For the calculating change in pH question, some of the volumes of acid required
ID: 574236 • Letter: F
Question
For the calculating change in pH question, some of the volumes of acid required were very very small. The smallest volume that can be reasonably transferred with pipetteman is 2 microliters (2 x 106 liters) If the volume of acid that needs to be added is so small that there is no equipment available to measure and transfer the correct volume of acid, what could be done to successfully adjust the pH? O Use a less concentrated acid to adjust the pH so the required volume would be larger Use a more concentrated acid to adjust the pH so the required volume would be larger Use a less concentrated acid to adjust the pH so the required volume would be smaller Use a more concentrated acid to adjust the pH so the required volume would be smaller
Explanation / Answer
In order to calculate the change in pH, if the amount of acid required is very less which cannot be even measured by pipette whose lowest limit is 2 microlitres then in that case the best possible option is to use less concentrated acid to adjust the pH so that its volume required will be larger and easily measurable by pippete and also change in pH would not be too much and can be adjusted easily.
Instead if you use more concentrated acid, then even its small volume can bring larger deviation in pH and it would be very difficult to adjust pH in that case and in larger quantity ,it can give huge pH change which would be inappropriate to use.
Instead of this again if you use less concentrated acid with smaller amount then there would be no marginal change in pH and change in pH would not be detected easily.
Best possible option is Number 1