Question

Question 1 (2 points) The relationship between a weak acid and its conjugate base at the 1/2 neutralization point is: the weak acid's concentration is greater than the conjugate base concentration. the weak acid's concentration is less than the conjugate base's concentration the weak acid's concentration is 1/2 the concentration of the conjugate base's concentration the weak acid and conjugate base have the same concentration. Question 2 (3 points) ✓ Saved The pka of acid is 4.8. Determine the acid's K, value. 1.58x104.5 Question 3 (2 points) If the total volume of titrant add to reach the 1/2 neutralization point is 5.00 mL. How many milliliters will it take to reach the equivalence point of the titration

Answer 1

Shavion I When we start neutralising a weak aid it starts being neutralised and converted into its conjugate base. s a Half neutralisation point is that when half of the and is converted into its conjugate base. The amount of conjugake base produud is equal to and neutralssed so correct statement is a o The weal and and conjugate base have same comentration. I Sanz Lien we know, Pla = a log ka . = Ka = Antilog (-pka) = Antilog (-4.8) 1058110-s. 19 Question 3 Half neutralisation means half of the and is neutralised and half is remaining - so to neutralise full amount the titrant | needed is just double than required for the half neutralist ation. So correct answer will be 10.0mL. a restion & Guffers are those which resist the change in ohon addition of and or base. If we add NEOH (a base, it will neutralise the aid and pH will remain fixed around 4.15 So correct option is - (3) The auetic acid component of the buffer will neutralise added Nooh and H will remain . oits: