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pH value problem!

2016-07-20View Original

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I would like to ask: when using 10% hydrochloric acid to adjust the pH value in production, what volume of 10% hydrochloric acid is needed to increase the solution’s pH value by 0.1 units? Solution volume V.
Reply #22016-08-07
pH is the logarithm of hydrogen ions; you can calculate it yourself – find out what the change corresponding to 10 to the power of 0.1 is, as this affects concentration changes
Reply #32016-08-17
This post was last edited by qugd on 2016-8-17 at 16:25. This cannot be calculated directly based on pH, as the amount of acid required for buffer systems differs significantly from that needed for non-buffer systems. Moreover, there is also a significant difference between the initial pH levels and the amount of acid consumed. Even without a buffering system, the amount of acid required to adjust from pH 2 to pH 1 is nearly 100 times greater than that needed to adjust from pH 4 to pH 3. Furthermore, you mentioned using hydrochloric acid to raise the pH by 0.1; with current technology, this is something that is absolutely impossible to achieve, as adding acid can only lower the pH value, never raise it.

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