AP Chemistry Acid-Base Titrations Lab Lesson

19.3 Titration

By Lan Vu

​What is a titration?

​a process used to determine an unknown concentration by reacting with a known concenration suing the concept of acid-base neutralization

​ACID + BASE → Water + Salt

​Theory behind the proess.

​Neutralization reaction:

acid + base → ​water and salt

​M_a Molarity (mol/L) of the acid

V_a​ Volume of the acid

M_b Molarity (mol/L) of the base

V_b Volume of the base

n number of H⁺ in the formula

m number of OH^- in the base​

​mol acid = mol base

​If it takes 54 mL of 0.1 M NaOH to neutralize 125 mL of an HCI solution, what is the concentration of the HCI?

​If it takes 54 mL of 0.1 M NaOH to neutralize 125 mL of an HCI solution, what is the concentration of the HCI?

1NaOH + 1HCl → H₂O + NaCl

​Step 1 Identifying the variables.

V_base = 54 mL

M_base = 0.1 M

V_acid= 125 mL

M_acid= ? M

Multiple Choice

What is the reading on this burette? Read the bottom of the miniscus (the curve).

• 24.0 mL

• 25.8 mL

• 24.2 mL

• 23.9 mL

Multiple Choice

30 mL of NaOH is neutralised by 12.3 mL of 0.2 M HCl. What is the concentration of the NaOH.

• 82 M

• 0.82 M

• 0.49 M

• 0.082 M

Multiple Choice

A 50.0 mL sample of Ca(OH)₂ is neutralized by 300.0 mL of HCl solution with a pH of 1.3. Calculate the molarity of the Ca(OH)₂ solution.

• 1.0 M

• 0.50 M

• 0.15 M 

• 0.30 M