What is the final acetate ion concentration when 69. g Ba(C2H3O2)2 is dissolved in enough water to make 970. mL of solution? The molar mass of Ba(C2H3O2)2 is 255.415 g/mol.

0.28 M
0.64 M
0.91 M
0.20 M
0.56 M

0.56M of acetate ions

Explanation:

Given parameters:

Mass of Ba(C₂H₃O₂)₂  = 69g

Volume of water  = 970mL  = 0.97dm³

Molar mass of Ba(C₂H₃O₂)₂ = 255.415g/mol

Unknown:

Concentration of acetate ion in the final solution = ?

Solution:

Let us represent the dissociation;

                Ba(C₂H₃O₂)₂  = Ba²⁺   + 2C₂H₃OO⁻

We see that 1M of will produce 2M of acetate ions

Now, let us find the molarity of the barium acetate;

            Molarity  =

                Number of moles of Ba(C₂H₃O₂)₂ =

                Number of moles  =  = 0.27moles

     Molarity of Ba(C₂H₃O₂)₂ =     = 0.28M

since 1M of Ba(C₂H₃O₂)₂ will produce 2M of acetate ions

        0.28M of Ba(C₂H₃O₂)₂ will produce 2 x 0.28  = 0.56M of acetate ions

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.