This Instructable shows how to determine whether or not your liquid is Sodium Hydroxide.
Materials: Liquid, a beaker, some aluminum foil, and litmus paper.
Step 1: Instructions
Pour some of your liquid into a beaker.
Drop in the ball of tin foil.
Watch the liquid. If it bubbles you might have sodium hydroxide. If there is no reaction, you do not.
Clean the beaker.
Pour some of your liquid into the beaker.
Dip your litmus paper into the liquid.
When you look at the litmus paper, if its a dark blue, purplish color, you have sodium hydroxide.
Congrats! You have just determined whether or not your liquid is sodium hydroxide.