Choose the ksp expressions for the following reactions. ca3(po4)2(s) 3ca+2 (aq) + 2po4 -3(aq) ksp = [ca+2]2[po4-3] 2 ksp = [ca+2]3[po4-3] 3 ksp = [ca+2]3[po4-3] 2 ksp = [ca+2]2[po4-3] 3

The correct answer is Ksp=[Ca+2]3[PO4-3]

Explanation:

                            Ca3(PO4)2=3Ca+2+PO4-3

                    K=[Ca+2]3[PO4-3]/Ca3(PO4)2

                    K[Ca3(PO4)2]=[Ca+2]3[PO4-3]

                                      Ksp=[Ca+2]3[PO4-3]

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: