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
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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)
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