Some great colours for #GardenIndicators here
#IteachChem 🥽
Chemistry and art: Students are investigating the effect of pH on dye color. I’m obsessed with the bright orange from annatto seeds!
Chemistry and art: Students are investigating the effect of pH on dye color. I’m obsessed with the bright orange from annatto seeds!
November 20, 2024 at 10:28 PM
Some great colours for #GardenIndicators here
At this time of year the number of available #Gardenindicators is more limited. However, we’ve been making some classic pH indicators too. Interesting range of colours in the methyl phenolphthalein series #Chemsky youtu.be/lcHvVRApqaQ?...
Colourful Phenolphthalein pH Indicator Selection
YouTube video by Gardenindicators
youtu.be
December 8, 2024 at 7:38 AM
At this time of year the number of available #Gardenindicators is more limited. However, we’ve been making some classic pH indicators too. Interesting range of colours in the methyl phenolphthalein series #Chemsky youtu.be/lcHvVRApqaQ?...
Day 2 of #ChemAdvent24 looks at how a colour-changing indicator can be made from festive poinsettia leaves.
This is possible because they contain anthocyanins, which undergo structural changes in acidic and alkaline solutions.
#GardenIndicators #ChemSky 🧪
This is possible because they contain anthocyanins, which undergo structural changes in acidic and alkaline solutions.
#GardenIndicators #ChemSky 🧪
December 2, 2024 at 11:29 AM
Day 2 of #ChemAdvent24 looks at how a colour-changing indicator can be made from festive poinsettia leaves.
This is possible because they contain anthocyanins, which undergo structural changes in acidic and alkaline solutions.
#GardenIndicators #ChemSky 🧪
This is possible because they contain anthocyanins, which undergo structural changes in acidic and alkaline solutions.
#GardenIndicators #ChemSky 🧪
As well as #Gardenindicators experiments, since June we’ve been making some the more unfamiliar phenolphthalein-derived pH indicators. So far the colour range is pink to teal youtu.be/ySd5xmq4L0A?...
Colourful Phenolphthalein pH Indicators!
YouTube video by Gardenindicators
youtu.be
November 12, 2024 at 8:07 AM
As well as #Gardenindicators experiments, since June we’ve been making some the more unfamiliar phenolphthalein-derived pH indicators. So far the colour range is pink to teal youtu.be/ySd5xmq4L0A?...
November 8, 2024 at 11:58 PM
Thank you very much @crocodilechemi1.bsky.social for the purple runner beans you sent, they gave very nice #Gardenindicators colours! The low pH pink is beautiful. This is the first video I have made that shows the extraction of the plant material. youtu.be/o7GpWCL6guk?...
Anthocyanin Extraction: Purple Runner Bean
YouTube video by Gardenindicators
youtu.be
November 17, 2024 at 7:45 AM
Thank you very much @crocodilechemi1.bsky.social for the purple runner beans you sent, they gave very nice #Gardenindicators colours! The low pH pink is beautiful. This is the first video I have made that shows the extraction of the plant material. youtu.be/o7GpWCL6guk?...
Here’s the pH evaluation of a red sweet pea from my garden. A cheeky blue around pH 8-10 is always a bonus! #GardenIndicators
November 24, 2024 at 8:57 AM
Here’s the pH evaluation of a red sweet pea from my garden. A cheeky blue around pH 8-10 is always a bonus! #GardenIndicators
#gardenindicators in action: testing to see if our student’s soap is safe for the skin
#gardenindicators in print:
How to find acids with flowers: Robert Boyle’s ‘syrrup of violets’ and the chemistry of color indicators
link.springer.com/article/10.1...
#gardenindicators in print:
How to find acids with flowers: Robert Boyle’s ‘syrrup of violets’ and the chemistry of color indicators
link.springer.com/article/10.1...
November 7, 2025 at 12:33 PM
#gardenindicators in action: testing to see if our student’s soap is safe for the skin
#gardenindicators in print:
How to find acids with flowers: Robert Boyle’s ‘syrrup of violets’ and the chemistry of color indicators
link.springer.com/article/10.1...
#gardenindicators in print:
How to find acids with flowers: Robert Boyle’s ‘syrrup of violets’ and the chemistry of color indicators
link.springer.com/article/10.1...
March 4, 2025 at 3:39 PM
Hydrangeas are a #Gardenindicators favourite, although the blue ones can be difficult to get extracts from. In this video, red hydrangea extract mixed with metal salts provides some colourful results. youtu.be/27nrO-4DEgg?...
Colourful Complexes: Hydrangea Colours-Updated
YouTube video by Gardenindicators
youtu.be
November 30, 2024 at 8:21 AM
Hydrangeas are a #Gardenindicators favourite, although the blue ones can be difficult to get extracts from. In this video, red hydrangea extract mixed with metal salts provides some colourful results. youtu.be/27nrO-4DEgg?...
Pickled Red Cabbage as a pH indicator!
YouTube video by Gardenindicators
youtu.be
May 9, 2026 at 10:50 AM
I got a nice #Gardenindicators gift this week from
@AlchemistAngus. A can of crushed pineapple! The anthocyanins in blackberry extract can be used to detect dissolved tin(II) ions in the pineapple juice. The anthocyanin/tin complexes give a lovely purple colour! #Chemsky
@AlchemistAngus. A can of crushed pineapple! The anthocyanins in blackberry extract can be used to detect dissolved tin(II) ions in the pineapple juice. The anthocyanin/tin complexes give a lovely purple colour! #Chemsky
March 7, 2025 at 10:14 AM
I got a nice #Gardenindicators gift this week from
@AlchemistAngus. A can of crushed pineapple! The anthocyanins in blackberry extract can be used to detect dissolved tin(II) ions in the pineapple juice. The anthocyanin/tin complexes give a lovely purple colour! #Chemsky
@AlchemistAngus. A can of crushed pineapple! The anthocyanins in blackberry extract can be used to detect dissolved tin(II) ions in the pineapple juice. The anthocyanin/tin complexes give a lovely purple colour! #Chemsky
Beautiful #GardenIndicators evaluation of an oxalis! Look at those colours! Wow!
Thank you very much to @AlchemistAngus (on another platform currently) for this stunning #Gardenindicators specimen. We now have a lab oxalis to join our poinsettia! A video will appear on YouTube soon. #Chemsky
November 26, 2024 at 8:30 PM
Beautiful #GardenIndicators evaluation of an oxalis! Look at those colours! Wow!
Any #Chemsky peeps who are still on the Bad Place, please try to persuade the #GardenIndicators folk this way. Their content is wonderful and I miss them 😢
Trying to persuade the #GardenIndicators crew over here, too. Here’s one I made from foxgloves!
A fantastic range of garden indicators crowdsourced and catalogued in the spreadsheet here: docs.google.com/spreadsheets...
#ChatChemistry #Chemsky
A fantastic range of garden indicators crowdsourced and catalogued in the spreadsheet here: docs.google.com/spreadsheets...
#ChatChemistry #Chemsky
November 11, 2024 at 9:34 PM
Any #Chemsky peeps who are still on the Bad Place, please try to persuade the #GardenIndicators folk this way. Their content is wonderful and I miss them 😢
If anyone uses #Gardenindicators in teaching, videos of various fruit, flowers and vegetables are posted here www.youtube.com/@Gardenindicators/videos. They are there for any teachers/educators to use. Not just plants, there are some classic pH indicators there too.
November 9, 2024 at 10:32 PM
If anyone uses #Gardenindicators in teaching, videos of various fruit, flowers and vegetables are posted here www.youtube.com/@Gardenindicators/videos. They are there for any teachers/educators to use. Not just plants, there are some classic pH indicators there too.
You have also inspired a new gin and tonic colour! #Gardenindicators
September 20, 2025 at 7:40 PM
You have also inspired a new gin and tonic colour! #Gardenindicators
I’m seeing poinsettias in the shops now, these make great #Gardenindicators! but they can change colour other ways too youtu.be/xpFA3wMbxOA?...
Anthocyanin Bleaching: Poinsettia
YouTube video by Gardenindicators
youtu.be
November 13, 2024 at 10:11 PM
I’m seeing poinsettias in the shops now, these make great #Gardenindicators! but they can change colour other ways too youtu.be/xpFA3wMbxOA?...
A colourful and quick experiment with tinned pineapple juice youtu.be/n62zByID52I?si…#Gardenindicatorsr#Snackindicatorsr#Chemskyky
Colour changing fruit juice from a tin can!
YouTube video by Gardenindicators
https://youtu.be/n62zByID52I?si…
March 11, 2025 at 7:03 AM
A colourful and quick experiment with tinned pineapple juice youtu.be/n62zByID52I?si…#Gardenindicatorsr#Snackindicatorsr#Chemskyky
It’s a great project – there’s a whole crowd-sourced spreadsheet of indicators and colours here from @crocodilechemi1.bsky.social: docs.google.com/spreadsheets...
#GardenIndicators
docs.google.com
November 21, 2024 at 7:35 AM
It’s a great project – there’s a whole crowd-sourced spreadsheet of indicators and colours here from @crocodilechemi1.bsky.social: docs.google.com/spreadsheets...
Hey, #Chemsky, give Crocodile Chemist a follow! Yay for more #GardenIndicators content!
🌺
@crocodilechemi1.bsky.social
🌺
@crocodilechemi1.bsky.social
November 15, 2024 at 10:29 PM
Hey, #Chemsky, give Crocodile Chemist a follow! Yay for more #GardenIndicators content!
🌺
@crocodilechemi1.bsky.social
🌺
@crocodilechemi1.bsky.social
2 years ago, @AlchemistAngus grew some purple carrots in our teaching lab. Remarkably, the dried carrots are still providing extracts 2 years later! Colourful #Gardenindicators results here youtu.be/0oNgtucj2Ak?...
Purple Carrot Anthocyanins - Winter 2024
YouTube video by Gardenindicators
youtu.be
December 1, 2024 at 11:19 AM
2 years ago, @AlchemistAngus grew some purple carrots in our teaching lab. Remarkably, the dried carrots are still providing extracts 2 years later! Colourful #Gardenindicators results here youtu.be/0oNgtucj2Ak?...
#gardenindicators in action
Here’s the recipe:
Holiday Synthesis: Cranberry Lime Pie
www.science.org
November 27, 2025 at 2:57 AM
#gardenindicators in action
I tried a different type of #Gardenindicators experiment earlier this year. I started making bramble whisky in the late summer, this is the finished version after 3 months. Nice colour, quite a sweet taste, a bit like sloe gin. #Chemsky
December 15, 2024 at 4:14 PM
I tried a different type of #Gardenindicators experiment earlier this year. I started making bramble whisky in the late summer, this is the finished version after 3 months. Nice colour, quite a sweet taste, a bit like sloe gin. #Chemsky
It has been a while, but another #Gardenindicators video is now ready. This one shows a cheap and cheerful way to extract blackberries, works for raspberries too. youtu.be/HIV1Tgpa1-g?...
Anthocyanin Extraction: Blackberries (Brambles)
YouTube video by Gardenindicators
youtu.be
May 19, 2025 at 8:14 PM
It has been a while, but another #Gardenindicators video is now ready. This one shows a cheap and cheerful way to extract blackberries, works for raspberries too. youtu.be/HIV1Tgpa1-g?...
Here’s the pH evaluation of a pink & white geranium from pH 1 to 13. The bottom image shows an RGB reaction plot, using actual RGB values to produce an image of the dynamic neutralisation reaction. Lovely purple with Al³⁺ ions too💜#GardenIndicators
November 16, 2024 at 11:28 AM
Here’s the pH evaluation of a pink & white geranium from pH 1 to 13. The bottom image shows an RGB reaction plot, using actual RGB values to produce an image of the dynamic neutralisation reaction. Lovely purple with Al³⁺ ions too💜#GardenIndicators