It is not a good practice to dip the pH paper into the solution to be tested.
Why?
SS1 Chem pH test easy quest.
2010-06-08 3:19 am
回答 (2)
2010-06-10 6:28 am
✔ 最佳答案
if u put the pH paper to the solution, the solution is contaminated by the substances on pH paper (that is universal indicator) if u want to carry other tests to the solution, the results may be affected by that.
it is better to dip the solution to the pH paper with a clean glass rod or a clean dropper
2010-06-08 5:59 am
The reverse is better because you donot want to contaminate the test solution . It will be used for other purposes .
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