Choose the chemical reaction that best describes the precipitation of the solid mineral gypsum (CaSO₄•2H₂O_(s)).

Question 1 options:

	CaSO4•2H2O(s) + SO42-(aq) ⇔ Ca2+(aq) + H2O(l)
	Ca2+(aq) + SO42-(aq) ⇔ CaSO4•2H2O(s)
	Ca2+(aq) + SO42-(aq) + H2O(l) ⇔ CaSO4•2H2O(s)
	CaSO4•2H2O(s) ⇔ Ca2+(aq) + SO42-(aq) + H2O(l)

Choose the correct equilibrium expression for the dissolution of gypsum, CaSO₄·H₂O.

Question 2 options:

	Ksp = (Ca2+)(SO42-)(H2O)
	Ksp = (Ca2+)(SO42-)2
	Ksp = 1/(Ca2+)(SO42-)
	Ksp = (Ca2+)(SO42-)/(CaSO4)(H2O)
	Ksp = (Ca2+)(SO42-)
	Ksp = (CaSO4)(H2O)/(Ca2+)(SO42-)

Choose the correct equilibrium expression for the precipitation of gypsum, CaSO₄·H₂O.

Question 3 options:

	Keq = (Ca2+)(SO42-)
	Keq = (CaSO4)(H2O)/(Ca2+)(SO42-)
	Keq = (Ca2+)2(SO42-)2
	Keq = 1/(Ca2+)(SO42-)
	Keq = (Ca2+)(SO42-)(H2O)/(CaSO4·H2O)
	Keq = (Ca2+)(SO42-)(H2O)

Answer rating: 100% (QA)

Ca 2 aq SO 42 aq Ca SO 4 2 H 2 O ... View the full answer