Please enable JavaScript.
Coggle requires JavaScript to display documents.
Lab Skills - Mind Map - Coggle Diagram
Lab Skills - Mind Map
-
Acid-Base Titrations
When both the acid and base in the titration release the same amount of OH- and H+, you can simply use the dilution equation. If they release different anmounts of hydroxide and hydronium, you can adjust the formula to fit the situation.
In neutralizations, your product is water + a salt, such as NaCl in an HCl + NaOH titration.
-
Setting up a Titration
The purpose of a titration is to quantitatively determine the concentration of an unknown solution called titrand/analyte.
Materials needed:
- Buret
- Ring stand
- Buret clamp
- pH indicator
- small funnel
- Erlenmeyer flask (better to swirl)
- Volumetric pipet
- Titrant and analyte
Steps:
- Make sure your buret is clean by rinsing it
- Feel the buret with titrant using a funnel
- Place the Erlenmeyer flas underneath the buret
- Release some of the titrant to release any stuck air and rinse the erlenmeyer flask
- Record your initial volume of titrant according to minuscus
- Use the volumetric pipet to measure an amount of analyte and transfer it to the flask
- Mix a few drops of the indicator with the analyte
- Slowly operate the buret, releasing titrant in small amounts, and swirling the erlenmeyer flask until your indicator indicates the solution has been neutralized (end point)
- Subtract the initial titrant volume from the final volume to calculate the volume of titrant added
- Perform calculations to figure out the concentration of your analyte
Mole Fraction
-
Ex.: If we have three substances, A, B, and C, the mole fraction of B will be:
number of moles of B / number of moles of A + B + C
-
-
-