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Phenolphthalein - Wikipedia


Phenolphthalein is a chemical compound with the formula C20H14O4 and is often written as ... Phenolphthalein is slightly soluble in water and usually is dissolved in ... This reaction leads to the p...

Color-Changing Chemistry - Home Science Tools


Learn about acids and bases as you perform amazing color-changing chemistry ... To change it back to "water," all you had to do was add the acidic vinegar, ... Use phenolphthalein solution to write a message on a piece of paper and let it dry.

Why Does a Color Change Indicate a Chemical ... - NSTA News


Jan 20, 2006 ... Why Does a Color Change Indicate a Chemical Change? ... Water is composed of a particular combination of hydrogen and oxygen ... The phenolphthalein is clear before you add the base, and it turns pink after you add it.

Magic Breath


200 mL beaker of water; 10 - 12 drops of phenolphthalein; 3 mL of lime water ( saturated calcium ... a bit with the amount so that you do not have to blow forever to get it to change colors. ... Insert the straw into the beaker and blow OUTWARD.

Research the Topic - How does phenolphthalein work? Part 1

researchthetopic.wikispaces.com/How does phenolphthalein work? Part 1

Sep 30, 2011 ... It can be a powder or a liquid, but can only be used as a liquid(adding water to the powder makes it ... The reason phenolphthalein changes color is because although the ... Therefore, when you expose phenolphthalein to acidic solutions, ... such as pure water, turns the litmus paper into a color in between ...

Phenolphthalein, pH and Soap | Summer Bee Meadow ...


Jun 16, 2010 ... So, don't say "phenol" when you mean "phenolphthalein". ... specifically, because it's range of measurable color change due to pH ... and that phenolphthalein is soluble in alcohol, but not soluble in water. ... When the solution is as clear as it will get, add a drop or two of phenolphthalei...

John Graham-Cumming: Fun with Phenolphthalein


Mar 13, 2012 ... If you do this experiment be careful and protect yourself. ... solution (which is typically dissolved in alcohol) and mix with 90ml of water. 3. ... It will instantly change colour as the indicator reaction happens. ... Another experiment is to take the remaining phenolphthalein solution and add an acid (lemon juice, ...

Lab 4: Chemical and Physical Changes - Chemistry Land


Color Change: A chemical change means the substance changes into another substance. ... The physical properties you will identify are color, form (solid or liquid), odor (if it has ... SOLUBILITY IN WATER: Add a small amount of sugar to an empty test tube and fill ..... Adding phenolphthalein to sodium bicarbonate solution.



if the water becomes pink upon addition of the phenolphthalein powder, add. Sulfuric Acid ... Continue to add drops until the color changes from green to pink. ... NOTE: If you wish to express the results of these tests in mg/L as sodium chloride ...

Carbon Dioxide Can Make a Solution Acidic | Chapter 6: Chemical ...


The teacher blows into a universal indicator solution until it changes color. ... Do a demonstration to show that adding CO2 gas to water can make the water become acidic. ... What does the color change tell you about the pH of the indicator solution? .... Explain that Alka-Seltzer® contains powdered acids and a base.