which of the following is soluble in water at 25c?

please, explain why it is anwer or not for each choices. thank you so much.

a. Fe3(PO4)2

b. Fe(OH)2

c. FeCO3

d. Fe(NO3)2

e. FeS

2 Answers

  • You must look up the solubility product constant (Ksp) values for each of the compounds. If they have values for Ksp they are insoluble

    a) Fe3(PO4)2 : Ksp = 1 x 10^-36 (Insoluble)

    b) Fe(OH)2 : Ksp = 7.9 x 10^-16 (Insoluble)

    c) FeCO3 : Ksp = 2.1 x 10^-11 (Insoluble)

    d) Fe(NO3)2 : Does not have Ksp value (Soluble – As a general rule all nitrate (NO3) salts are soluble in water)

    e) FeS : Ksp = 8 x 10^-19 (Insoluble)

  • Is Feco3 Soluble In Water

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