Chatshaala discussions:
CUBE Chatshaala: How can I improve this setup to develop Hibiscus pH paper?
My expectation was to get a dark red color, and I got a pink coloration. Thank you for your setup to make turmeric pH paper, @ayanasudheer that inspired me to do with hibiscus petals.
Can we develop PH paper at Homelabs?
Do you have Hibiscus or any colored plant part to make a ph paper to differentiate acid and base ?
@Seethalakhmi @Arunan sir 
@Rechel CUBE @~RAHUL MALAKAR @~Sonawane Vinodkumar and others
Eco-friendly natural dyes for textile fibres prepared by our students
Photo:Rahul
Hibiscus Petals for Making pH Paper at Home!
I took one hibiscus flower, which had 5 petals.
Rubbed the petals over a white paper (5×2.5 cm,:12.5 cm²).
Airdried the paper.
Added drops of water as a control and vinegar (acid) as a test to observe the color change.
Observation: A pink color appeared immediately after the acid was added to the hibiscus paper.
Place: Cherukkad Kozhikode
Date:3/03/2025
Time:4pm
Photo: Theertha
Hibiscus Petals for Making pH Paper at Home!
Observation: A pink color appeared immediately after the acid was added to the hibiscus paper.
Place: Cherukkad Kozhikode
Date:3/03/2025
Time:4pm
Photo: Theertha
Clitoria ternatea for Acid-base testing at home
Preparation of pH paper: Clitoria flower is rubbed over a white sheet of paper. Kept 2 minutes for drying.
Testing Acid and base:
A drop of vinegar is added to one end of the paper. A drop of soap detergent is added to another end.
Observation: Paper turned from blue to PINK when vinegar is added. Paper turned from blue to GREEN when soap detergent is added
30/03/25; 5.14pm
Kozhikode, Kerala
Photo: Ayana
Turmeric paper as natural pH paper.
When soap detergent was added, yellow colour turned to RED.
When citrus was rubbed on the red colored region, the colour changed back to YELLOW
28/03/25; 3. 35pm
Nallalam, Kozhikode
Video: Ayana
When lemon is rubbed, blue colour of the clitoria is turned to PINK
30/03/25; 5.53pm
Photo: Ayana
@Vijaya Tilak CUBE @Theertha
Tried the same with Periwinkle!!
30/03/2025; 6.06pm
Nallalam, Kozhikode
Photo: Ayana
When lemon extract is applied, the colour of periwinkle stain turned to Pink and when soap water is added, colour turned to Light Green
I tried using Purple petunia flower. Vinegar turned purple to greenish and soap turned purple to light brown.
Colour Change Detection Using Hibiscus: Acid and Alkali :A Way to Develop pH Paper at Home
I took 9 hibiscus flowers and grinded with ~50 ml of water. The extract was then filtered and divided into three bottles labeled C, T1, and T2.
Bottle C (control) was halffilled with the extract and then added with water.
Bottle T1 was halffilled with the extract and treated with vinegar (acid).
Bottle T2 was halffilled with the extract and treated with soap water (alkali).
Observations:
After shaking, the control (C) showed the same color as initially observed.
Test 1 (T1), treated with acid (vinegar), turned red.
Test 2 (T2), treated with alkali (soap water), turned green.Date:30/03/2025
CUBE Homelab Cherukkad Kozhikode.
Observations:
After shaking, the control (C) showed the same color as initially observed.
Test 1 (T1), treated with acid (vinegar), turned red.
Test 2 (T2), treated with alkali (soap water), turned green.
CUBE Homelab Cherukkad Kozhikode.
