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Choose the chemical reaction that best describes the precipitation of the solid mineral gypsum (CaSO 4 2H 2 O (s) ). Question 1 options: CaSO

    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)/(CaSOH2O)

    Keq = (Ca2+)(SO42-)(H2O)

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