Answer :
Ksp= 2.356*10^-4 is more soluble in water.
What is called compound?
- In chemistry, a compound is a substance made up of two or more different chemical elements combined in a fixed ratio.
- When the elements come together, they react with each other and form chemical bonds that are difficult to break.
- These bonds form as a result of sharing or exchanging electrons between atoms.
The equation for dissociation of CaSO4 in water is,
CaSO4 (aq) ---> Ca2+(aq) + SO42-(aq)
Ksp = [Ca2+] [SO42-]
Let their concentration be S (molarity)
Ksp = S*S = S^2, where S is the solubility of CaSO4
Mass of CaSO4 = 0.209 g
Moles of CaSO4 = mass/ molar mass = 0.209/136.14 = 1.535*10^-3 moles
S = 1.535*10^-3g/100mL = 1.535*10^-2
Ksp = (1.535*10^-2)^2 = 2.356*10^-4
Ksp= 2.356*10^-4
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