Practice Problem: Titration Calculations

The video tutorial explains how to perform titration calculations using an acid-base reaction between hydrochloric acid (HCL) and sodium hydroxide (NaOH). It begins with a problem statement involving an unknown concentration of HCL titrated with a known concentration of NaOH. The tutorial covers the concept of the equivalence point, where moles of acid equal moles of base, and demonstrates how to calculate the moles of base used. It then uses stoichiometry to determine the moles of acid and finally calculates the concentration of the HCL solution.

What is the main chemical reaction involved in the titration problem discussed?

• Hydrochloric acid reacting with sodium hydroxide

• Acetic acid reacting with ammonia

• Sulfuric acid reacting with potassium hydroxide

• Nitric acid reacting with calcium carbonate

At the equivalence point in a titration, what is true about the moles of acid and base?

• Moles of acid are unrelated to moles of base

• Moles of acid are double the moles of base

• Moles of base are half the moles of acid

• Moles of acid equal moles of base

How many milliliters of sodium hydroxide were used to reach the equivalence point?

• 40.0 mL

• 25.0 mL

• 35.23 mL

• 50.0 mL

What is the stoichiometric ratio between hydrochloric acid and sodium hydroxide in the reaction?

• 1:2

• 1:1

• 2:1

• 3:1

What was the calculated concentration of the unknown HCl solution?

• 0.150 M

• 0.250 M

• 0.176 M

• 0.200 M