Universal Indicator pH Paper: I found this method less reliable than the universal indicator solution to determine the pH of the solutions. I was able to correctly identify the solutions; however, I did find that distinguishing the strong base (blue) from the weak base (blue-green) from neutral to be more challenging. When the pH paper was wet, the strong base and weak base appeared nearly identical (blue), but I was able to assign all the others. When the papers dried, the strong base pH paper remained blue and then the weak base appeared more of a light yellow-green, more similar to the yellow colour of the neutral. Ultimately, though, I was able to independently determine the correct result without re-testing.