Aim:
To determine if the number of candles lit and how much the water rises underneath beaker is related.
Variables:
Independent - the amount of lit candles placed under the beaker at one time
Dependent - how much the water rises under the beaker
Controlled – the original height of the water.
Hypothesis:
If I increase the amount of lit candles that have been placed underneath the beaker it also increase how much the water rises under the beaker
Materials:
• 6-8 birthday candles
• Matches
• Blue tac
• Rubber bands x2
• 30cm ruler
• Shallow dish
• 250ml beaker or tall narrow glass
• Water
Method:
1. Make a small mound of blue tac the middle of the dish
2. Fill dish with water
3. Place a candle in to the blue tac
4. Place beaker in the
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But as it was tested a second time with the candles separated further apart it still only raised 25mm so it was then suspected that it was the 250ml glass beakers fault and it was a statistical error.
Does you graph suggest a relationship between the number of candles and the rise in water level?
My graph suggests that there is a relationship between the number of candles and the rise in water level. Although it did plateau when it hit 25mm but it is believed it was an error.
Predict what would happen if you changed one of the following while the number of candles stay the same.
Volume/depth of water
The volume of water will have effect on this experiment as it will change the height of the original water level. While also having more water that can be vacuumed up into the beaker as the gases are released causing a more of a water rise.
Height of beaker or glass cup
The water will rise more with a larger glass or beaker because there is more oxygen and it will create a larger vacuum resulting in a larger rise of water
Furthermore, using a graduated cylinder with markings below the 100 mL line would have allowed for more accurate measurements of the initial volume of air in the graduated cylinder.
3. Add on of the following volumes of distilled water to the test tube, as assigned by your teacher: 10.0mL, 15.0mL, 20.0mL, 25.0mL, 30.0mL. (If you use a graduated cylinder, remember to read the volume from the bottom of the water meniscus. You can make more a more accurate volume measurement using either a pipette or a burette.)
The data graphed include six or seven locations from each of the three Portland Schools. The School district tested nearly 00 buildings. Is there enough data here to make any conclusions about the water in Portland schools? What about for schools A, B and C?
the beaker was placed over the hot plate that was set at 350 degrees Celsius. When the
In this experiment, there were several objectives. First, this lab was designed to determine the difference, if any, between the densities of Coke and Diet Coke. It was designed to evaluate the accuracy and precision of several lab equipment measurements. This lab was also designed to be an introduction to the LabQuest Data and the Logger Pro data analysis database. Random, systematic, and gross errors are errors made during experiments that can have significant effects to the results. Random errors do not really have a specific cause, but still causes a few of the measurements to either be a little high or a little low. Systematic errors occur when there are limitations or mistakes on lab equipment or lab procedures. These kinds of errors cause measurements to be either be always high or always low. The last kind of error is gross errors. Gross errors occur when machines or equipment fail completely. However, gross errors usually occur due to a personal mistake. For this experiment, the number of significant figures is very important and depends on the equipment being used. When using the volumetric pipette and burette, the measurements are rounded to the hundredth place while in a graduated cylinder, it is rounded to the tenth place.
Check if there are any leaks especially around the stopcock, the valve at the bottom of the buret. When it comes to calibration, it is calibrated by transferring water into an Erlenmeyer flask and weighing it using an analytical balance. This is done for two (2) trials, each with varying amounts of water. Erlenmeyer’s mass is pre-recorded before transferring water from the buret. The volume delivered by the buret is considered the apparent, which means evident, volume. Before starting another set, the flask should be clean and dry to avoid any error. The water inside the flask will add the volume to be transferred thus making the mass of water higher than what it should really be. The mass of water obtained thru weighing by difference would then be multiplied to the buoyancy of water at the recorded temperature which will then be the corrected mass of the water. The corrected mass of the water is then divided by the density of the water, at the same temperature, and will be considered as the true mass. Correction value can be obtained by solving for the difference between the true volume and the apparent volume. Some of the correction value computed are negative and it only means that there is an error that occurred. One of the possible errors in most volumetric glassware’s is reading the wrong volume. Volume must be read based on the lower meniscus at eye
Background: The density of water is 1 g/mL. In order to find density, you must do mass divided by volume. You find solid volume by multiplying the length by width by height or by using displacement. You find mass by weighing the substance. In previous experiments, it is seen that alcohol dissolves faster than water.
Variables --------- During the experiments, the water will be heated using different spirit burners containing different alcohols. I will be able to change different parts of the experiment. These are the. Volume of water heated:
The experiment proved to satisfy Boyle’s law and this can be deduced from the relationship shown on Figure 3.3 which shows a direct proportionality to the inverse of height which is also an inverse proportionality to height.
In this experiment, a lit candle was placed in jars to prove if more oxygen in the present environment would affect the duration of the flame. During the experiment, a burning candle was put in three differnent sized jars labled, ‘A’, ‘B’, and ‘C’ from smallest to largest in their order. The flame was then measured to determine how long it lasted in the individual jars. If more oxygen is present in the environment, then a fire will last longer. The hypothesis that a lit candle will last longer with more oxygen is supported by the acquired data because the flame had lasted significantly longer (a differnece of of approximately 26 seconds) in Jar C than Jar B. This is also similar when comparing the duration of the flame in Jar B and Jar
This is very important as changing the volume can have a negative effect on your experiment and report. Make sure that you use 10cm3 of hydrochloric acid throughout all the 5 trials, You can measure the volume with help of a measuring cylinder or you can also use a pipette to measure it accurately
There are more than 400 commercial, religious and institutional manufacturers of candles in the United States, in addition to scores of small craft producers for local, non-commercial use.
water in the solution is too high. But if there is no change in weight
If I was to carry out this experiment again I would make sure the lamp
, and the volume of H2 is measured. As HCl is in excess, all the