The piperazine content of an impure commercial material can be determined by precipitating and weighing the diacetate: :NH HN: + 2CH CO,H → HẠN → HẠN NH,(CH,CO,), Acetic acid FM 60.052 Piperazine FM 86.136 Piperazine diacetate FM 206.240 In one experiment. 0.3126 g of sample was dissolved in 25 mL of acetone, and 1 mL of acetic acid was added. After 5 min, the precipitate was filtered, washed with acetone, dried at 1108°C, and found to weight 0.7121 g. Find the wt% of piperazine in the sample.

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The piperazine content of an impure commercial material can be determined by precipitating
and weighing the diacetate:
:NH HN: + 2CH CO,H → HẠN
Piperazine
FM 86.136
→ HẠN NH,(CH,CO,),
Acetic acid
FM 60.052
Piperazine diacetate
FM 206.240
In one experiment. 0.3126 g of sample was dissolved in 25 mL of acetone, and 1 mL of acetic acid
was added. After 5 min, the precipitate was filtered, washed with acetone, dried at 1108°C, and
found to weight 0.7121 g. Find the wt% of piperazine in the sample.
Transcribed Image Text:The piperazine content of an impure commercial material can be determined by precipitating and weighing the diacetate: :NH HN: + 2CH CO,H → HẠN Piperazine FM 86.136 → HẠN NH,(CH,CO,), Acetic acid FM 60.052 Piperazine diacetate FM 206.240 In one experiment. 0.3126 g of sample was dissolved in 25 mL of acetone, and 1 mL of acetic acid was added. After 5 min, the precipitate was filtered, washed with acetone, dried at 1108°C, and found to weight 0.7121 g. Find the wt% of piperazine in the sample.
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