HELPPP!! Generally, when I have a compound, where should I look to see if the substance is soluble or not?

The cation at the beginning of the compound

The anion at the beginning of the compound

The anion at the end of the compound

The cation at the end on the compound

The anion at the end on the compound

Explanation:

to check whether a substance is soluble or not, you would find the anion at the end of the compound on a solubility chart and then see from there whether it is soluble or not

water at room temperature is flowing through a pipe with pressure taps located 10 ft apart along one section of the pipe, which are connected to a mercury (s=13.6) manometer.