# Tag Info

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When a sample of $\ce{CuSO4⋅5H2O}$ is dissolved in water, the $5$ molecules water are mixed with the water used as solvant, and cannot be distinguished any more from the other molecules of water. It does not really matter, as if you want to calculate the molarity, you never dissolve your sample of $\ce{CuSO4·5H2O}$ in exactly $1$ litre water. No ! You ...

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Compiling my comments(now deleted) into an answer. TL;DR: the products are different due to different stoichiometric ratios of the reactants and is not dependent on the solvent. You can use different solvents so that you can increase the yields. Hunsdiecker reaction The Hunsdiecker reaction is a reaction whereby silver salts of carboxylic acids react with a ...

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Since the temperature of the solid is now slightly lower than the temperature of the surrounding water, heat will be transferred from the water to the solid until the temperatures are equal It is fine to think that way as a rough draft in rationalizing this process. The only issue is that temperature is a macroscopic quantity, and mechanism tends to be a ...

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Why do reusable heat packs have a limited time frame before the reaction becomes irreversible? This reaction should never become irreversible until and unless there is bacterial growth or loss of water for some reasons. For example, one manufacturer explains that the pads can re-used for 18 years! http://www.thermo-pad.com/frequently-asked-questions/ We ...

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The sodium acetate that shows this behavior is not anhydrous $\ce{NaCH3COO}$ as you write. It is the hydrated salt $\ce{NaCH3COO·3H2O}$. The anhydrous salt does not show the phenomena of surfusion. Only the hydrated form does it. If you keep the solid form of the hydrated salt a long time, I think it will slowly loose water by evaporation through the plastic ...

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Hans' idea (evaporation + filtration) is not easy to carry out in practice. Concentrated $\ce{NaOH}$ solutions are extremely viscous, and if they are mixed with $\ce{NaC}$l crystals, they cannot be filtered easily. Look ! If the filtration is done on paper, the paper is quickly transformed into a sort of parchment, that prevents any liquid from going through....

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