PRE-LAB QUESTIONS 1. What does it mean to say that an acid is a strong acid? How

Question

PRE-LAB QUESTIONS 1. What does it mean to say that an acid is a strong acid? How is a strong acid different from a weak acid? 2. What is the difference between an end point and an equivalence point in a titration? 3. For sulfurous acid (H,SO, a diprotic acid), write the equilibrium dissociation reactions and the corresponding expressions for the equilibrium constants, K, and K,2 4. Write the balanced neutralization reaction for sulfurous acid reacting with sodium hydroxide. 5. In a typical titration experiment a student titrates a 5.00 mL sample of formic acid (HCOOH), a monoprotic organic acid, with 26.59 mL of 0.1088 M NaOH. At this point the indicator turns pink. Calculate the # of moles of base added and the concentration of formic acid in the original sample.

Explanation / Answer

Answer:

1) A strong acid is dissociated almost completely ...it gives larger amount of H+ Per mole of the acid. It has larger degree of dissociation

   a weak acid disscoiates only partially so giving lesser amount of H+ per mole. It has smaller degree of dissociation.

So weaker acid has smaller Ka and stronger acid has larger Ka , it can be used to identfify weak from strong

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