ASVAB Physical Science 3.1. Solution A has a pH of 3, while Solution B has a pH of 8. Solution A is what?
|ASVAB||ASVAB Physical Science|
|ASVAB Science||Physical Science|
And here are the potential answers.
[ mumbles ]
All right. Well, this is asking, uh,
what is a pH? Hmm? And how do you spell it?
Well, first, it's a measure of acidity
and, second, it's also kind of weird.
The pH scale runs from zero to 14.
The lower the number, the more acidic the substance is.
The higher the number, the more base it is.
If a substance has a pH of seven, like
plain water does, well, it means it's completely neutral.
Why couldn't the scale be one through ten or one through 20 or something simple? Hmm?
Well, sometimes scientists just like to make things confusing.
Consider it a perk of the job.
Well, here's one last tidbit of info before we get to the solution
or, uh, answer. We already have the solution.
See what we did there?
A lower pH means the solution has a higher concentration
of H+ ions.
And a higher concentration of H+ ions
means the solution is more acidic.
Now, onto the answer.
If the solution A has a pH of three, it's acidic.
That alone is enough to eliminate options C and D. Good-bye.
And if solution B has a pH of eight, we know it's
basic. Because a pH of greater than seven is, well, basic.
So solution A is acidic and solution B is basic.
The correct answer is option B.
Acids and bases and bears, oh, my!
[ chuckles ] [ music ]