Question

what volume of solution will you get if you take 50.0 ml of a 12.0 m stock solution of hbr and dilute it to 1.25 m?
o 5.21x10-3 ml
o 2.08 ml
o 300. ml
o 480. ml

Explanation:

Step1: Use the dilution formula

The dilution formula is \(C_1V_1 = C_2V_2\), where \(C_1\) is the initial concentration, \(V_1\) is the initial volume, \(C_2\) is the final concentration, and \(V_2\) is the final volume.
Given \(C_1 = 12.0\space M\), \(V_1=50.0\space mL\), \(C_2 = 1.25\space M\).
We need to find \(V_2\).
From \(C_1V_1 = C_2V_2\), we can solve for \(V_2\) as \(V_2=\frac{C_1V_1}{C_2}\).

Step2: Substitute the values into the formula

Substitute \(C_1 = 12.0\space M\), \(V_1 = 50.0\space mL\), \(C_2=1.25\space M\) into \(V_2=\frac{C_1V_1}{C_2}\).
\(V_2=\frac{12.0\space M\times50.0\space mL}{1.25\space M}\)
\(V_2=\frac{600}{1.25}\space mL\)
\(V_2 = 480\space mL\)

Answer:

480 mL