indicators and their colours and ph curves Flashcards
1
Q
What is the PH range for methyl orange?
A
= 3.2-4.4
= in acid red
= in base, yellow
2
Q
What is the PH range in phenophylen?
A
= 8.2-10
= colour in acid, colourless
= colour in base, pink
3
Q
Why must be add inictaor slowly?
A
= one extra drop of the indicator, may go beyond the equalvalnece end point, so becmes colourless,
4
Q
What is the strong acid strong base curve?
A
= strarts at 1
= equaivalebce point at 7
What
5
Q
What is strong acid weak base?
A
= starts at 1, equvalence point <7
6
Q
What is weak acid strong base/
A
= eulvalence point is beyond 7, starts at 3 >7
7
Q
A
