2CO3 NaHCO3 NaCl CaCO3 MgSO4 C12H20O12 CaSO4 H3BO3 NaOH (C6H10O5)n

CHEMICAL NAME Sodium Carbonate Sodium Hydrogen Carbonate Sodium Chloride Calcium Carbonate Magnesium Sulphate Sucrose Calcium Sulphate Boric Acid Sodium Hydroxide Cornstarch

COMMON NAME Soap Baking soda Table Salt Chalk Epsom Salt Table Sugar Drying agent Eyewash Drano

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 Measures Eye 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: Cornstar ch

CaSO4

Partially insolubl e Blue colour

Insolub le

Insolub le

Yellow color

Phenolphthal ein

_______

Vinegar

NaOH

Water soluble Iodine

CaCO3

Na2CO

NaHCO3

NaCl

MgSO4

H3BO3

NaOH

Sucrose

Solubl e

Soluble

Soluble

Soluble

Soluble

Soluble

Yellow color

______ _

_______

_______

_______

Partiall y Soluble _______

________

________

Yellow color

_______

_______

Pink color

No color change

______

No gas

No gas

______

Gas bubble s ______

Gas bubbles

_______

Gas bubble s _______

No color change No gas

No color change

No gas

No color change No gas

Pink color

No gas

No color change No gas

No ppt

White ppt

No ppt

_______

No ppt

Gas bubble s ______

3

No ppt

Unkno wn Sample #4 insolubl e

Rubbing alcohol

______

______

______

______

______

Does not dissolv e

______

Does Not dissolv e

_______

Does not dissolve

______

Heating

_______

______

______

______

_______

Dissolv es partiall y

_____

_______

______

Dissolve s complet ely

______

Ppt. - precipitate

Experimental 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 cornstarch Colour tests with iodine and phenolphthalein for CaSO 4, 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.