Answer the following questions using complete sentences and support your a calcu

Question

Answer the following questions using complete sentences and support your a calculations, if acceptable. nswers with desired. Attach additional pages as necessary. Handwritten or typed answers are 1. Write the molecular, total ionic and net ionic equation for the reaction of aqueous copper (1I) bromide with aqueous sodium sulfate. 2. Some of the reactions performed did not form a precipitate, but a reaction still occurred. Write one sentence per each of these reactions describing the evidence we used for the reaction. 3. Write an introduction for the Inorganic Precipitates lab. (Reference Appendix on guidelines for laboratory writing)(20 pts additional)

Explanation / Answer

From the given data

1. reaction of CuBr2 and Na2SO4

molecular : CuBr2(aq) + Na2SO4(aq) ---> CuSO4(aq) + 2NaBr(aq)

ionic : Cu2+(aq) + 2Br-(aq) + 2Na+(aq) + SO4^2-(aq) ---> Cu2+(aq) + SO4^2-(aq) + 2Na+(aq) + 2Br-(aq)

net-ionic : Cu2+(aq) + SO4^2-(aq) --> Cu2+(aq) + SO4^2-(aq)

2. Some reactions yield a soluble product upon reaction and therefore no precipitate is formed but reaction occured.

These reactions are identified by change of color occuring from the initial to the final reaction solution.

3. Inorganic precipitate lab, qualtitative and quantitative anaylsis of cations and anions can be achieved by the inroganic precipitation lab experiments. Here we start with a soluble salt and then add another known reagent to it. The combination leads to a isolable precipitate which may be colorless white or a dark colored like PbCrO4 is a yellow precipitate. BaSO4 is a white color precipitate. Knowing the color of the precipitate, one can identify the type of cation or anion present in solution.

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