Dear sir/mam, i have got different values pH scale and the colour changes are also different in some samples - Science - Finding pH of Different Solutions

Question

Dear sir/mam,
i have got different values pH scale
and the colour changes are also different in some samples i havent
used different solutions ,they are the same as the one in this
video how is this possible ? are there different types of pH paper
or is there any mistake in the activity

Kirti Gogia · Accepted Answer

It is not necessary that a given chemical substance obtained
from two different sources will always show exactly the same
results Depending upon the method of preparation, storing and
methods employing for purification of substance, a slight variation
in properties such as melting point, boiling point, density and
even pH may be observed In fact a slight variation in observed
values is expected, since working conditions are different
everywhere As long as the pH values and colour changes are not
drastically different, it is not a cause of worry Similar pH values
and colour changes for the same substance are very much
acceptable

Dear sir/mam, i have got different values pH scale and the colour changes are also different in some samples. i havent used different solutions ,they are the same as the one in this video. how is this possible ? are there different types of pH paper or is there any mistake in the activity.

Dear sir/mam,

i have got different values pH scale and the colour changes are also different in some samples. i havent used different solutions ,they are the same as the one in this video. how is this possible ? are there different types of pH paper or is there any mistake in the activity.