Qualitative Observation Of A Chemical Reaction Lab Report

Qualitative Observation of a Chemical Reaction Purpose: Carefully observe and interpret a chemical reaction. Apparatus: Equipment- 250mL beaker, 125mL Erlenmeyer flask, cardboard square, chemical scoop, metric ruler, lab countertop, rubber stoppers, safety goggles, lab apron Materials- candle ( 2cm diameter), matchbook, 2 toothpicks, Limewater solution, string, aluminum foil, Cobalt Chloride paper Procedure: Note appearance, odor, and feel of the unlighted candle. Heat the bottom of the candle and secure it to a cardboard square on your lab counter. Light the candle and allow it to burn for several minutes. Note any changes. Briefly describe the burning candle. Blow out the flame and immediately place a lighted match in the â€Å"smoke†Ã¢â‚¬ ¦show more content†¦- During: The wax began dripping down the sides of the candle once the wick was lighted. The flame was blue at the bottom and ombred up to yellow at the top of the flame. The flame was jumpy and not steady. - After: Liquid wax was puddled around the wick of the candle. - Results: When a lighted match was held 2cm away from the unlighted candle in its smoke, the flame would jump from the match to the wick having been carried by the smoke. Test 2 (procedure 4) - Before: There were more wax drips down the sides of the candle. - During: The liquid wax was exposed to the heat of a lighted match. - After: The liquid wax underwent a physical change after being exposed to the heat of the match. - Results: When liquid wax is exposed to the heat of a match, it transforms back into its original solid state. Test 3 (procedure 5) - Before: The area around the wick was all solid wax instead of liquid wax as in previous tests. The wood toothpick was placed in the solid wax around the wick. - During: The toothpick was lighted using a match and began to burn, but not for very long. - After: Only the top of the toothpick was burnt. The candle remains in the same shape as it was at the beginning of the test. - Result: Once the toothpick had been lighted, the flame went out before it hit the body of the toothpick. Only the tip of the toothpick had been exposed to theShow MoreRelatedMatter And Chemical Characteristics Of The Unknown Powders826 Words   |  4 PagesSeptember 23rd, 2014 Matter Qualitative Lab Report Purpose:- The purpose of the lab is to perform series of tests to determine the physical and chemical characteristics of several unknown powders, and then use that information to classify the unknown powders. Hypothesis:- I believe that by testing substances with various chemicals, for example, vinegar, iodine and that will help to find out what the substance is and what is it quality. 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