Question

: If your pipette was wet when you started to use it, how would your results be affected, if:

a) it was wet with distilled water;

b) it was wet with NaOH;

c) it was wet with 1 M HCl;

d) it was wet with your 0.1 M HCl

Answer 1

1. If the pipette was wet with distilled water, the solution that will be taken next will be diluted, i.e, its concentration would be reduced.
2. If the pipette was wet with NaOH, the solution that will be taken next will experience an increase in pH. (provided the solution isn't already a strong base).
3. If it was wet with 1M HCl, the solution will experience a decrease in pH (provided the solution isn't already a strong acid). Since, the conc. of HCl is very high here, basic solutions can lead to exothermic neutralisation reactions with strong effervescence.
4. If it was wet with 0.1M HCl, the solution will experience a decrease in pH (provided the solution isn't already a strong acid).