Chemistry Candle Lab Report Analysis by joshnhaupt


									                                 Analysis Sheet

● Objective 1
    ○ To get the qualitative data listed below, we measured the candle before
        burning from top to bottom, both with and without the wick to get its height.
        We also weighed the candle to get its proper weight. Then, after burning,
        we took these same measurements again.
    ○ We observed that the candle, before burning for 30 seconds, was taller
        and heavier than it was after burning.
    ○ The fuel from the candle wax was burned off during combustion causing
        the candle to lose height and weight (see graph below).

● Objective 2
    ○ To prove that oxygen from the air is required for the candle to burn we put
        the candle in a beaker and then lit it. After that we put a flask over the
    ○ We observed that the flame went away after we put the flask over the
    ○ The flame went out because the flask cut off the its oxygen supply, and
        oxygen is required for a combustion reaction to occur.
● Objective 3
    ○ To prove candles produce CO2, which is the same gas that we exhale as
        we breath, as the burn we poured 40 mL of pre-boiled water into two
        plastic cups using a 50 mL beaker. Then we poured ten drops of phenol
        red indicator to each cup and stirred both cups with a straw. After that we
        had one person blow into one of the cups with the straw for 1 minute.
    ○ We observed that the water in the cup that was blown into turned red and
        then orange, while the cup that was not blown into stayed the same.
    ○ The reaction between CO2 and the phenol red solution caused the water
        in the cup that was blown into to turn orange.
● Objective 4
    ○ To prove candles produce H2 O we first lit a candle. Then we created a
        sack out of aluminum foil to hold the ice in by folding a piece of foil into a
        square and then folding to corners in. We then filled the sack with ice and
        folded the corners together. After that we just held the sack over the
        candle flame.
    ○ After a while, we observed that there was condensation on the bottom of
        the sack, which indicated that H2 O had been formed from the combustion
    ○ A candle flame is a combustion reaction, and H2 O is a product of all
        combustion reactions. The aluminum foil sack filled with ice cooled down
        the water vapor that was being created by the combustion reaction,
        turning it into liquid water that we could see.
● Objective 7
● Objective 6
    ○ To prove that you do not have to touch the wick of a candle with a flame to
        relight it after it had just been extinguished, we lit a candle, let it burn for
        one minute, and then extinguished it. Quickly after we extinguished the
        candle, we touched the smoke around the wick with a lighter flame.
    ○ We observed that the candle re-lit, without the lighter’s flame touching the
    ○ The candle re-lit because the flame from the lighter traveled down the gas
        around the candle to the wick, relighting it.

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