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2. pH=4 100ml distilled water + 0.1g apple acid | 2. pH=4 100ml distilled water + 0.1g apple acid | ||
[[File:WechatIMG438.jpeg|400px]] | [[File:WechatIMG438.jpeg|400px]] | ||
3. pH=5.5 100ml distilled water + 2g H3BO3(Boric acid) | 3. pH=5.5 100ml distilled water + 2g H3BO3(Boric acid) | ||
[[File:WechatIMG433.jpeg|400px]] | [[File:WechatIMG433.jpeg|400px]] | ||
4. pH=7 100ml distilled water | 4. pH=7 100ml distilled water | ||
[[File:WechatIMG429.jpeg|400px]] | [[File:WechatIMG429.jpeg|400px]] | ||
5. pH=8 100ml distilled water + 0.5g NaHCO3 | 5. pH=8 100ml distilled water + 0.5g NaHCO3 | ||
[[File:WechatIMG436.jpeg|400px]] | [[File:WechatIMG436.jpeg|400px]] | ||
6. pH=11 700ml distilled water + 1ml NaOH | 6. pH=11 700ml distilled water + 1ml NaOH | ||
[[File:WechatIMG427.jpeg|400px]] | [[File:WechatIMG427.jpeg|400px]] | ||
7. pH=12 250ml distilled water + 1ml NaOH | 7. pH=12 250ml distilled water + 1ml NaOH | ||
[[File:WechatIMG424.jpeg|400px]] | [[File:WechatIMG424.jpeg|400px]] | ||
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]][[File:WechatIMG430.jpeg|400px]] | ||
Revision as of 16:15, 10 January 2018
References
I use red cabbage to make pH indicator. The pH solution from 2 to 13.
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
Next step:
1. Rate of colour change
2. Reversibility of colour change