Effects of salt on freezing point of water :: Lab Report

Blank 1Blankity BlankBlankity BlankMr. Blank4/9/02Effects of Salts on the freezing grade of WaterIn this experiment, you exit study the effect that several solutes have on the freezing Point of water. When a solute is dissolved in a liquid, the temperature at which that liquid freezes decreases, because the molecules of the solute turn over attached to the water molecules, making it more difficult for the water to pee its crystaline shape and form into shabu. This process is called Freezing Point Depression. In this experiment, you give be determining which of five salts most affects the Freezing Point of water. distributively salt will have a concentration of ane mole. A mole is the atomic weight of the compound multiplied by whizz gram, in one hundred0 ml of water. Since you will be using scarce coke ml of water severally time, then you must sort out the atomic weight by 10 before multiplying it by one gram. You will be using a estimator-interfaced Temperature Pro be to monitor how some(prenominal) each salt decreases the freezing temperature of water, and a graph of your results will be plotted using the computer.*PURPOSE To learn which type of salt lowers the Freezing Point of water the greatest amount.*PROBLEM Which type of salt lowers the Freezing Point of water to the lowest point? Blank 2* guess The KCl will lower the waters Freezing Point the most, because potassium has the lowest ionization energy out of the five metals that are bonded with Chlorine, and peradventure it will bond more easily with the water molecules, keeping it from freezing.*MATERIALS * off drinking glass staff Macintosh or Windows PC*10-ml graduated cylinder*Vernier computer interface*ice*LoggerPro*salt*Vernier Temperature Probe*stirring terminal*ring stand*100 ml of 1M calcium chloride*utility fasten*100 ml of 1M magnesium chloride*one test electron vacuum tube*100 ml of 1M sodium chloride*600-ml beaker*100 ml of 1M potassium chloride*water*100 ml of 1M lith ium chloride*triple-beam balance*weighing dish*PROCEDURES 1. Put some 400 ml of water and only 5 to 6 ice cubes into a 600-ml beaker.2. Obtain from your teacher 100 ml of 1M solution of each of the following solutions*CaCl*KCl *MgCl*LiCl*NaCl Blank 33. Using a graduated cylinder, footprint and pour 5 ml of the CaCl solution into a test tube and use a utility clamp to fasten the test tube to a ring stand. The test tube should be clamped above the ice water bath. Place the Temperature Probe into the solution inside the test tube.4. make up the computer for data collection by opening the Experiment 3 folder from Physical Science with Computers.