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The formula of the anhydrous compound was determined to be CuSO 4. Calculate the formula of the hydrated compound. Solution: 1) Assume 100. g of the hydrate is present. That means this: CuSO 4---> 74.7 g H 2 O ---> 25.3 g. 2) Change to moles: CuSO 4---> 74.7 g / 159.607 g/mol = 0.468 mol H 2 O ---> 25.3 g / 18.0 g/mol = 1.406 mol. 3) Divide by ...
- Calculate Empirical Formula When Given Percent Composition Data
4) Write the empirical formula: SO 2. 5) Compute the...
- Calculate Empirical Formula When Given Percent Composition Data
Formula of a Hydrate (\(\text{Anhydrous Solid}\ce{*}x\ce{H2O}\)) The formula of a hydrate can be determined by dehydrating a known mass of the hydrate, then comparing the masses of the original hydrate and the resulting anhydrous solid.
7 Ιουν 2024 · A compound which doesn’t contain water of crystallisation is called an anhydrous compound. E.g. anhydrous copper (II) sulfate is CuSO 4. A compound can be hydrated to different degrees. E.g. cobalt (II) chloride can be hydrated by six or two water molecules. CoCl 2 ∙ 6H 2 O or CoCl 2 ∙ 2H 2 O.
Design an experiment to accurately determine the empirical formula of a given hydrate. Predict how experimental factors will impact the accuracy and precision of results. Calculate the molar ratio of water to anhydrous solid to determine the hydrate's formula.
(a) What was the mass of the anhydrous salt? (b) How many moles of anhydrous salt is this? (c) What was the mass of the water driven off? (d) How many moles of water is this? (e) Determine the mole ratio of water : anhydrous form. (f) What is the fomula of this hydrate? Not sure what a crucible looks like? Here is a photo. It's held by a clay ...
After heating, the mass of the anhydrous compound is found to be 3.22 g. Determine the formula of the hydrate and then write out the name of the hydrate. Example #3: When you react 3.9267 grams of Na 2 CO 3 · nH 2 O with excess HCl(aq), 0.6039 grams of a gas is given off.
We can use difference in the mass between the hydrated and anhydrous compound to calculate the mass of water of crystallisation removed by heating.
