China Rose as a Natural Indicator Video Lecture | Science Class 7

in a chemistry lab litmus paper is the
most commonly used acid-base indicator
but we can use other substances as
indicators we will look at one of the
options today we will use China rose and
test it with a few acidic and basic
solutions we have dilute HCl lemon juice
sodium hydroxide solution and soap
solution we have prepared China rose
indicator by adding hot water to China
rose petals and leaving it for 30
minutes now at China rose indicator drop
by drop two hydrochloric acid note the
change in color now add China rose
indicator to lemon juice note the change
in color
now add the indicator to sodium
hydroxide solution see the color change
now add the China was indicator drop by
drop to soap solution wait for some time
you will see that China rose indicator
turns acidic solutions into magenta red
and reddish and basic solutions into
yellow and greenish yellow an acid-base
indicator is a substance that indicates
the presence of an acid or base by
changing color so China rose water can
be used as an acid-base indicator there
are many other natural indicators that
we can use as acid-base indicators such
as turmeric why don't you try this
activity at home