What is universal indicator?
It is a mixture of a variety of other indicators and can be used to measure the approximate pH of a solution, however a more accurate value can be obtained using a pH probe
When universal indicator is added to a solution it changes to a colour that shows the pH of the solution (using the ph scale)
o STRONG ACIDS: red (0)
o
WEAK ACIDS: yellow (2)
o NEUTRAL: green (7)
o WEAK ALKALIS: blue light/dark (10-11)
o STRONG ALKALIS: purple (14)
No comments:
Post a Comment