posted by shan .
Which on is true
A substance with ph is twice as acidic as substance with ph of 4.
A subtances with ph 3 is 10 as acidic as substance with ph of 4.
A substance with ph 3 twice as alkies as substances with ph 4.
a substancs with ph 3 10 time alkies as substance with ph 4.
it was my test question
i don't remember complete sentences.
Try some of the following links on the Ph scale for information:
i know about ph scale but still could not undersatand this question .