required practical 9: titration curve

Question 1

method of experiment

Answer 1

add acid to burette, ensuring jet is filled
transfer some acid to beaker
add alkali to second burette, ensuring jet is filled
rinse pH probe with deionised water and clamp until bulb is immersed in the acid
measure pH of the solution
add NaOH to the same beaker and stir then recored pH
add NaOH in at 2cm3 intervals

Question 2

how do you calibrate the pH probe

Answer 2

rinse pH probe with deionised water
place probe in standard pH 7 buffer solution and record pH
repeat using pH4 and pH 9
rinse pH probe between each reading

Question 3

how do you analyse the data

Answer 3

adjust readings due to calibration
plot graph
pH value on y axis
volume of NaOH on x axis
join points together
work out neutralisation point - middle of steep section