Lab 7pH and Liming

1
Lab 7 pH and Liming Test for free
carbonates Add HCl drop-wise and look for
effervescence (CO2 bubbles released)
2
Test for buffering Add just water Add acid Add
base Check pH The smaller the pH change, the
greater the buffering
3
You should rinse outside of electrode between
samples to reduce carryover Lightly dry sleeve
4
Determine pH after adding increasing amounts of
base This allows you to calculate the amount of
lime needed to raise pH to target level