The concentration of a Repeat step 5 to verify the mass is correct. Determine the formula and name for the hydrate: Everything went as planned and I am fairly confident my formula is correct. Record the mass 4.
Go to hydrate problems 1 - 10 Problem 1: Overall, I think the experiment went smoothly. Care was taken to isolate all the lithium perchlorate as its hydrate.
What is the value of y? A solution was made by dissolving Explain why the mass of the sample decreased after it was heated, despite the law of conservation of mass. The mass of the anhydrous compound that remained was 2. After heating, how many grams of the anhydrous compound remained? Why do you need to use a cover for the crucible?
An interesting variation on this lab is to have students calculate the degree of decomposition of sodium carbonate decahydrate in an old sample of the salt. The forces holding the water molecules and crystal lattice together can either be hydrogen bonds, coordinate covalent bonds, or ion-dipole forces.
What is the formula of the hydrate?
B Mass of empty crucible: The silver chloride was filtered, dried, and weighed, and it had a mass of 0. Cool and record mass. Go to Determine the formula of a hydrate: Why do you need to heat the crucible before using it in this lab?
The water molecules that combine with the salt can result from exposure to humid conditions.Gain skills in drying to constant mass 56 EXPERIMENT 4: COMPOSITION OF A HYDRATE In this experiment a weighed sample of an unknown hydrate will be heated and the mass of water lost on heating will be determined.
The. Determining the Formula of a Hydrate. The mass of water lost during heating can be determined and the coefficient. x. can be The total mass remains constant. Mass of substances before reaction = Mass of substances after reaction In this experiment.
heating to constant mass Heating to constant mass ensures that all of the water of hydration has been driven off and we are massing only the anhydrous salt.
After the dish has colled and been weighed, get a beral dropper and a small amount of water. The water in a g sample of the hydrate was driven off by heating.
The remaining sample had a mass of g. Find the number of waters of hydration (x) in the hydrate. Percent Composition of Hydrates Essay Sample. Purpose: Demonstrate proficiency in using the balance and Bunsen burner.
Determine that all the water has been driven from a hydrate by heating your sample to a constant mass. Percent Composition of a Hydrate. that all the water has been driven from a hydrate by heating your sample to a constant mass. Relate. results to the law of conservation of mass and the law of multiple proportions.
Perform. calculations by using the molar mass.Download