A 2104 g hydrate of epsom salt, mgso4 nh2o was heated up, the water was released, and the final anhydrate mass was 1204 g what is the formula of this hydrate what is the formula of this hydrate determine the mass of the water that has left the compound. Iron (iii) phosphate (hydrated sample) was heated to a constant mass determine the formula of the hydrated salt from this information 1245 g crucible mass 1621g crucible + hydrated salt mass 1522g crucible + anhydrous salt mass thanks so much i don't know what to do :x. Laboratory analysis of a hydrated salt determine the formula of one of the hydrates below your teacher will tell you which one to do hand in your work before leaving class.
When determining theformula of a hydrate you must not assume that it is one with a simple formula hydrates can normally be decomposed into the anhydrous salt and water by gentle heating from the data collected the number of molecules of hydrated water will be determined per molecule of anhydrous salt. A) confirm the formula of a hydrate with known formula b) second, find the formula of a hydrate in which the salt formula is known but not the molar amount of water. A hydrate is an ionic compound that contains water molecules in its structure to determine to determine the formula of a hydrate experimentally, we must calculate the mole: mole ratio of the water portion. Determining the formula of a hydrate a hydrate is an ionic compound that has a definite amount of water molecules attached to its crystalline structure.
Lab - formula of a hydrate - help with calculations magnesium sulfate ( mgso 4) is a molecule that loves to hold on to water (hydrophilic)in this lab we actually calculate the formula of the formula for the hydrate. A salt that becomes hydrated is called an ionic hydrate the forces holding the water molecules and crystal lattice together can either be hydrogen bonds, coordinate covalent bonds, or ion-dipole forces. In this experiment, the water of crystallisation is removed from hydrated copper(ii) sulfate the mass of water is found by weighing before and after heating this information is used to find x in the formula: cuso 4xh 2 o this is a class experiment suitable for students who already have a. Calculate the formula of the hydrated salt that was formed the molecular weight of the anhydrous salt (mgso4) is 120371 g/mol please explain your answer so i can understand how this is done.
To calculate the percent of water you will divide the change in mass of your sample (mass of water removed) by the mass of the hydrated salt (original mass) if you are given the formula you would do analysis of the information provided. Divide this difference by the mass of the hydrated salt continuing the example, we would divide 9 grams by 25 grams to get 36 percent this is the percentage of water in the hydrate, so it's the first thing you might need to calculate however, we can calculate some other information as well. You will be weighing a hydrate and heating it to remove the water (now called anhydrous salt) and weigh it again you can now find the percent of the anhydrous salt and the water by finding a mol ratio, you can find out how many moles of water there are per mol of anhydrous salt. Given the mass of a sample of the hydrate (with water bound in the crystal) and the mass of anhydrous salt (without water bound in the crystal) of known formula obtained on heating, it is easy to find the formula of the hydrate. A hydrate is a chemical that has water molecules loosely bonded to it the water molecules are not actually part of the formula, so the formula is written slightly differently.
Calculate the number of moles of hydrate used anhydrous salt produced and water lost by the reaction set up an empirical formula for the hydrate by putting the whole number mole ratio of water to anhydrous salt in place of the x in the formula cuso 4 •xh 2 o. Shows how to determine the number of moles of water in a hydrates compound you can see a listing of all my videos at my website, . Determination of the formula of a hydrate - a greener approach objectives • to experimentally determine the formula of a hydrate salt • to learn to think in terms of moles. How to calculate the formula of a hydrated salt how to calculate the formula of a hydrated salt determining the molecular formula of a hydrated copper sulfate - duration: 5:52. Example #2: a hydrate of na 2 co 3 has a mass of 431 g before heating after heating, the mass of the anhydrous compound is found to be 322 g determine the formula of the hydrate and then write out the name of the hydrate.
A chemical formula is a way of expressing information about the proportions of atoms that constitute a particular chemical compound, using a single line of chemical element symbols and numbers. Determining the formula of hydrated salt objective 1 use the analytical balance to weigh a given hydrated salt as accurate as possible in order to determine the weight of water in the salt introduction balances are important laboratory equipment as they are used to determine the mass of materials. Here's an example of how to do this: let's assume you want to determine the formula for the hydrate of barium chloride you take a sample of the hydrate, weigh it, and find it has a mass of 413 g you then heat the sample in order to remove the water and find the weight of the anhydrate to be 352 g.
In order to determine this, we weighed the mass of copper (ii) sulfate, boiled it for about 10 minutes until it became an anhydrous salt, then found the weight of its anhydrous salt and the water, by subtracting the weight before heating from the result, in the hydrate. Problem #5a: a solution was made by dissolving 520 g of hydrated sodium carbonate in water and making it up to 500 dm 3 of solution the concentration of the solution was determined to be 00366 m determine the formula of hydrated sodium carbonate. This lower calculated mass of water translated into a lower percent by mass of water and therefore a different ratio of water to anhydrous salt in the determination of the formula of the hydrate than the accecpted cuso4+5h2o. From the masses of vaporized water and of the anhydrous ionic salt, determine the formula of the hydrate procedure (details) each student will work individually thoroughly wipe a crucible and cover with a clean cloth towel to remove dirt and other particulate matter.
Chem 109 introduction to chemistry revision 12 laboratory exercise: the chemical formula of a hydrate in this laboratory exercise we will determine the relative amount of water in a hydrated.