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
This is because there are more water molecules in a given volume to react with the Alka-Seltzer tablets. However if there are sufficient water molecules to occupy the Alka-Seltzer tablets an increase in the water molecules will not alter the rate of the reaction. This is because the Alka-Seltzer tablets are already working as fast as they can to react with the water. The concentration can be increased by increasing the volume of the water used in the reaction to dissolve the Alka-Seltzer tablets in. To control the... ...
Also we might have been shaking the test tubes at different speed which may have caused a greater number of bubbles to be released. Overall I felt that the experiment was accurate and reliable and there was not much that could have been changed on it.
1. Put 400 mL of tap water into a beaker. Heat it on a hot plate until it starts to boil.
Possible sources of error in this experiment include the inaccuracy of measurements, as correct measurements are vital for the experiment.
As the light is increased so would the rate of photosynthesis. Apparatus: boiling tube, 250ml beaker, bench lamp, ruler, sodium
The data from the first experiment demonstrated that when the temperature is held at a constant and the pressure increases, then the volume will decrease. The data collected from the experiment are shown in figure1.
There will be 50 millilitres of water in the glass tube. I will allow the carbon dioxide to travel
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?
Remove the metal object from the first beaker and insert it into the second one.
Any remaining carbon is to be cleaned off the beaker so that the flame can easily heat the water. Exactly 100ml of water is to be used. The length of the wick on the spirit burner must be the same. The height of the burner from the beaker (the brick height) must be the same. The beaker must stay the same shape as well because if it is not the flame may have more surface area where to heat the water.
Concentration of H2O2- The higher the concentration the more collisions with the active site. This means there is an increased rate of reaction. Creating more froth so the concentration will have to be the same for each of the test tubes.
Things that could have impacted the experiment is the lid getting hotter as getting closer to the end of the experiment. Also, measuring from the end of the ruler definitely would have impacted it because you wouldn’t have an accurate measurement if you didn’t start at zero. Some questions that could be tested further is will the bigger candles make a difference or will the
Repeat step 4 after another minute continue this for 5 minutes Beaker Start 1 2 3 4 5 Temperature change 1 59°c 57°c 56°c 55°c 52°c 50°c -9°c 2 72°c 71°c 66 °c 63°c 60°c 57°c -15°c 3 86°c 71°c 64°c 58°c 56°c 52°c -34° c 4 72°c 68°c 65°c 60°c 57°c 53°c -19°c Main Investigation ------------------ Aim To find out weather a beaker with a larger surface area cools quicker than one with a smaller surface area. Fair test To make it a fair test we will keep the following the same: Colour of tin - we will use clear beakers Amount of water - we will use 100ml
- Each teaspoon may not have been equal. Measurements were made based on judgment and not exact measurements.
Aim: To determine the effect of temperature change on the height of water in capillary action at 8 seconds.