Problem: Which one of the following is not true concerning 2.00 L of 0.100 M solution of Ca3(PO4)2?A) This solution contains 0.200 mol of Ca3(PO4)2. B) This solution contains 0.800 mol of oxygen atoms. C) 1.00 L of this solution is required to furnish 0.300 mol of Ca2+ ions. D) There are 6.02 x 1022 phosphorus atoms in 500.0 mL of this solution. E) This solution contains 0.600 mol of Ca2+.

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FREE Expert Solution

Molarity (M)=moles soluteL solution

solute → Ca3(PO4)2 

 

Ca3(PO4)2 → 3 Ca2+ + 2 PO43-


A) This solution contains 0.200 mol of Ca3(PO4)2

moles Ca3(PO4)2=2.00 L×0.100 mol Ca3(PO4)2L

moles Ca3(PO4)2 = 0.200 mol Ca3(PO4)2


The statement is TRUE.


B) This solution contains 0.800 mol of oxygen atoms. 

moles O atoms=2.00 L×0.100 mol Ca3(PO4)2L×8 mol O atoms1 mol Ca3(PO4)2

moles oxygen atoms = 1.600 mol O atoms


The statement is FALSE.


C) 1.00 L of this solution is required to furnish 0.300 mol of Ca2+ ions. 

moles Ca2+=1.00 L×0.100 mol Ca3(PO4)2L×3 mol Ca2+1 mol Ca3(PO4)2

moles Ca2+ = 0.300 mol Ca2+


The statement is TRUE.


D) There are 6.02 x 1022 phosphorus atoms in 500.0 mL of this solution. 

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Problem Details

Which one of the following is not true concerning 2.00 L of 0.100 M solution of Ca3(PO4)2?

A) This solution contains 0.200 mol of Ca3(PO4)2

B) This solution contains 0.800 mol of oxygen atoms. 

C) 1.00 L of this solution is required to furnish 0.300 mol of Ca2+ ions. 

D) There are 6.02 x 1022 phosphorus atoms in 500.0 mL of this solution. 

E) This solution contains 0.600 mol of Ca2+.

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