Up next in How to Do Fun Tech & Science Projects (52 videos)
Teach your children technical skills and science in fun ways with the tech and science projects in this Howcast video series.
You Will Need
- A glass of water
- A medicine dropper
- 1 molar sodium hydroxide solution
- Two empty glasses
- 3 molar hydrochloric acid
Fill a glass and add sodium hydroxide
Fill a glass with 4 ounces of water and use a medicine dropper to add two drops of sodium hydroxide solution.
Place phenolphthalein in glass
Place three drops of phenolphthalein solution into one of the empty glasses.
Place acid into glass
Place three drops of hydrochloric acid into the other empty glass. Be sure to keep track of which glass is which.
Pour water into phenolphthalein glass
Pour the water and sodium hydroxide solution into the glass with the phenolphthalein solution to make the water turn red.
Pour "wine" into acid glass
Pour the red water, or "wine," into the glass with the hydrochloric acid to neutralize the phenolphthalein and return it to its clear state. Stand back and enjoy the applause.