GMU:DIY Biolab “Driver’s License”/Yang Li: Difference between revisions

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==References==
==References==
* https://ellieirons.com/projects/two-meadows/
* https://ellieirons.com/projects/two-meadows/


I use red cabbage to make pH indicator. The pH solution from 2 to 13.
I use red cabbage to make pH indicator. The pH solution from 2 to 13.
The red cabbage solution


[[File:WechatIMG440.jpeg|400px]]
[[File:WechatIMG440.jpeg|400px]]
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Next step:
Next step:
1. Rate of colour change
1. Rate of colour change
2. Reversibility of colour change
2. Reversibility of colour change

Revision as of 16:22, 10 January 2018

12.6 bio-lab first idea.001.jpeg

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References


I use red cabbage to make pH indicator. The pH solution from 2 to 13.

The red cabbage solution

WechatIMG440.jpeg

1. pH=2 100ml distilled water + 1ml HCL

WechatIMG418.jpeg

2. pH=4 100ml distilled water + 0.1g apple acid

WechatIMG438.jpeg

3. pH=5.5 100ml distilled water + 2g H3BO3(Boric acid)

WechatIMG433.jpeg

4. pH=7 100ml distilled water

WechatIMG429.jpeg

5. pH=8 100ml distilled water + 0.5g NaHCO3

WechatIMG436.jpeg

6. pH=11 700ml distilled water + 1ml NaOH

WechatIMG427.jpeg

7. pH=12 250ml distilled water + 1ml NaOH

WechatIMG424.jpeg

8. pH=13 100ml distilled water + 1ml NaOH

WechatIMG420.jpeg

after 5 minutes change to yellow

WechatIMG430.jpeg


Next step:

1. Rate of colour change

2. Reversibility of colour change