Titration and Reaction Rates Quiz

What is the purpose of standardization in titration?

• To determine the molarity of an unknown solution

• To change the color of the solution

• To dissolve the solute in the solvent

• To increase the temperature of the reaction

• To speed up the reaction

What indicator is used in the standardization of NaOH and HCl?

• Methyl orange

• Bromothymol blue

• Phenolphthalein

• Litmus

• Universal indicator

What is the chemical formula of Potassium Hydrogen Phthalate (KHP)?

• C8H5KO4

• K2HPO4

• HCl

• NaOH

• C6H8O7

What is the molar mass of KHP?

• 150.2 g/mol

• 204.2 g/mol

• 180.2 g/mol

• 98.1 g/mol

• 250.3 g/mol

Why is it necessary to boil distilled water when preparing a NaOH solution?

• To sterilize the water

• To remove dissolved CO₂

• To increase solubility of NaOH

• To make the solution neutral

• To remove impurities

What is the stoichiometric ratio of NaOH to KHP in a standardization reaction?

• 1:2

• 2:1

• 1:1

• 1:3

• 3:1

In a titration, what is the point at which the reaction is complete called?

• The initial point

• The equivalence point

• The standardization point

• The dilution point

• The reaction end

Why is phenolphthalein a suitable indicator for NaOH standardization?

• It changes color at a pH of 4

• It changes color at a pH of 7

• It changes color at a pH of 8-10

• It remains colorless in all solutions

• It reacts with NaOH to form a complex

What is the primary purpose of a burette in titration?

• To store the analyte

• To measure pH changes

• To deliver precise volumes of titrant

• To heat the solution

• To remove excess reactants

When preparing a 0.100 M NaOH solution, why must the NaOH pellets be weighed accurately?

• To prevent side reactions

• To ensure correct molarity

• To increase solubility

• To change the reaction endpoint

• To decrease the reaction rate