NEW
Font size
WorksheetsCHM 131 20 Acid Base Titration
Total questions: 11
Worksheet time: 23mins
What is the main purpose of acid-base titrations?
To test if reactants react.
To calculate the concentration of unknown analyte.
To calculate the concentration of known analyte.
To test quality of reactants.
What is the role of an indicator in a reaction?
To help reactants react successfully.
To bind to the analyte to form a products.
To show when the reaction has reached or past the equivalence point.
To provide a surface for the reaction to occur.
What is an equivalence point?
It is the point when enough analyte has been added.
It is the point when the amount of added titrant is equal to the amount of analyte in the solution.
It is the point when the volume of titrant is equivalent the volume of analyte.
It is the point when the concentration of titrant added is equivalent to the volume of analyte.
Which of the following indicators is the best choice for this titration?
Methyl orange (pH range of color change is 3.2 - 4.4)
Methyl red (pH range of color change is 4.8 - 6.0)
Bromothymol blue (pH range of color change is 6.1 - 7.6)
Phenolphthalein (pH range of color change is 8.2 - 10.0)
If the Erlenmeyer flask contains acidic solution and a few drops of phenolphthalein, its color will be
pink
blue
red
colorless
What color is phenolphthalein in a base?
colorless
pink
blue
green
What term describes the change in color of the indicator during a titration?
colorizing
endpoint
equivalence point
endgame
A student used a 0.125 M of sodium hydroxide solution in a titration experiment. The initial reading on the buret was 0.45 mL. After the titration, the buret reading was 14.98 mL. How many moles of sodium hydroxide was used?
1.82 moles
1.82 x 10-3 moles
8.34 x 10-3 moles
8.6 moles
How many mL of a 0.12 M NaOH solution are needed to neutralize 18 mL of 0.15 M H3PO4 solution?
3NaOH (aq) + H3PO4 (aq) ----> Na3PO4 (aq) + 3H2O (l)
7.5 mL
0.015 mL
68 mL
23 mL
