A basic solution contains the iodide and phosphate ions that are to be separated via selective precipitation. The I– concentration, which is 8.90×10-5 M, is 10,000 times less than that of the PO43– ion at 0.890 M . A solution containing the silver(I) ion is slowly added. Answer the questions below.
Ksp of AgI is 8.30×10-17 and of Ag3PO4, 8.90×10-17.
A) Calculate the minimum Ag+ concentration required to cause precipitation of AgI.
B) Calculate the minimum Ag+ concentration required to cause precipitation of Ag3PO4.

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Burned piece of steel wool does not gain mass. so only d could be true.

Van der waals forces are temporary electromagnetic forces established between uncharged atoms. some neutral molecules, when close together, can become temporarily “charged,” as electrons move around the atom. water is a polar molecule, the side of the molecule that the hydrogens bond to being more positive, and the opposite side bound to the lone pairs of electrons being more negative. this means that it participates in dipole-dipole interaction (non-polar exhibits dispersion forces), and it has the capacity for hydrogen bonding.