What laboratory equipment do you use to measure solid? And what are the base units for a solid?

Using a value of ksp = 1.8 x 10-2 for the reaction pbcl2 pb+2(aq) + 2cl -(aq). if the value of ksp was determined to be only 1.2 x 10-2: too much solid has dissolved. additional precipitate is forming. the solution is unsaturated. the ions are now combining to reduce their concentrations.

How does the principle of electromagnetism explain the interaction between earth’s magnetic field and the solar wind?

How do you identify the anode on a power source such as a battery? how do you identify the cathode? how are terms anion and cation?