Question

If you are titrating solutions of equal molarity, how do you choose an indicator? If you...

If you are titrating solutions of equal molarity, how do you choose an indicator? If you are titrating a weak acid with a strong base, like 0.1M HF with 0.1M NaOH, what calculations would you perform? Same question for strong acid with strong base, 0.1M HBr with 0.1M NaOH.

What would you do differently if it were a weak base with a strong acid or strong base with strong acid?

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Homework Answers

Answer #1

Choice of indicator does not depend on molarity. It depends on what type of acid and base you are titrating.

for a weak acid - strong base titration choice of indicatior in phenophthalein

strong acid- strong base : any indicator like bromothymol blue

strong acid -weak base : methyl orange

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for titration of weak acid -strong base and vice versa , Hinderson hasselbalch eqn pH= pka + log[salt/acid] should be used. As these two will form a buffer

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for titration of strong acid vs strong base simple M1V1 = M2V2 formula will work

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