Question: The indicators listed:
mtehyl orange 3.1-4.4
bromocresol purple 5.2-6.8
Phenolphthalein 8.3-10
Choose one of the above indicators that would best indicate the endpoint of a titration of HNO2 with sodium hydroxide (NaOH). Explain?
My reasoning is this: HNO2 is a wear acid and NaOH is a strong base...if you did a titration experiment with the HNO2 solution and the NaOH as the titrant, you would get an equivalence point or pH value above 7 making it more basic (I think it would be above 8 actually but I could be wrong) and this would make phenoplphthalein a good choice? Can anyone agree, disagree, help me here???
Thanks