Warm-Up Get out your pH Practice What is the pH of a solution that is made from 43.7 g of HClO4 in 4.70 L of solution?

Neutralization

Neutralization Reactions Acid (aq) + Base (aq)  Salt (aq) + H2O (l) Water is always formed Salt is an ionic compound formed from the other parts of the acid and base

Titration Titration is a lab technique used to determine the concentration of an acid or base Equivalence point is when the number of moles of H+ ions equals the number of moles of OH- ions in solution End point is when the indicator changes colors

Titration Curves Equivalence point is equal to 7 for strong acid + strong base.

Titration Curves Equivalence point is less than 7 for strong acid + weak base Equivalence point is greater than 7 for weak acid + strong base

Steps for Titration A measured volume of an analyte (usually acid) solution of unknown concentration is placed in an Erlenmeyer flask A few drops of indicator are added to the flask A measured volume of a titrant (usually base) of known concentration is placed in a buret and slowly added to the acid until the indicator changes color analyte= substance that is being identified or measured

Calculating Neutralization This is a 3-step process. Volumes must be converted to liters! Calculate the moles of titrant added to the Erlenmeyer flask (moles = M x V) Use mole ratios from the balanced equation to calculate the moles of analyte. Calculate the concentration of the analyte using the molarity equation.

Practice Titrant= Analyte= Solutions of sodium hydroxide are used to unclog drains. A 43.0 mL volume of NaOH was titrated with 32.0 mL of 0.100 M HCl. What is the molarity of the sodium hydroxide solution? Mtitrant = moltitrant = Vtitrant = Manalyte = molanalyte = Vanalyte =

Practice Titrant= Analyte= A volume of 25.0 mL of 0.120 M HBr neutralizes 40.0 mL of a NaOH solution. What is the concentration of the NaOH solution? Mtitrant = moltitrant = Vtitrant = Manalyte = molanalyte = Vanalyte =

Warm-Up Pick up papers from your folders. Make sure you keep papers to study for Friday’s test! Get out your Neutralization Notes Today we will be going over the Titrations Practice.

Titration Practice #5 Titrant= Analyte= Sr(OH)2 + 2HClO3  2 H2O + Sr(ClO3)2 Mtitrant = moltitrant = Vtitrant = Manalyte = molanalyte = Vanalyte =

Solution Stoichiometry