At what pH value does the blue litmus paper change from blue to red?
We have tested the blue litmus with multiple pH buffers. The blue paper is blue at pH 8. At pH 7, the sample is maybe just a little red. The real change to red seems [...]
Can I test the pH of my body with litmus papers?
No. Litmus papers are qualitative strips, meaning they employ a color change, not a specific color chart, to indicate whether a water sample is acidic, basic or neutral. The specific pH value is not determined.