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sertanlavr [38]
3 years ago
5

Suppose you have already compared the pH values of two substances using 0-14 paper. When would a follow-up test using 4.5-7.5 pa

per be most helpful?
Biology
2 answers:
BigorU [14]3 years ago
4 0

Answer:

When both substances had a pH value of about 6 on the 0-14 paper  

Explanation:

The other options contemplate the case in which both substances had a pH of 3 or a pH of 9. These options are incorrect because there are outside the range of the 4.5-7.5 paper.

Another option stated that one substance has a pH of 5 and the other one a pH of 7. These values are far enough to be distinguished with the 0-14 paper.

Finally, when both substances had a pH value of about 6 on the 0-14 paper a more precise comparison is needed and the 4.5-7.5 paper can be used.

anygoal [31]3 years ago
3 0
<span>when both substances had a pH value of about 6 on the 0-14 paper</span>
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