You measure out 4.2 mL of an aqueous ethylenedliamine (HzNCH2CH2NH2) SolutiIUH I

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You measure out 4.2 mL of an aqueous ethylenedliamine (HzNCH2CH2NH2) SolutiIUH I aque0us sululu oles of ethylenediamine are in the 4.2 mL? |0.066 - 1 mol Submit Answer Answer Submitted: Your final submission will be graded when the time limi Consider the reaction : Nici2-6H2O + 3en [Ni(en)3jd2 + 6H20 You start with 1.02 mol of NiCl2-6H2O and Ni(en)31cl2 7 278.904 SuomiAnswer Answer Submitted: Your final submission will be graded when the time limit 10. In the titration of HCI with NaOH, the equivalence point is determined D from the point where the pink phenolphthalein first turns colorless and then the pink reappears on swirling. 0 from the point where the colorless phenolphthalein first turns pink and then disappears on swirling. D) from the point where the pink phenolphthalein turns colorless and then remains colorless on swirling. ) from the point where the phenolphthalein turns pink and then remains pink on swirling. Submit Answer Tries 0/2 11. In a titration experiment, 11.9 mL of an aqueous HCI solution was titrated with 0.2 M NaOH solution. The eq solution was added. What is the molarity of the HCl solution? HCi molarity Submit Answer Tries 0/2 12. In a titration experiment, 11.2 mu of an aqueous H2sO4 solution was titrated with 0.3 M NaOH solution. The solution was added. What is the molarity of the H2504 solution? H2SO4 molarity- Submit AnswerTries 0/2

Explanation / Answer

Q10

in a titration of strong acid + strong base

we can do this with an indicator

typically, we choose phenolphthalein

which changes from transparent in acidic media to pink in basic medi

therefore, we detect the endpoint when we see the chang ein color

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