Neutralization Reactions Acid Base Salt Water Neutralization Reactions

Neutralization Reactions: Acid + Base Salt + Water

Neutralization Reactions When an acid is added to a base, the hydrogen ion from the acid combines with the hydroxide ion from the base to form water. The cation from the base then combines with the anion from the acid to form a salt. Ex. HCl + Na. OH Na. Cl + H 20

Neutralization Reactions Can be used to determine concentrations of solutions through a process known as a titration. Equation: na Ma Va =nb Mb Vb is used to calculate the unknown concentration. › n is the mole ratio value › M is the molarity › V is the volume (from the balanced chemical equation)

Steps: Add a measured volume of the solution with the UNKNOWN concentration to a flask. 2. Add an Acid-Base indicator to the flask. 3. Fill a buret with a solution of KNOWN concentration. Record the initial volume of the buret. 4. Use the buret to add small amounts of the known solution to the flask until the unknown solution just barely changes color. 5. Measure the volume of solution added to the flask. 6. Use n M 1 V 1 =n M 2 V 2 to calculate the unknown concentration. Remember: One solution is a base, the other an acid. 1.

Virtual Titration Lab www. sasinschool. com Log in (username: northpitt) Select Science, Chemistry Select Solution Chemistry Select Acid-Base Chemistry Read instructions and complete lab Complete data sheet and answer questions.

Neutralization Practice How many m. L of a 3 M Na. OH solution are required to completely neutralize 20. 0 m. L of 1. 5 M H 2 SO 4? (Start by writing a balanced equation!) What is the molarity of a solution of Ca(OH)2 if 15. 0 m. L of the solution is required to neutralize 20. 0 m. L of 2 M HCl? What volume of 0. 25 M phosphoric acid is required to neutralize 30. 0 m. L of 0. 05 M barium hydroxide?

Titration Practice Problems How many m. L of a 3 M Na. OH solution are required to completely neutralize 20. 0 m. L of 1. 5 M H 2 SO 4? (Start by writing a balanced equation!) What is the molarity of a solution of Ca(OH)2 if 15. 0 m. L of the solution is required to neutralize 20. 0 m. L of 2 M HCl? What volume of 0. 25 M phosphoric acid is required to neutralize 30. 0 m. L of 0. 05 M barium hydroxide?