What kind of Unknown A solution as electrolyte?

• Weak electrolyte
• Strong electrolyte
• Non-electrolyte

What kind of Unknown B solution as electrolyte?

• Weak electrolyte
• Strong electrolyte
• Non-electrolyte

What kind of titrant(s) is/are in your experiment?

• Base(s)
• Acid(s)

What kind of titrand(s) is/are in your experiment?

• Base(s)
• Acid(s)

Which indicators are the basically used for Unknown A solution and NaOH 1.0 M titration experiment?

• Thymol blue
• Phenolphthalein
• Methyl red
• Methyl orange

Which indicators are the basically used for Unknown B solution and NaOH 1.0 M titration experiment?

• Thymol blue
• Phenolphthalein
• Methyl red
• Methyl orange

What is titration error of this result? End point at pH=7, 20.00 mL (In1) End point at pH=10, 40.00 mL (In2) Equivalent point at pH=9, 35.00 mL

• Titration error of In2 is 1
• Titration error of In1 is 2
• Titration error of In2 is 10
• Titration error of In1 is 20

Which experiment has equivalent point on titration graph

• Unknown A and Unknown B
• Unknown A and NaOH
• Unknown B and NaOH
• NaOH and Deionized water (DI water)

The results of titration graphs between Unknown A and NaOH 1.0 M (defined L1 S curve) and, Unknown B and NaOH 1.0 M (defined L2 S curve) are stacked together. L2 line will align on top of L1 curve.

The results of titration graphs between Unknown A and NaOH 1.0 M (defined L1 S curve) and, Unknown B and NaOH 1.0 M (defined L2 S curve), Only L2 line has mid point.

The results of titration graphs between Unknown A and NaOH 1.0 M (defined L1 S curve) and, Unknown B and NaOH 1.0 M (defined L2 S curve), L1 line has not delicate S curve.

If Instructor want you to predict Unknown B solution, What is Unknown B? please answer with acid or base name or correct formula.

• Ethanoic acid

• Acetic acid

• CH3COOH

• C2H4O2

• C2O2H4