Which statement about a compound on this pH scale explains why it is the strongest acid?

A.
RbOH is a strong acid because it has the greatest pH.

B.
HCl is a strong acid because its pH is the lowest number on the pH scale.

C.
HIO3 is a strong acid because its pH is closest to 7.

D.
HBr is a strong acid because its pH is less than 7.

Question

Which statement about a compound on this pH scale explains why it is the strongest acid?
   
 A.
RbOH is a strong acid because it has the greatest pH.
 
 B.
HCl is a strong acid because its pH is the lowest number on the pH scale.
 
 C.
HIO3 is a strong acid because its pH is closest to 7.
 
 D.
HBr is a strong acid because its pH is less than 7.

anonymous · Answer

I'll be referring to the simplest definition of an acid; which is the presence of H3O in water.  The greater amount of H3O molecules, the stronger the acid.  If a solution has 1*10^-1 molecules of H3O it has alot more (actually vastly more) H3O than a solution 1*10^-14 molecules of H3O.  Chemists have agreed to not write negative exponents and instead use aPH scale which is the negative log, which means the negative log of 10^-1 = 1.  So the lower the number on the pH scale in reality has more H3O molecules which makes it more acidic.