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Topic: Science
Number of pages / Number of words: 2 / 458
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2) With another 1ml graduated pipet measure 0.10 Ml of the unknown labled “no. XX- 0.10 mL”

3) Add the compounds to the same Erlenmeyer flask

4) Add 2.0 mL of 95% ethanol and 1.5 mL of 2 M sodium hydroxide solution to the flask

5)Stir with magnetic stirrer for 15 minutes or longer if precipitate still forming

(if cloudy after 15 mina heat mixture on a asteam bath or in boiling water for 10 mins then cool to room temp)

When precipitate is complete cool flask in ice-water bath for 10 mins

MEANWHILE--- A)place 4 mL of 4 acetic acid in 95% ethanl in a test tube

B)Repeat this procedure with 2mL of 4% acetic acid in 95 % ethanol (v/v)

Chill the test tubes containing these solutions in the ice water bath...


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2) With another 1ml graduated pipet measure 0.10 Ml of the unknown labled “no. XX- 0.10 mL”

3) Add the compounds to the same Erlenmeyer flask

4) Add 2.0 mL of 95% ethanol and 1.5 mL of 2 M sodium hydroxide solution to the flask

5)Stir with magnetic stirrer for 15 minutes or longer if precipitate still forming

(if cloudy after 15 mina heat mixture on a asteam bath or in boiling water for 10 mins then cool to room temp)

When precipitate is complete cool flask in ice-water bath for 10 mins

MEANWHILE--- A)place 4 mL of 4 acetic acid in 95% ethanl in a test tube

B)Repeat this procedure with 2mL of 4% acetic acid in 95 % ethanol (v/v)

Chill the test tubes containing these solutions in the ice water bath...


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