pH curves, titrations and indicators Flashcards
1
Q
what does a strong acid-strong base pH curve look like + what indicator to use?
A
indicator: phenylphthalein
colour at high pH = pink
colour at low pH = colourless
pH range of colour change = 8.2-10.0
2
Q
what does a strong acid-weak base pH curve look like + what indicator to use?
A
indicator: methyl orange
colour at high pH = yellow
colour at low pH = red
ph range of colour change = 3.2-4.4
3
Q
what does a weak acid-strong base pH curve look like + what indicator to use?
A
indicator: phenylphthalein
colour at high pH = pink
colour at low pH = colourless
pH range of colour change = 8.2-10.0
4
Q
what does a weak acid-weak base pH curve look like + what indicator to use?
A
no indicator to use
because the colour change happens over a range of volumes (x-axis).
