Chm621 Neutralization Rxns & Titrations

Which substance could you add to Ca(OH)₂ to neutralize it?

• O₂

• HBr

• KOH

• NaCl

Which substance would you add to HF to neutralize it?

• KOH

• HCl

• NaBr

• MgCl₂

What is the main purpose of acid-base titrations?

• To test if reactants react.

• To calculate the concentration of unknown acid or base.

• To test quality of reactants.

The following neutralization reaction occurs in the classroom.
HCl  +  KOH  -->  H₂O  +  KCl
If a student uses 25.0 mL of a 0.5M solution of KOH, what is the molarity of the acid if the is 15.0mL of acid neutralized?

• 0.8M
• 1.2M
• 12.5M

What is this piece of apparatus called

• Pipette

• Burette

• Janette

• Cuvette

What is the pH at the equivalence point.

• The pH is approximately 5

• The pH is approximately 6

• The pH is approximately 8

• The pH is approximately 9

Which of the following would be the pH at the equivalence point of the titration of

a weak acid with a strong base:

• acidic 3.9

• acidic 4.5

• neutral 7.0

• basic 8.2

What is the molarity of a 30 mL HCl which is neutralized by 48 mL of 0.1 M NaOH?

HCl + NaOH --> H₂O + NaCl

• 0.16 M

• 6.25 M

• 0.063 M

What are some things we will need for a titration?

• A solution of known concnetration

• A burette

• indicator

• mass balance

• a bunsen burner

If it takes 54 mL of 0.1 M NaOH to neutralize 125 mL of an HCl solution, what is the concentration of the HCl? (record you answer with the correct unit)

• 0.043 M

• 0.034 M

• 0.065 M

• 0.77 M