iz: Cumulative quiz-x C Chegg Study | Guided Solut u/courses/28726/quizzes/10343

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iz: Cumulative quiz-x C Chegg Study | Guided Solut u/courses/28726/quizzes/103433/take D Question 2 8 pts If you were given with a solution that contains AP.??». ???, and Pb-cations as contaminants, what will be the right sequence of addition of the following solutions to precipitate ONLY one element at a time? 1.0M NaCI 1.0M NaOH 10M Na SO 1.0M Na CO O Na2CO3, NaOH, NaCl and finally Na2s04 Na2CO3, Naci, NaOH and finally Na2S04 O NaCI, Na2CO3, NaCI and finally Na2S04 O NaCI, NaOH, Na2CO3 and finally Na2504 O NaCI, NaOH, Na2504 and finally Na2CO3 Question3 5 pts DELL

Explanation / Answer

The right sequence will be NaCl, NaOH, Na2CO3 and finally Na2SO4

The reason being the order in which the precipitates will be formed.

Initially, the NaCl will interact with Ba2+ and Pb2+ to form BaCl2 and PbCl2 (Mostly white precipitate).

Then NaOH will interact with Ca2+ and the residual Ba2+ to form Ca(OH)2 and Ba(OH)2

After this, the addition of Na2CO3 will interact with remaining Pb2+ to form PbCO3 .

At the end, the Na2SO4 will interact with Al3+ to form Na2AlSO4

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