(b) phenol red (phenol sulphonephthalein) Of the two colour changes undergone by this
indicator only the one at pH 6.8–8.4 is commonly employed.
(c) methyl orange
chris devlin
(Chris Devlin)
#1
(b) phenol red (phenol sulphonephthalein) Of the two colour changes undergone by this
indicator only the one at pH 6.8–8.4 is commonly employed.
(c) methyl orange