237
edits
GMU:DIY Biolab “Driver’s License”/Yang Li (view source)
Revision as of 13:30, 19 January 2018
, 19 January 2018no edit summary
No edit summary |
No edit summary |
||
| Line 14: | Line 14: | ||
[[File:12.6 bio-lab first idea.008.jpeg|400px]] | [[File:12.6 bio-lab first idea.008.jpeg|400px]] | ||
12.12.2017 | |||
[[Link title]]I use red cabbage to make pH indicator. The pH solution from 2 to 13. | |||
The red cabbage solution | |||
[[File:WechatIMG440.jpeg|400px]] | |||
1. pH=2 100ml distilled water + 1ml HCL | |||
[[File:WechatIMG418.jpeg|400px]] | |||
2. pH=4 100ml distilled water + 0.1g apple acid | |||
[[File:WechatIMG438.jpeg|400px]] | |||
3. pH=5.5 100ml distilled water + 2g H3BO3(Boric acid) | |||
[[File:WechatIMG433.jpeg|400px]] | |||
4. pH=7 100ml distilled water | |||
[[File:WechatIMG429.jpeg|400px]] | |||
5. pH=8 100ml distilled water + 0.5g NaHCO3 | |||
[[File:WechatIMG436.jpeg|400px]] | |||
6. pH=11 700ml distilled water + 1ml NaOH | |||
[[File:WechatIMG427.jpeg|400px]] | |||
7. pH=12 250ml distilled water + 1ml NaOH | |||
[[File:WechatIMG424.jpeg|400px]] | |||
8. pH=13 100ml distilled water + 1ml NaOH | |||
[[File:WechatIMG420.jpeg|400px]] | |||
after 5 minutes change to yellow | |||
[[File:WechatIMG430.jpeg|400px]] | |||
Furthur steps: | |||
1. Rate of colour change | |||
2. Reversibility of colour change | |||
3. Using different pH level solutions react with the organic stuff (which has anthocyanin), see the result | |||
17.1.2018 | 17.1.2018 | ||
| Line 78: | Line 131: | ||
==References== | ==References== | ||
* https://ellieirons.com/projects/two-meadows/ | * https://ellieirons.com/projects/two-meadows/ | ||