CH32 – Titration Curves

your graph will NOT look like this

Dates

• P1 – Wednesday, April 5th
• P3 – Thursday, April 6th
• P5 – Tuesday, April 4th

Class Activity – Overview

• definition of titration curve
• determine the pH at various points of the titration
• plot graph: x = volume base added (mL), y = pH of solution
• show all work on separate sheets
• for common calculations, may show one type and then summarize
• OK to use spreadsheet but make sure results written on paper

Class Activity – Details

• 0.0783-M NaOH is the titrant
• 0.0844-M HCl is being titrated
• Total Volume of acid at the start = 20.00 mL
• determine the pH of the starting acid solution
• plot graph: x = volume base added (mL), y = pH of solution

Trials – Volume of Base added

• [1-5] = 5.00 mL
• [6-10] = 0.25 mL
• [11-15] = 0.10 mL
• [16-20] = 0.25 mL
• [21-25] = 5.00 mL

Graph Questions (to answer neatly and completely)

• what does the shape indicate?
• how do I know whne the equivalence point is?
• how does volume impact pH as the titration continues?
• what factors impact the shape of the graph?
• 15.4 <it’s a thing>

Homework

• finish all calculations and graph results
• all students should have own copy of supporting work and table
• be ready to hand in paper copy of work
• one graph per group

This is cool

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