What is the pH at the equivalence point for the titration of 0.20 M solutions of the following acids and bases? Which of the indicators in Figure 17.5 would be suitable for each titration? (c) Ba(OH)2 and HBr

Video transcript

Hello everyone today. We have the following problem for the tight rations of 0.15 molar solution of per chlorate and sodium hydroxide. What is the ph, at the equivalence point, choose a suitable indicator from the table below. So our per chlorate is a strong acid, meaning that it completely dissociates and our sodium hydroxide is a strong base. So at the equivalence point we're going to have our per chlorate reacting with our sodium hydroxide and this is going to form water, sodium ions and chlorine ions. So for the tight rations with a strong acid and a strong base, the ph at the equivalence point is always going to be equal to seven. In other words, a suitable indicator for a tight tray shin is going to be one that changes the color at the equivalence point. And so from this table here, the end point for Bruno final blue is seven, meaning it changes the color at the equivalence point and that's essentially what we're trying to find. So in other words, our answer is going to be Bruno diamond blue. And with that we've answered the question overall. I hope this helped. And until next time