In this worksheet, we will practice describing the correct method for volumetric titrations, calculating concentrations and troubleshooting errors.
During a titration, which of the following actions would improve the accuracy of the measurement?
- AFilling the buret to the highest graduation mark.
- BRinsing the inside of the analyte flask with additional solvent before each addition of titrant.
- CSwirling a basic analyte solution for longer after each addition of acid titrant.
- DMixing the solution with a glass rod after each addition of titrant.
- EAdding five more drops of indicator to the analyte.
Which of the following quantities does not need to be accurately measured during a titration?
- ADensity of the titrant
- BInitial buret reading
- CTitrant concentration
- DFinal buret reading
When performing a titration, in which item of glassware is the analyte usually placed?
- AVolumetric flask
- CVolumetric pipet
- DRound-bottom flask
- EErlenmeyer flask
When performing a titration, in which item of glassware are stock solutions prepared?
- ARound-bottom flask
- BErlenmeyer flask
- CVolumetric flask
- DVolumetric pipette
When performing a titration, in which item of glassware is the titrant placed?
- AErlenmeyer flask
- BRound-bottom flask
- CVolumetric pipette
- EVolumetric flask
A student performs a titration, pouring one liquid into the buret from a beaker and pipetting a second liquid into the Erlenmeyer flask, as shown.
What name is given to the liquid poured into the buret?
What name is given to the liquid pipetted into the Erlenmeyer flask?
What name is given to the liquid already present in the Erlenmeyer flask?
In what way has the apparatus been incorrectly assembled?
- AThe Erlenmeyer flask has not been clamped.
- BThe buret tap is open.
- CThe liquid in the Erlenmeyer flask should be stirred using a stir bar.
- DThe funnel in the buret is too long, preventing the buret from being completely filled.
- ELiquid should be added to the Erlenmeyer flask using a volumetric pipet.