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Lab Report For Candle Lab

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In part A of the lab we had to melt a birthday candle in a test tube until it turned into liquid wax. We held the candle over a bunsen burner for about thirty second before it was completely turned to liquid wax. Here are some important measurements of part A. Before heating the candle weighed one gram, and the test tube and beaker weigh 40.2 grams. Then after heating, the test tube, beaker, and candle weighed 41.2 grams all together. Which then means that the candle weighed one gram after heating. Therefore, the candle’s mass stayed the same, and part A demonstrated a physical change since the candle could be put back into its original state if someone tried very hard to do so. Part B however, was a little bit different. In this experiment
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Introduction The purpose of this Lab was to identify the density of the unidentified object and determine what substance the unidentified object given by the teacher was. The density calculated in the experiment will stay the same because the density of the unidentified object will stay constant. The Independent Variable of this experiment was the calculated density and the unidentified object given. The Dependant Variable for this experiment was the density.

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The lab started off by measuring critical materials for the lab: the mass of an an empty 100 mL beaker, mass of beaker and copper chloride together(52.30 g), and the mass of three iron nails(2.73 g). The goal of this experiment is to determine the number of moles of copper and iron that would be produced in the reaction of iron and copper(II) chloride, the ratio of moles of iron to moles of copper, and the percent yield of copper produced. 2.00 grams of copper(II) chloride was added in the beaker to mix with 15 mL of distilled water. Then, three dry nails are placed in the copper(II) chloride solution for approximately 25 minutes. The three nails have to be scraped clean by sandpaper to make the surface of the nail shiny; if the nails are not clean, then some unknown substances might accidentally mix into the reaction and cause variations of the result.

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The candle was 7.15 cm tall and 8.647 g; the burn rate was 3.65 mm/min and 0.062g/min, which means that the bent wick contributed to the larger height decrease, and the mass still steadily decreased. In burn 4, the same processes happened as burn 1, but more black spots formed due to combustion, the wax was pulling up at the base of the wick, and the wick curled more. The candle was 6.85 cm tall and 8.532 g; the burn rate was 1.5 mm/min and 0.058g/min, which means that the mass and the height decreased at a steady rate.

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After we put the substance on the burner, we weighed it. Each time after we put it on the burner came with the exact same number: 21.16 grams. After we found the mass of the crucible, cover, and hydrated sample, and the mass of the crucible, cover, and dehydrated sample, we subtracted the two values to get the mass of water evolved: 0.24 grams. Then, we subtracted that value to the mass of the hydrated sample to get the mass of the dehydrated sample: 0.76 grams.

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Analysis: In this experiment, the candles were burned at the same time. Background info: A candle is a block of wax with a wick in the middle of the candle. Candles give of light and a little bit of heat. It is also used as a method of keeping time.

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It took a little while, but soon the water started rising into the glass cover. 7. The data is recorded in a data table, and this experiment was replicated 3 other times. 8. The other candles were also later after the one candle was lit.

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Therefore, the more Oxygen in the air, the longer the candle will burn. Under a beaker with inhaled air, the candle burned 2.3 seconds longer than under a beaker with exhaled air. This proves that there is more Oxygen in inhaled air than exhaled air. Also, there is more Carbon dioxide in exhaled air than in inhaled air. That can be proven by a lab performed.

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The purpose of this experiment is to observe the characteristics colors produced by certain metal ions when vaporizing in a flame, and then identifying an unknown metal ions by using flame test. Electromagnetic radiation is energy that travels a wave, including microwave infrared radiation radio waves x-ray, radio waves,x-ray,gamma radiation, cosmic rays and visible light .there are two types of wavelength short wavelength such as x-ray, radiation and cosmic rays and long wavelength such as infrared radiation, microwaves and radio waves. long wavelength have low frequencies and low energy while short wavelength have high frequency and high energy. visible lights: a small portion near the center of electromagnetic spectrum wavelengths in range

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In the lab “All That Glitters” the objective that was focused on during the lab was calculating the density, volume and mass of various substances. The method that was used in finding the volume of the samples is called the displacement method. This is a process where the volume of the water in the graduated cylinder is calculated before and after the sample is placed. In this lab, the goal of the experiment was to identify and come to consensus about what the unknown substance might be. For this experiment, the required materials were ten pre and post pennies, unknown sample, graduated cylinder, weigh boat, water, paper towels and a weighing scale.

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The items that were massed were the evaporating dish, watch glass, and NaCO3. The materials were massed once before and once after being heated in the drying oven. The mass of the evaporating Dish before was 46.57 g; while after being heating was 60.15 g. The mass of the watch glass before was 57.97 g and after was 48.75g. There were two masses taken for the substance NaHCO3- one with the evaporating dish and one without, subtracted out after the lab was concluded. The mass of the substance with the dish was 48.79 g before and 62.33 g after; meanwhile, the mass of the substance without the dish was 2.22 g before and 2.18 g after. The mass of the NaHCO3 had changed after the reaction occurred along with after it was placed on the hot plate and being in the drying oven.

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Often this experiment is misinterpreted. An experiment done in elementary school boggles many. When the candle is put under the vase, the air heats up and expands. Bubbles form under glass and the air escapes. When the flame goes out because there isn’t oxygen for it to burn, the air located under the glass (carbon dioxide) cools and contracts.

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It takes a few minutes for this combustion reaction to stabilize when you first light a candle. Once the process is stabilized, the flame will burn with ease in a dewdrop shape, giving off water vapor and carbon dioxide.3 History of Candles Candles have been used for light and to brighten humanity 's celebrations for more than 5,000 years, but there is limited information about their descent. The Egyptians were using wicked candles in 3,000 B.C., but the Romans are usually credited with developing the wicked candle. Candles also

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However, we can say that it is the same wax as before. Even though sensory properties of the piece of wax changed, an object is still an object after undergoing external change. We see this change in nature as well, like a caterpillar

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When the candle was lit, the vapours would be deadly. None of the poisons lost their potency especially in airtight chambers of the tomb where they can’t even

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Different brands contain varied amounts of chemicals and dyes in the candle wax, which could have impact on the result. The experiment should be repeated with another brand to support the

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