Viscosity Lab Essay

On the other hand, the enlargement of gummy bear A submerged in water was due to the diffusion process, in particular, sugar molecules through diffusion process and water molecules through osmosis process. Gummy bear A has a semi-permeable membrane covered the surface where small particles such as water molecules were allowed to pass through it. Since the gummy bear has a low concentration of water molecules and a high concentration of sugar molecules when it was dry, therefore the diffusion process started once it was placed inside the water. The water molecules moved from higher concentration (water in the cup) through the semi-permeable membrane to lower concentration (gummy bear A); while sugar molecules moved from higher concentration (gummy bear A) to lower concentration (water in the cup). In other words, as water molecules entered the gummy bear, the dimension of the bear will increase. At the same time, as sugar molecules exit the bear and enter the water, the size of the gummy bear will decrease. The size of gummy bear A increased must be due to the water molecules entering is much faster than the sugar molecules exiting. Furthermore, since the membrane of the gummy bear was elastic, the size of the gummy bear will continue to increase and eventually disintegrated. The diffusion process continued until equilibrium of molecules were

E. What would happen if you dropped the object into the beaker while using the Archimedes’ Principle method instead of submerging the object?

The purpose of this experiment was to see if a penny could hold more drops of salt water or tap water. It was found that a penny could hold an average of 22.3 drops of tap water and only 20.8 drops of salt water. These results are consistent with the hypothesis: If the salt concentration of water impacts the amount of water a penny holds, then the penny will hold less drops with salt water. While dropping the water onto the penny, it was observed that the water formed into a dome-like shape on the penny. It looked like the individual drops of water turned into one large drop of water. This was observed for both the tap and salt water. This happened due to the cohesion and surface tension of water. Cohesion simply means that water molecules are attracted to each other and want to cling together. Surface tension is the special term that is applied to the cohesion of water molecules.

Most of the results of the experiment show that as the molarity of sucrose in the solution increases, the percent change in mass of the potato decreases. This is due to osmosis, water moves from a higher water concentration area to a lower water concentration area. From the results table, one can see that the mass of potato in the 0.1M sucrose solution increased by 13%, and the mass decreased by 28% in the 1.0M sucrose solution.

The Diffusion and Osmosis Lab determines the molarities of various sucrose solutions based on change in mass. Using table sugar in different amount of molar concentration 0.0M, 0.2M, 0.4M, 0.6M, 0.8M and 1.0M. The molarity of the solution of the sucrose solution in the dialysis tubing determines the amount of water that either move into the bag or out the bag, which also means its mass changed.

Snow globes are made of clear glass, a transparent sphere with a scenic view and a plastic toy inside the globe. The globe must be shaken to actuate the snow so the white particles can fall gradually to reach the base. When the marble (object used for this experiment) falls, it experiences two external forces which are; the gravitational force and the aerodynamic (fluid resistance) drag of the marble, which affects the rate of the marble. As the marble is falling, the speed is increased due to the gravitational force, which is pulling the marble downwards to the base of the beaker until it reaches the terminal velocity, where both external forces are equal. However, there are factors that can affect the marble’s terminal velocity, such as

The following hypothesis was made in regard to effect of the concentration gradient on the rate of diffusion: The higher the concentration gradient, the faster the rate of diffusion.

Using 3 different substances, water, soap water, and vegetable oil, using a dropper and dropping amounts of each liquid onto a penny, which one will have the most drops and which will spill over first?

By definition, osmosis is the diffusion of water across a selectively permeable membrane in response to gradients of concentration, pressure, or temperature (G. Audesirk, T. Audesirk, B. Byers). Diffusion is the passive movement of molecules or particles along a concentration gradient, or from regions of higher to regions of lower concentration (Diffusion). In the experiment, osmosis and diffusion occurred where the results indicated a change in mass when the egg was placed in different concentrations of corn syrup solution. My hypothesis stated that if the concentration of the solute is lower than the solvent, then the egg will shrink in size. With a majority of the results decreasing in weight, my hypothesis was proven to be correct.

10. I then repeated steps 1-9 using alcohol as my solvent, instead of the 1% salt solution.

The reason for the experiment is to see which liquid makes the Jelly Marble grow the most. Jelly Marbles are clear spheres made from an superabsorbent polymer and about 99% water. This makes it so that it absorbs water very quickly. If the jelly marbles are soaked in 70% rubbing alcohol then the growth will decrease.

More specifically for the experiment we will need four deshelled eggs, four beakers and distilled water with a certain percentage of sucrose, a timer, and a scale to weigh the eggs. Using the process of osmosis, we will determine the weight of the eggs after being soaked in the solution. The four beakers each had distilled water in them with sucrose but all contained different amounts. One beaker contained 0% sucrose. The other beakers contained 10%, 40%, and an “unknown” amount of sucrose. Before placing the eggs into the solution, we are to weigh each egg separately to the nearest 0.1g and record this in table. Once that step has been completed, we then place one egg in each of the beakers separately that was marked with the amounts of sucrose. At fifteen-minute intervals, remove the deshelled egg from the water inside the beaker and wipe off all the excess water. After that process has been completed, we will weigh each egg separately to see if they have gained or lost their mass/weight. Once each egg has been weighed accurately, the recorded data is placed in the table provided. This step goes on for an hour. The deshelled eggs in this experiment will increase in mass in the different types of distilled water. This lab session provided the class with the evidence that diffusion and osmosis occurs within the different types of solutions.

The only thing that will dissolve in oil is oil and corn syrup.Corn syrup and oil have the same density.

Explore how this works in this science activity. Background If you put an egg in a cup of tap water, it will sink to the bottom. Why is this? Because the density of the egg is higher than the density of tap water, so it sinks.

Diffusion is the spontaneous movement of particles from where they are more concentrated to where they are less concentrated. For this experiment, a 14 cm glass was filled with cold tap water. A drop of red food coloring was dropped in the cup. A stopwatch was used to measure the time it took for the food coloring to get to the bottom of the cup. The average diffusion rate was .78 cm a second. If a different color was used, I do not think it would have made a difference in the results. The mood of the person experimenting could possibly alter the results. For example, if a person is under stress, they may accidentally squeeze too much altering the rate of diffusion. If the water was warmer, this may have sped the