Data Analysis Does the mass of a substance, borax, sugar, or Epsom Salt, affect how wide a crystal will grow? The hypothesis is,”If crystals are grown in borax, then the crystal will have a bigger width than the crystals made with Epsom Salt and sugar”. In this experiment, the independent variable is the mass of the substance added to water, such as borax, sugar, or Epsom Salt. The dependent variable is the width of the crystals after having seven days to form. Some control variables are using the same type of jar, the same measurements of water, and the same amount of pipe cleaner put into the jar. The control group in this experiment is the standard recipe for making each crystal. The experimental group is the crystals made with the other …show more content…
Three were sugar and water solutions with different masses of sugar, another three were borax and water solutions, with different masses of borax, and finally there were three Epsom Salt and water solutions, with different masses of Epsom Salt. The average width of crystals made with sugar, overall, is 2.52 centimeters. The average width of crystals made with borax, overall, is 0.36 centimeters. The average width of crystals made with Epsom Salt overall, is 0.61 centimeters. There was not a specific pattern that happened daily. In fact, the data did not grow every single day, some days the crystals stayed at the same measurements, and some days, according to the graph, the crystals had actually shrunk from the day or days before. Out of the ten graphs, only one graph showed a positive trend the entire week. This was the sugar crystal, and it was made with 480 milliliters of sugar and the scale showed that it weighed 410 grams. All the other crystals had one or more negative trends in their graphs. Also, there was not a specific trend for each day that happened for each crystal type, all the results were completely different, and almost at …show more content…
For instance, in this experiment adding less of a substance’s mass to water will impact the crystal’s size by not making the width of a crystal not as large. The independent variable and the dependent variable do relate to one another. As stated above, the independent variable is the mass of a substance that was added to water, and the dependent variable is width of the crystals that will grow after seven days. The two variables do relate, because adding less or extra mass of a substance to a recipe did conflict with the data that was collected in the seven days that the crystal was
In my data table it shows that the gummy bear put in water grew 0.5cm more than the other ones put in the other liquids.
Dependent variable: We are measuring the time taken for the pink indicator to turn clear when hydrochloric acid is added to it. Independent variable: We are changing the molar of hydrochloric acid we are adding to the gelatine cubes. The molars range from 1-3.
In my experiment, I will use an overall volume of 50 cm³ of 2moles of
I predict that if I double the amount of yeast then I will get double the amount of oxygen produced because I am doubling the rate of which the particles collide. I predict that if I double the amount of water in the yeast then the oxygen will have decreased by double because I am halving the amount of yeast particles the can react. Independent Variable = ==
The purpose of this experiment is to investigate the effect of changing the concentration of sodium chloride solution on the rate of osmosis in tubes of potatoes. This was maintained using equal measurements of the potato tubes and applying them into the different concentrations of sodium chloride, 0%, 2%, 5%, 10%, 20% and 26%, in beakers then measuring the change in mass of the potato tubes afterwards. The time taken for all potato tubes to be placed in solution was 15 minutes. Can the concentration gradient of the sodium chloride solution influence on the rate of osmotic diffusion undergone by the potato tubes?
Regarding the densities of Coke and Diet Coke, I believed that the density of coke would be greater than the density of Diet Coke. Because the content of Coke contains more sugar than Diet Coke, it would contain more mass and since density is mass dependent, Coke would be denser than Diet Coke. From the results of the experiment, there was a slight difference between the densities of Coke and Diet Coke. The measurements obtained from the pipette and the graduated cylinder demonstrated that Coke is denser than Diet Coke while Diet Coke was shown to be denser than Coke using the burette. With the pipette, the average density of Coke is 1.02 and the average density of Diet Coke is 0.99. With the graduated cylinder, the average density is 0.976968 and the average density of Diet Coke is 0.95. With the burette, the average density of Coke is 0.99 and the average density of Diet Coke is 1.0. Among the three instruments, the most precise was the graduated cylinder and the most accurate was the volumetric pipette. Since density is defined as mass/volume, changing the volume of Coke or Diet Coke would have changed.
Regression analysis is also used to understand which among the independent variables are related to the dependent variable, and to explore the forms of these relationships. In restricted circumstances, regression analysis can be used to infer causal relationships between the independent and dependent variables. However this can lead to illusions or false relationships, so caution is advisable;[2] for example, correlation does not imply
The input variables are the ones that I can change in order to affect the experiment and the outcome variables are the ones I will measure to see how the input variable has affected it. Input Variables --------------- Amount of calcium carbonate Amount of hydrochloric acid Surface area of calcium carbonate Concentration of hydrochloric acid Temperature of hydrochloric acid Introduction of a catalyst Outcome variables ----------------- Amount of calcium chloride released Amount of water released Amount of carbon dioxide released Change in weight
The dependent variable that will be measured is the height at which the ball bounces back. The control variables that will need to be kept constant if the results are to be as accurate as possible are. 1. What is the difference between a. and a. The weight of the ball; we will use the same ball throughout the experiment to ensure that the results are as accurate as possible.
Random errors reflect a low precision through high scatter. Increasing the sample size of the number of tablets used will produce more data that can be graphed, and from which a more reliable and representative line of best fit could be produced, ultimately minimising random errors. Additionally, increasing the number of trials for each number of reacting Alka Seltzer tablets would minimise random errors by helping to produce a more precise average change in mass. Modifying the method can also help minimise the effect of random errors, by obtaining more reliable results. For example, instead of cutting the Alka Seltzer tablets in half, whole Alka Seltzer tablets could have been used, and the amount of reacting HCl could have been increased to account for the increase in the number of tablets used for each ample. In doing this, the mass of the reacting Alka Seltzer tablets will be more consistent for each trial, and the state of subdivision of the tablets could be truly kept
Investigating the Effect of Sugar Solution on the Weight and Size of Potato Cells Aim: To investigate whether the different concentration of sugar solution will affect the weight and size of the potato cells. General background information: Osmosis is defined as the movement of water or any other solution's molecules from an area in which they are highly concentrated to a region in which they are less concentrated. This movement must take place across a partially permeable membrane such as a cell wall, which lets smaller molecules (E.g. water) through but does not allow larger solute molecules to pass through. The molecules will continue to diffuse until the area in which the molecules are found to reach a state of equilibrium, meaning that the molecules are equally distributed throughout the cell, with no area having a higher or lower concentration than any other hence equal. Hypothesis/prediction: For this particular investigation I believe that the lower the concentration of the sugar solution in the test tube the mass of the potato will be greater and the longer the potato cells will be.
The dependent variables rely on the independent variables:
Dependent Variables Amount of vitamin C in fruit juices. Controlled Variable Same amount of liquid for each fruit juice.... ... middle of paper ... ...
= == In my investigation to find out how salt solution concentration affect the mass of potatoes, I will investigate how much the mass of a potato changes if I leave it in a beaker of water with a specified salt concentration for half an hour. I will change the salt concentration after each experiment. Background Knowledge --------------------