0.250 M is the molar concentration of potassium ions in a 0.250 m K2SO4(aq) solution.
Molar concentration, also known as molarity, quantity concentration, or substance concentration, is a unit used to describe the amount of a substance in a solution expressed as a percentage of its volume.
The number of moles per liter, denoted by the unit symbol mol/L or mol/dm3 in SI units, is the most often used unit denoting molarity in chemistry.
One mol/L of a solution's concentration is referred to as one molar, or 1 M.
A chemical may or may not ionize when it is hydrated.
This means that when a substance is solvated in water, it may or may not dissociate into its cation and anion form. Only electrolytes can dissociate in water, according to the rule.
The seven powerful acids and bases—HBr, HCl, HI, HClO4, HNO3, H2SO4, LiOH, NaOH, KOH, Ca(OH)2, Sr(OH)2, and Ba(OH)2—as well as ionic compounds make up the electrolytes.
But K2SO4 is also an electrolyte because it is an ionic salt. Therefore, both of those concentrations will be equivalent to 0.250 M when it dissociates into K+ and SO42.
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