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Samantha added 125 mL of water to 100mL of a stock solution to make 225 mL of a 0.75 M Solution.The Concentration of the original stock solution will be __ than that of the mixed solution.

A.Greater than

B.Less than

C.Equal to

Respuesta :

Answer: A.Greater than

Explanation:

According to the neutralization law,

[tex]M_1V_1=M_2V_2[/tex]

where,

[tex]M_1[/tex] = molarity of stock  solution = ?

[tex]V_1[/tex] = volume of stock  solution = 100 ml

[tex]M_2[/tex] = molarity of dilute solution = 0.75 M

[tex]V_2[/tex] = volume of dilute solution = 225 ml

[tex]M_1\times 100=0.75\times 225[/tex]

[tex]M_1=1.7M[/tex]

Thus Concentration of the original stock solution will be greater than that of the mixed solution.

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