2007-02-22 22:44:38 · 4 answers · asked by Amy Mangal 1 in Science & Mathematics ➔ Chemistry
Didn't find any common pH indicator that is blue at pH<9 and colourless at pH >9.
The opposite is true for thymolpthalein : pH range=9.3-10.5 and it is colourless at about pH <9 and blue at about pH>9
2007-02-22 23:04:07 · answer #1 · answered by bellerophon 6 · 0⤊ 0⤋
pH indicator turns blue between ph 7 and pH 14.
It turns blue only if the substance is basic in nature.
for ex:
If you test Sodium Hydroxide(NaOH) the pH indicator turns blue as the substance is a base.
2007-02-22 23:16:05 · answer #2 · answered by Ray 2 · 0⤊ 1⤋
Phenolthalien
2007-02-22 22:58:02 · answer #3 · answered by Anonymous · 0⤊ 1⤋
wow..its been along time since that type of science class but im pretty sure its the kind made with the purple cabbage =o (i really dont know if that helps or not)
2007-02-22 22:59:19 · answer #4 · answered by Cameron M 1 · 0⤊ 2⤋