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

Revision as of 16:32, 10 January 2018

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

The red cabbage solution

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

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

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

4. pH=7 100ml distilled water

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

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

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

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

after 5 minutes change to yellow

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

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	~~Next step~~:		Furthur steps:

	1. Rate of colour change		1. Rate of colour change