Ben Fredeen CTD Chemistry Blog

Solubility Inquiry Lab Introduction: The purpose of this lab was to identify the name of an unknown solid by dissolving it in different temperatures of water or dissolving different amounts of the solid. While doing this, we used a solubility curve graph of the three possible solutes which allowed us to determine what specific temperatures or amount of solute to test. Some important terms for this lab include solubility curve, solute, solvent, and saturated/unsaturated solution. A solubility curve is the graph of the maximum amount of a solute that can be dissolved, in 100 grams of water, at different temperatures. A solute is the substance that is being dissolved in the solvent. A solvent is the substance which is dissolving a solute. An example of a solute and solvent would be dissolving sugar in water where the sugar would be the solute and the water would be the solvent. A saturated solution is when there is the maximum amount of solute dissolved in water. A solution is

Alka Seltzer and the Ideal Gas Law Lab Introduction: The purpose of this lab was to determine the mass of carbon dioxide released when a sample of alka seltzer is placed in water. This was done by collecting the gas in a balloon and measuring its dimensions after the reaction. This would allow us to get an estimate of about how much volume of gas was in the balloon and determine the amount of CO2 given off. We could determine the volume not only by measuring the size of the balloon but also filling the balloon to the same size with water and measuring the amount of water in a graduated cylinder.            (Balloon before alka seltzer put in water )          (Balloon after alka seltzer put in water) Data: Calculations: Analysis Questions: 1.    Discuss an area in this lab where expe r imental error may have occurred. One of the main spots we could have had an experiment al error was when we attempted to fill the balloon with water to the same size i