Vanishing Valentine Materials
- 100 ml of a 0.133 M dextrose solution (C6H12O6)
- 100 ml of a 1.0 M sodium hydroxide solution (NaOH)
- 1 ml of a 0.1% resazurin solution
- a 250-ml or 500 ml Erlenmeyer flask or separatory funnel (resembles a heart)
- stopper for the flask
- dropper or pipette
Prepare the SolutionsDextrose Solution: Dissolve 2.4 g of dextrose in distilled or deionized water to make 100 ml of solution. Sodium Hydroxide Solution: Prepare the 1.0 M sodium hydroxide solution by dissolving 4.0 g of sodium hydroxide in enough distilled or deionized water to make 100 ml of solution. Add the sodium hydroxide a little at time, stirring constantly. Heat is evolved from this reaction.
Resazurin Solution: Dissolve 0.1 g of resazurin in distilled or deionized water to make 100 ml of solution. The shelf life of resazurin solution is 6-12 months. This solution should be a deep blue color.