ALSO! If I could get help with this question as well... What is the pH of the bu

Question

ALSO! If I could get help with this question as well...

What is the pH of the buffer 0.17 M Na2HPO4 / 0.22 M KH2PO4?

Which indicators that would be suitable for each of the following titrations: CH3NH2 with HBr thymol blue bromophcnol blue methyl orange methyl red chlorophcnol blue bromothymol blue crcsol red phcnolphthalcin HN03 with NaOII thymol blue bromophcnol blue methyl orange methyl red chlorophcnol blue bromothymol blue crcsol red phcnolphthalcin IIN02 with KOII thymol blue bromophcnol blue methyl orange methyl red chlorophcnol blue bromothymol blue crcsol red phcnolphthalcin

Explanation / Answer

1. For CH3NH2 and HBr - Phenolphthalein because the pKa of methylamine is 10.64.
2. For HNO3 and NaOH - Bromothymol blue because you are looking for neutrality (pH 7) as you have strong acid and strong base.
3. For HNO2 and KOH - Methyl orange because the pKa of nitrous acid is around 3.4

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