The following pictures represent aqueous solutions of three acids HA (A = X,Y,or Z);water molecules have been omitted for clarity.
-Which acid solution has the lowest pH?
A)HX
B)HY
C)HZ
D)All have the same pH.

Question

The following pictures represent aqueous solutions of three acids HA (A = X,Y,or Z);water molecules have been omitted for clarity. 
-Which acid solution has the lowest pH?
A)HX 
B)HY 
C)HZ 
D)All have the same pH.

Quizplus · Accepted Answer

From the given pictures, it can be observed that HY has more H+ ions (indicated by larger number of red spheres) compared to HX and HZ. Therefore, HY is expected to have a lower pH level as pH is negatively correlated with H+ ion concentration. Thus, option B is the correct choice.

The Following Pictures Represent Aqueous Solutions of Three Acids HA