I think i might help although i did terrible for my titration prac test ><
The reason u have to wash with distilled water first is to eliminate any substances that might contaminate ur solution later. U have to re-rinse with the solution that will go into it later abt 3 times to make sure every...
for me it's my best topic i guess. When i read the questions, i try to write any equal angles, any equal sides, like mark all the special feature i can find in the diagram. Re- draw the diagram bigger if u think that will make thing better. assume all possible lines that should be drawn to help...