# Developing Acid-Base indicator in Homelabs
**URL:** https://metastudio.org/t/developing-acid-base-indicator-in-homelabs/15583
**Category:** CUBE chat
**Created:** [March 29, 2025, 2:47pm UTC](https://metastudio.org/t/developing-acid-base-indicator-in-homelabs/15583 "2025-03-29T14:47:37Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@Theertha](https://metastudio.org/u/Theertha)
#### Post date: [March 29, 2025, 2:47pm UTC](https://metastudio.org/t/developing-acid-base-indicator-in-homelabs/15583/1 "2025-03-29T14:47:37Z")
[10:27 pm, 28/3/2025] Theertha: What is bio-inorganic chemistry @Seethalakhmi
Congratulations to @Susanta Tanti CUBE for bringing new Cubists to Chatshaala.
[10:27 pm, 28/3/2025] Theertha: Can anyone predict what this picture is about?
@ayanasudheer @~RAHUL MALAKAR @Sakshi @Akanksha CUBE and others
[10:27 pm, 28/3/2025] Theertha: Seethalakshmi says Homelab is a Hero,Do you agree?
How does Homelab work?
How can we perform pH detection in college?
Listed Homelab Acid-Base indicater:
1. Turmeric
2)petals of Hibiscus
3)Petals of clitoria
4)Red cabbage
2. Beetroot
How does each of the above show a colour difference?
@ayanasudheer @Seethalakhmi @Sakshi @~RAHUL MALAKAR &others
[10:27 pm, 28/3/2025] Theertha: Can we list Acid-Base indicators from Homelabs?
@Vijaya Tilak CUBE @Susanta Tanti CUBE @Chithra Ma’am and others
Photo:Ayana
I took the petals of a Hibiscus, rubbed them over a white paper and placed a few drops of synthetic vinegar after drying the paper. observed a pink color.Photo:Theertha
Any comments ?@ayanasudheer @Susanta Tanti CUBE and others
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### Author:  [@Theertha](https://metastudio.org/u/Theertha)
#### Post date: [March 29, 2025, 2:49pm UTC](https://metastudio.org/t/developing-acid-base-indicator-in-homelabs/15583/2 "2025-03-29T14:49:20Z")
CUBE Chatshaala:28/03/2025
---
### Author:  [@Theertha](https://metastudio.org/u/Theertha)
#### Post date: [March 30, 2025, 4:07pm UTC](https://metastudio.org/t/developing-acid-base-indicator-in-homelabs/15583/3 "2025-03-30T16:07:26Z")
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 half-filled with the extract and then added with water.
Bottle T1 was half-filled with the extract and treated with vinegar (acid).
Bottle T2 was half-filled 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.
---
### Author:  [@Theertha](https://metastudio.org/u/Theertha)
#### Post date: [April 5, 2025, 5:11am UTC](https://metastudio.org/t/developing-acid-base-indicator-in-homelabs/15583/4 "2025-04-05T05:11:31Z")
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.
[https://drive.google.com/file/d/1a2kYDDc\_vX5mouzPtBCNc2tb3y37sGOA/view?usp=drivesdk](https://drive.google.com/file/d/1a2kYDDc_vX5mouzPtBCNc2tb3y37sGOA/view?usp=drivesdk)
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.
---
### Author:  [@Theertha](https://metastudio.org/u/Theertha)
#### Post date: [April 5, 2025, 5:14am UTC](https://metastudio.org/t/developing-acid-base-indicator-in-homelabs/15583/5 "2025-04-05T05:14:27Z")
Chatshaala discussions and it’s follow up
Anthocyanins are flavonoid pigments synthesized in the cytoplasm and stored inside vacuoles. Many plant species accumulate densely packed, 3- to 10-μm diameter anthocyanin deposits called anthocyanin vacuolar inclusions (Ahttps://pmc.ncbi.nlm.nih.gov/articles/PMC4815043/#:~:text=Anthocyanins%20are%20flavonoid%20pigments%20synthesized,anthocyanin%20vacuolar%20inclusions%20(AVIs).
Objective: To observe if there is any color change when I add a drop of vinegar to the hibiscus petal.
Set-up: Two hibiscus petals were taken.
Petal 1 (Control): Added two drops of water.
Petal 2 (Test): Added two drops of vinegar.
Observation: No color change was observed just after adding the Vineger and water.
Place:Cherukkad Kozhikode
Date:2/04/2025
Time:6.33pm
Photo: Theertha
But after some time, a light pink color was observed. What do you say ?@ayanasudheer @Kiran CUBE
Place:Cherukkad Kozhikode
Date:2/04/2025
Photo: Theertha
In the hibiscus petal, neither vinegar nor water drops caused any color change just after adding.With the hibiscus pH paper, a pale pink color appeared immediately just after adding the vinegar drop, while no color change was observed when water drops were added.
Date:2/04/2025
Time:6.40pm
Place:Cherukkad Kozhikode
Photo: Theertha