237
edits
GMU:DIY Biolab “Driver’s License”/Yang Li (view source)
Revision as of 13:48, 19 January 2018
, 19 January 2018no edit summary
No edit summary |
No edit summary |
||
| Line 15: | Line 15: | ||
[[File:12.6 bio-lab first idea.008.jpeg|400px]] | [[File:12.6 bio-lab first idea.008.jpeg|400px]] | ||
12.12.2017 | '''12.12.2017''' | ||
I use red cabbage to make pH indicator. The pH solution from 2 to 13. | |||
The red cabbage solution | The red cabbage solution | ||
| Line 68: | Line 68: | ||
3. Using different pH level solutions react with the organic stuff (which has anthocyanin), see the result | 3. Using different pH level solutions react with the organic stuff (which has anthocyanin), see the result | ||
17.1.2018 | '''17.1.2018''' | ||
However, there’s a problem which I’m not sure: | However, there’s a problem which I’m not sure: | ||
| Line 101: | Line 101: | ||
[[File:4591516359873_.pic_hd.jpg|400px]] | [[File:4591516359873_.pic_hd.jpg|400px]] | ||
19.1.2018 | '''19.1.2018''' | ||
I did the experiment of reversibility of colour change. | I did the experiment of reversibility of colour change. | ||
2ml pH=2 + 2ml pH=9 | 5ml red cabbage solution + 2ml pH=2 + 2ml pH=9 | ||
[[File:4601516362910_.pic_hd.jpg|400px]] | [[File:4601516362910_.pic_hd.jpg|400px]] | ||
2ml pH=2 + 2ml pH=11 | 5ml red cabbage solution + 2ml pH=2 + 2ml pH=11 | ||
[[File:4631516362932_.pic_hd.jpg|400px]] | [[File:4631516362932_.pic_hd.jpg|400px]] | ||
2ml pH=2 + 2ml pH=13 | 5ml red cabbage solution + 2ml pH=2 + 2ml pH=13 | ||
[[File:4621516362920_.pic_hd.jpg|400px]] | [[File:4621516362920_.pic_hd.jpg|400px]] | ||
2ml pH=4 + 2ml pH=9 | 5ml red cabbage solution + 2ml pH=4 + 2ml pH=9 | ||
[[File:4641516362943_.pic_hd.jpg|400px]] | [[File:4641516362943_.pic_hd.jpg|400px]] | ||
pH of expresso coffee is around 6, I add solution (pH=9) into solution 1/2/3, | And then I use reversibility of colour change to make the colour of coffee more obviously. | ||
pH of expresso coffee is around 6, I add solution (pH=9) into the original solution 1/2/3, the colour changing is more obviously. | |||
[[File:4581516359845_.pic_hd.jpg|400px]] | [[File:4581516359845_.pic_hd.jpg|400px]] | ||
However, when I change another kind of coffee and do the experiment in the same way, the colour cannot be seen obviously. | However, when I change another kind of coffee and do the experiment in the same way, the colour change cannot be seen obviously. Maybe because the different ingredients of coffee. | ||
[[File:4651516368126_.pic_hd.jpg|400px]] | [[File:4651516368126_.pic_hd.jpg|400px]] | ||