modified 8 years ago

Chemical Test For Polarity

00:17:18

This  test indicates negative polarity terminal.  Soak filter paper in solution of 1 gram of phenolphthalein dissolved in small quantity of alcohol to which has been added 100 c.c. of 10% solution of potassium chloride.  After soaked paper has dried,  cut paper into small strips to use for testing.  Paper on negative terminal will show a bright red stain.

published 8 years ago

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