Steps of crystallization - Chemistry Stack Exchange
网页2019年3月27日 · An excess of copper(II) oxide is added to dilute sulfuric acid to make crystals of hydrated copper(II) sulfate. The processes listed may be used to obtain crystals of hydrated copper(II) sulfate. concentrate the resulting solution; filter; heat the crystals; wash the crystals; Which processes are needed and in which order? A 1, 2, 3 and 4 B 1,2 ...
crystal structure - Why is sulfuric acid used in crystallization ...
网页2016年12月4日 · Take a cupful of water in a beaker and add a few drops of dilute sulfuric acid. Heat the water. When it starts boiling add copper sulfate powder slowly while stirring continuously. Continue adding copper sulfate powder till no more powder can be dissolved. Filter the solution. Allow it to cool. Do not disturb the solution when it is cooling.
decomposition - What are the crystals that have formed around …
网页2018年3月30日 · There are other reagents stored there including formaldehyde, HCl and acetic acid. I put some of the crystals on top of my wood-burner, which is probably at least 150', and they instantly melted and bubbled. Visible fumes were given off which may have been NO2. I also tried a lighted match and the crystals …
How to get back my beautiful crystals made from iron and …
网页2014年10月2日 · Overnight, beautiful green/blue crystals formed: I just love them. After another day, the reaction almost stopped. I suppose the acid was all bound to iron. To continue the process, I poured some concentrated sulfuric acid into the solution. That was a big mistake - the crystals reacted with concentrated acid and formed ugly white dust:
Sulfuric acid symmetry point group - Chemistry Stack Exchange
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How to clean copper(II) sulfate crystals from sulfuric acid?
网页2015年12月4日 · How would I separate the copper(II) sulfate from the sulfuric acid left over from the electrolysis process in solution? I think, one way would be to make copper(II) oxide and mix it with the solution so that I get more copper(II) sulfate out of the solution by using left over acid. Then separating copper oxide would be easy.
Why should all the acid be used up when making zinc sulphate …
网页It would be difficult to have exactly the right amounts of zinc and sulfuric acid, so one or the other will be in excess. If zinc is in excess the solution can be filter to easily remove the excess Zn. If Sulfuric acid is in excess then when all the water is gone you get zinc sulfate which is wet with sulfuric acid.
How can I know when I have added an excess of magnesium oxide?
网页2014年10月8日 · Measure $50~ \mathrm{cm^3}$ of dilute sulfuric acid into a beaker and warm the solution. Using a spatula, add some magnesium oxide and stir the mixture. Continue adding the magnesium oxide until excess is present. Separate the excess magnesium oxide from the solution of magnesium sulfate. Heat …
Why iron reacts differently with concentrated and dilute sulfuric …
网页2015年10月11日 · Concentrated sulfuric acid is at least $18~\mathrm{M}$ and contains only 2% water by mass. In this situation, most sulfuric acid molecules do not ionize due to the lack of water. The oxidizing power of concentrated $\ce{H2SO4(l)}$ does not come from $\ce{H+}$ ions or $\ce{SO4^2-}$ ions, but rather the $\ce{H2SO4}$ molecules.
Mixing hydrochloric acid and sulphuric acid, both concentrated
网页2018年3月27日 · Hydrochloric acid stock solution is already about 63% water, so I would expect fewer side effects from adding sulfuric acid to hydrochloric. $\endgroup$ – Oscar Lanzi Commented Mar 27, 2018 at 12:59