The molar mass of a solid carboxylic acid is determined by titrating a known mass of the acid with a standardized solution of naoh to a phenolphthalein endpoint. which errors will lead to a molar mass that is smaller than the actual molar mass? i. some of the acid is spilled when being transferred into the titration flask. ii. the endpoint is recorded when the solution is dark red in color rather than light pink.
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Chemistry, 22.06.2019 03:30
The boiling point of liquids is very high what does it indicate
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Chemistry, 22.06.2019 03:40
Astudent is given a sample of a blue copper sulfate hydrate. he weighs the sample in a dry covered porcelain crucible and got a mass of 23.875 g for the crucible, lid, and sample. the mass of the empty crucible and lid was found earlier to be 22.652 g. he then heats the crucible to expel the water of hydration, keeping the crucible at red heat for 10 minutes with the lid slightly ajar. on colling, he finds the mass of crucible, lid, and contents to be 23.403 g. the sample was changed in the process to very light clue anhydrous cuso4. if there are again 100.0 g of hydrate, how many grams of cuso4 are in it? how many moles of cuso4? (hint: molar mass of cuso4 = 159.6 g / mole. what per cent of the hydrate is cuso4? you may convert the mass of cuso4 to moles.)
Answers: 3
The molar mass of a solid carboxylic acid is determined by titrating a known mass of the acid with a...
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