1) The end point (or equivalence point ) of your acid (HCl) and base NaOH titrat

Question

1) The end point (or equivalence point ) of your acid (HCl) and base NaOH titration occurred when

A) The acid and the base neutralized each other

B) The number of moles of H+ = the number of moles of OH-

C) The indicator turned a different color

D) Both A and B

E) A, B and C are correct

A titration was carried out to find the concentration of an unknown base (NaOH) with a known concentration of HCl. Use the following data to answer 2, 3 and 4 questions Concentration of HCl = 0.35 M Volume of HCl dispensed from the buret = 24.35 mL Volume of NaOH added into the beaker = 36.44 mL

2) Calculate the HCl moles dispensed during the titration

A) 8.5 moles

B) 0.14 moles

C) 0.0069 moles

D) 0.0085 moles

E) 1 mole

3) Calculate the # of moles of NaOH in 36.44 mL.

A) 12.8 moles

B) 0.013 M

C) 0.0096 moles

D) 0.0085 moles

E) 1 mole

4) Calculate the molarity of NaOH

A) 0.23 M

B) 0.35 M

C) 0.53 M

D) 1.9 M

E) 1.0 M

5) Polyprotic acids have how many ionizable hydrogen ions?

A) 1

B) More than 1

C) None

Explanation / Answer

1) D

2) D

3) D

4) A

5) B

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