1 tube, heat by 2 minutes in boiling water boil. C 2 insert the tube of acid 5 drops of the concentrated Semitic. 3 insert the tube solution NaOH 6 mol/dm ³. 4 Insert the tube ethanol 95% 5 drops 5 insert the tube solution 0.5 mol/dm ³ 5 drops. Observe the changes save the results.
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