(4) You have an unknown containing 2 anions. With the AgNO, test, you observe a

Question

(4) You have an unknown containing 2 anions. With the AgNO, test, you observe a white precipitate that does not dissolve when acidified. With the BaClh test, you observe no precipitate at all. Which ions are you SURE are not in your unknown? Select all that apply A) No. (5) Students weighted out 0.998 grams of [Co(NHs)SCIJCly and performed the same synthesis experiment that you performed in lab. They obtained 0.885 grams of their product Co(NH,)5(ONO)JCh. Calculate the percent yield of their reaction, The molar mass of the reactant was 250 g/mol and the molar mass of the synthesized product was 261 g/mol. Show your calculation for full credit (6) In the kinetics lab a group of students performed an isomerization reaction by putting their synthesized sample into a warm constant temperature bath Co(NHa)s(ONO)2]- [Co(NHa)s(NO2)2'] A group of students plotted the In(ct) vs time and obtained the following linear regression from their data. Y -0.155(X)+0.9 What is the rate constant?

Explanation / Answer

4.

NO3-

SO42-

PO43-

SO32-

CO32-

ions are not present.

Becuase NO3- does not form any precipitate with AgNO3

SO42- and PO43- can form precipitate with BaCl2 solution also.

SO32- and CO32- can form precipitate with AgNO3 but dissolve in acidification.

So, these three ions

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