Solubility Lab

I. LIQUID - Identification of an Unknown Liquid: Using the physical properties of Solubility, Density, and Boiling Point.

Temperature is known as one of the factors that affect the solubility of a gas in its solvent. Because the enthalpy of solution for gases dissolved in waters is usually

The ability a substance has of dissolving is known as, solubility. Solute, is the substance being dissolved, while solvent is the substance in which the solute is being dissolved in. The final product of a solute and solvent mixing together is known as, a solution. Considering the fact that the research question states that the purpose of this experiment is to understand how the mass of brown sugar effects the time it takes to dissolve in 50ml of water, the solute of this experiment would be brown sugar, while the solvent would be the 50ml of water. Five different masses of brown sugar will be experimented throughout this experiment, 5g, 10g, 15g, 20g and 25g, with three trials for each mass.

11. The experiment was repeated three more times using different water temperatures (room temp water, cold temp water, hot temp water).

Substance A and B were weighed; Substance A weighed 0.502 g and substance B weighed 0.503 g. Both substances were put into two different test tube with approximately 8 ml of DI water into the test tub. Substance A and B were stirred and B dissolved while A did not. This shows that B is soluble in water compared to A. Thus, shows that B is soluble in water than A. The reason why B is soluble in water is because it has a higher dipole moment than A. With a higher dipole moment, it shows that it is soluble in water since it is polar and the bonds were easily broken.

Ionic compounds are soluble in water to a certain point depending on the compound. The level of solubility changes among different compounds. Some ionic compounds can completely dissolve in water and appear to be a homogeneous mixture. Although, some ionic compounds dissolve very little, and could be considered insoluble, since it does not dissolve fully. Depending on the compound, the level of solubility can be high or low. However, ionic compounds could dissolve to a certain degree. If the solution appears to be a heterogeneous mixture, many may assume through visual representation that it may be insoluble. As stated previously, the smallest amount of solubility should be considered. To confirm whether or not the substance is soluble, observe the efficiency when conducting electricity. Due to practical reasons, the slightest solubility could be considered insoluble by people.

In order to fulfil the labs purpose, the lab was split into two parts. The first part consisted of measuring and determining the freezing point depression of the solution water. The second part consisted of measuring and determining the freezing point depression of a solution that consisted of water and an unknown solute.

IV) Part C Results: 1) Complete the following table by rating each pair of liquids as either miscible or immiscible. (2 Points)

For our lab, we have six beakers of water. Three of the beakers contain high temperature water that range from 46 ℃ to 55 ℃, while the other three beakers contain room temperature water that range from 22 ℃ to 23 ℃. Then, we take six different colored Alka Seltzer tablets, and place them into the beakers one at a time. We record the length of time it takes for each Alka Seltzer to dissolve

The Effect of Different Temperature Water on Alka-Seltzer Dissolving Time The Effect of Different Temperature Water on Alka-Seltzer Dissolving Time Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 Average 30 °C 90.00 sec 97.74 sec 73.63 sec 101.94 sec 70.13 sec 86.72 sec 50°C 50.01 sec 80.59 sec 90.16 sec 87.15 sec 70.81 sec 75.74 sec 70°C 56.65 sec 56.57 sec 56.60 sec 56.80 sec 57.16 sec 56.76 sec 90°C 20.85 sec 27.78 sec 28.78 sec 27.35 sec 29.91 sec 26.95 sec 110°C 25.41 sec 24.03 sec 21.73 sec 22.14 sec 26.17 sec 23.90 sec Figure 1 The data table is showing the relationship between temperature of water and dissolving time of Alka-Seltzers. Alka-Seltzers were placed in 30°, 50°, 70°, 90° and 110° water.

In this experiment, we investigate the change in temperature caused by adding a chemical substance into the water and dissolving it. The results recorded in the table below show that our hypothesis is correct.

Solubility- Test 2: Materials: We used three ml of water, a test tube, rubber stopper, 10 ml graduated, test tube rack, weigh paper, triple beam balance, and a (3) gram(s) of solution. Procedure: We dissolved the first gram by rolling it in our hand for three minutes. Because it dissolved we added a gram more of the solution and got our data.

The purpose of this lab was to to learn how temperature and surface area affect how fast a solute dissolves. This lab relates to what we have recently been learning in class because we have been going into deeper discussion about solutes, solvents, and the concept of solubility. In this lab, we first had to have a trial that tests whether or not the surface area of a solute affects the speed at which it dissolves in the solvent. To do this we first had everyone put on goggles for safety purposes. Next, a group member opened the packet of Alka Seltzer, keeping one tablet as a whole and crushing the second tablet into a powder using a spoon.

The data in the lab was graphed and shown in the cooling curve. Bases off the data on the graph, the freezing points are shown where the temperature remains constant. Using the freezing points, the difference of freezing point was calculated. The molality of solution was calculated in the lab using the molar mass of the unknown solution from the given previous data. The data in the lab showed the molar mass of the unknown solute to be off from the given molar mass in the lab.

This lab experiment aims at using different techniques of dissolving and extraction to test the rates of solubility of different substances that have both similar and dissimilar substances. Each experiment was based on the idea of like substances dissolving each other, which means that polar substances can be dissolved in polar substances, and non-polar substances can be dissolved in non-polar substances [1]. To add, each experiment required that both dissimilar and similar substances are mixed in order to develop layers resulting from the immiscibility (inability of substances to mix) which will ultimately enable similar substances to be extracted. The different kinds of layers that formed were organic or aqueous; organic mainly consisted