Respuesta :

Answer:

3.04 M

Explanation:

Dilution is the process of decreasing the concentration of a solute in a solution, usually simply by mixing with more solvent like adding more water to a solution. To dilute a solution means to add more solvent without the addition of more solute.

When a solution of given molarity  and volume is diluted its new concentration can be found using the formulae :

[tex]C_{new} \times V_{new} =C_{old} \times V_{old} .[/tex]

in the given problem [tex]V_{new} =25mL\\C_{old}=4 M\\v_{old}=19mL\\[/tex]

so upon substituting thse values in the above equation we get our resulting concentration to be 3.04 M

dsdrajlin

The concentration of a dextrose solution prepared by diluting 19 mL of a 4.0 M dextrose solution to 25 mL is 3.0 M.

We have 19 mL (V₁) of a 4.0 M (C₁) dextrose solution and we add water to obtain a 25 mL (V₂) of a dilute solution.

We can calculate the concentration of the diluted solution (C₂) using the dilution rule.

[tex]C_1 \times V_1 = C_2 \times V_2\\\\C_2 = \frac{C_1 \times V_1}{V_2} = \frac{4.0 M \times 19mL}{25mL} = 3.0 M[/tex]

The concentration of a dextrose solution prepared by diluting 19 mL of a 4.0 M dextrose solution to 25 mL is 3.0 M.

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