ĭilute Acetic Acid (CH3 CO OH) (White Vinegar) To perform this demonstration you will need: If you find the Instructables I post interesting please click the "Follow" button above. Follow all warnings and cautions on chemicals. You can see more info on phenolphthalein on Wikipedia.
This presentation has multiple uses - As a magic trick, as a purely scientific demonstration, as an object lesson, as a metaphor for damage and restoration or sin and repentance, and many others. The color change takes place almost instantaneously - which is amazing to watch! Then by adding the indicating solution, Phenolphthalein Solution (C20 H14 O4), it turns the water a striking pink color indicating that the solution has a basic pH.įinally the water is transformed back to clear by adding vinegar (Dilute Acetic Acid CH3 CO OH) to bring the solution back to a neutral pH, and the pink indicator disappears. Not to be confused with Sodium Bicarbonate which is Baking Soda. This is a very visual demonstration using an indicator to identify the pH of a solution as an acid or a base.įirst the water is made to have a basic pH by adding Sodium Carbonate (Na2 CO3). Well, not really magic, but chemistry and still amazing! Water changing from CLEAR to BRIGHT PINK and back to CLEAR!
0 kommentar(er)
