You have solid potassium hydroxide KOH(s) and distilled water. You want to prepare 100 ml of aqueous potassium hydroxide solution KOH(aq) with the concentration c=0.250 mol dm−3. What is the mass of solid potassium hydroxide you need for that?

idk

explanation:

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the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l