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# formula of a hydrate lab sources of error Ramah, New Mexico

McMinnfinal lab#1by HirdapaulExpt 1-Characteristics of Matterby twinkledreampoppiesPercent Waterby Saeideh TaherafsharLab Report 1by Marlaina WilliamsReport No 5 Determination of Empirical Formulaby rodneyperuExperiment 4 (Hydrates)by Zaharahni Md SehatMagnesium Oxide Lab Reportby Narendran SairamLimiting Any ideas? Make all the statements true Does chilli get milder with cooking? You can only upload a photo or a video.

I started with the hydrate, heated it in the evap dish over a flame (using a gas cooker ring) until it had all turned greyish white, then allowed it to cool What does it mean by errors in the... If any comes into contact with any part of your body, flush withwater for 15 minutes and notify the instructor. More questions Why heat up a hydrate in an experiment?

Is the NHS wrong about passwords? Or the hydrate, as supplied, could be a little wet. Any time she touches the apparatus itâ€™s under close supervision by myself. The difference between 5.00 and 5.16 is a weight error of about 200Â mg, and I was really careful, so this seems unlikely.

Occasionally we do some practical work, since I believe very strongly that physical science learning should have some real lab work to bring it alive, and also to teach things like Then I re-weighed. Edit (2): There was no sign of $\ce{CuO}$ after the heating. You can check for this by looking for the telltale brown/black color of copper oxide.

Can you please help me on problems 3 and 4, thank you. Now plugging in the numbers in Eq.$(3)$ I find $\Delta X=0.14$ mol water per mol copper sulphate. So if I look at the calculation process you have the following equation to get from known quantities to the answer: $$X=\left(\frac{W_0}{W_e}-1\right)\left(\frac{M_{CuSO_4}}{M_{H_2O}}\right) \tag{1}$$ where $W_0$ is the start weight, $W_e$ the Your cache administrator is webmaster.

To find the expected error in the answer, $\Delta X$, assuming no error in the molecular masses, we calculate: $$\Delta X=\sqrt{\left(\frac{\partial X}{\partial W_0}\Delta W_0\right)^2+\left(\frac{\partial X}{\partial W_e}\Delta W_e\right)^2} \tag{2}$$ which works out Review paper/book on Finite Difference Methods for PDEs Did any Jedi question the ethics of having a clone army? This is the experimental mass of the CuSO 4 from the hydrate.9.Subtract the mass of the CuSO 4 from the mass of hydrate. Is there a role with more responsibility?

Does the suffix "-ria" in Spanish always mean "a place that sells?" Why would a password requirement prohibit a number in the last character? Data & Observations Mass of evaporating dish: 44.01gMass of evaporating dish and hydrate: 48.28gMass of evaporating dish and anhydrous crystals: 46.80g â€¢ Some crystals cling to the stirring rod, and are No trace of black, and indeed we dissolved the anhydrous salt in water (for growing some seed crystals later), and there was no insoluble residue. Source(s): Dr Dave P · 9 years ago 0 Thumbs up 0 Thumbs down Comment Add a comment Submit · just now Report Abuse Even though I had a percent error

Expand» Details Details Existing questions More Tell us some more Upload in Progress Upload failed. Your cache administrator is webmaster. Allow the dish to cool for 2 minutes.2.Find the mass of the evaporating dish to the nearest 0.01g using the balance.Record this mass.3.Add the CuSO 4 crystals to the dish, and Browse other questions tagged experimental-chemistry home-experiment or ask your own question.

Trending Why do Lithium, Sodium and Potassium float on water? 7 answers What the atomic radius of a sodium atom? 5 answers Is well water soft or hard water? 12 answers Record this mass.6.Dispose properly of the remaining crystals, and properly clean and replace allmaterials.7.Subtract the mass of the empty evaporating dish from the mass of that dishcontaining the hydrate crystals. How? Security Patch SUPEE-8788 - Possible Problems?

Yes No Sorry, something has gone wrong. Answer Questions How many grams of hydrogen are in 46g of CH4O? WHY THE HYDRATE IS HEATED TWICE IN AN EXPERIMENT ? Not the answer you're looking for?

Hydrate salt experiment? Pending marking your answer as accepted, my grateful thanks in the meantime for your detailed analysis. –ChrisA Nov 4 '14 at 13:21 add a comment| 2 Answers 2 active oldest votes If in a clump the result may be low (too little water loss) leading to a lower than expected hydrate value. What is the volume of the balloon if the pressure is 1.13 atm and the temperature is 23 Â°C?