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

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8. pH=13 100ml distilled water + 1ml NaOH
8. pH=13 100ml distilled water + 1ml NaOH
[[File:WechatIMG420.jpeg|400px]][[File:WechatIMG430.jpeg|400px]]
[[File:WechatIMG420.jpeg|400px]]
after 5 minutes change to yellow
[[File:WechatIMG430.jpeg|400px]]




Revision as of 16:20, 10 January 2018

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References

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

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