Titrations

What happens to the pH of a solution during a titration?

• The pH remains constant throughout the titration.

• The pH of the solution changes as the titrant is added, typically moving from acidic to neutral to basic.

• The pH increases rapidly and then decreases suddenly.

• The pH only changes at the endpoint of the titration.

What is the endpoint of a titration?

• The point at which the solution reaches its maximum volume.

• The point at which the indicator changes color, signaling that the reaction is complete.

• The point at which the reactants are completely mixed together.

• The point at which the temperature of the solution stabilizes.

If 25 mL of 0.05 M HCl neutralizes 34.5 mL of NaOH, how do you find the concentration of NaOH?

• Use the formula: M1V1 = M2V2, where M1 and V1 are the molarity and volume of HCl, and M2 and V2 are the molarity and volume of NaOH.

• Calculate the concentration of NaOH by dividing the volume of HCl by the volume of NaOH.

• Use the formula: M1V1 + M2V2 = 0, where M1 and V1 are the molarity and volume of HCl, and M2 and V2 are the molarity and volume of NaOH.

• Multiply the volume of HCl by its molarity to find the moles of HCl, then use that to find the concentration of NaOH.

What is neutralization in the context of titrations?

• A process where an acid and a base react to form water and a salt.

• A method to increase the acidity of a solution.

• A technique used to measure the concentration of a solution.

• A reaction that only occurs in the presence of a catalyst.

What is the pH range of acids?

• pH less than 7

• pH equal to 7

• pH greater than 7

• pH between 7 and 14

What is the pH range of bases?

• pH less than 7

• pH equal to 7

• pH greater than 7

• pH between 0 and 14

What is the purpose of an indicator in a titration?

• To measure the volume of the titrant used

• To change color at a specific pH level, signaling the endpoint of the titration.

• To increase the reaction rate of the titration

• To provide a source of heat during the reaction

What is the formula for calculating molarity (M)?

• Molarity (M) = moles of solute / liters of solution.

• Molarity (M) = liters of solution / moles of solute.

• Molarity (M) = moles of solute + liters of solution.

• Molarity (M) = moles of solute - liters of solution.

What is a strong acid?

• An acid that partially dissociates in solution.

• An acid that completely dissociates in solution, releasing all of its hydrogen ions.

• An acid that does not dissociate in solution.

• An acid that only dissociates at high temperatures.

What is a titration?

• A method to measure the volume of a liquid

• A laboratory method used to determine the concentration of a solution by reacting it with a solution of known concentration.

• A technique for separating mixtures

• A process of heating substances to change their state