1. To determine the mole ratio of barium chloride to water in a hydrated barium chloride that BaCl2: H2O. Measure the mass before heating. Use heat For hydrate, and To find the mass of water measured after heating, and subtract the two masses to get mass of water. To convert mass into moles by using mass of water divided on molar mass of water.
2. To determine the percentage of a hydrate mixture of hydrated barium chloride and sand. Use Heat it to get the anhydrate mass of the lose water. Convert the mass into moles using the hydration number and get the Percentage = mass of hydrate divided on mass of total mixture multiply in 100.
This experiment was completed successfully. All required masses were found, and the process was followed precisely. The unknown hydrate was identified as Barium Chloride Dihydrate, BaCl2 • 2H2O.
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The aims are good, but you have to be more specific. For example, measuring the masses was not an aim, but the means to reach the objective of determining the hydrate composition. Then, it would look something like this:
'This work had mainly two objectives:
1. To determine the mole ratio of barium chloride to water in a hydrated barium chloride, BaCl2: H2O. In order to do that, the mass of the material was measured before and after heating, and the molar masses of BaCl2 and H2O were used to calculate the molar ratio.
2. To determine the percentage of a mixture of hydrated barium chloride and sand. By knowing the BaCl2:H2O ratio previously determined, the mass loss produced by heating can indicate the amount of BaCl2 present in the mixture. Since there are only two components in the mixture, by knowing the mass of one and of the total mixture, the percentage of each in the mixture can be determined.'
Regarding the conclusion, you must connect it more to the aims. Did you manage to successfully determine both quantities that you were looking for? Did the method used work? What are the quantities (for both parts of the experiment)?
In your explanation you have the first questions, although you could rephrase them a bit, but the mixture quantities are missing. Also, it would be nice to include a small remark about how this method works. Something like:
'The method of heating up a hydrate to determine the amount of water has been successfully used to calculate the molar composition of a BaCl2 hydrate. In this method, when the hydrate is heated, the water evaporates, and by measuring the mass loss in the process, the composition of the hydrate can easily be determined. In this case, we obtained a molar ratio of xxx by using this method. Moreover, once this ratio is known, the method can be applied to calculate the composition of a mixture of the hydrate with some other material, in this case sand. The mixture measured during this experiment was found to have a mass percentage of BaCl2 of xxx.'© BrainMass Inc. brainmass.com December 24, 2021, 11:58 pm ad1c9bdddf>