How would you prepare 50.0 mL of 2.0 M H2SO4 starting with concentrated sulfuric acid (18M)?
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To prepare 50.0 mL of 2.0 M H2SO4 starting with concentrated sulfuric acid (18M), you will need to make a dilution.
To calculate the volume of concentrated sulfuric acid required, you can use the following equation:
C1V1 = C2V2
Where:
C1 = concentration of the concentrated sulfuric acid (18M)
V1 = volume of the concentrated sulfuric acid needed (unknown)
C2 = desired concentration (2.0M)
V2 = final volume (50.0 mL)
Rearranging the equation, you get:
V1 = (C2 * V2) / C1
Substituting the given values:
V1 = (2.0M * 50.0 mL) / 18M
V1 ≈ 5.56 mL
So, to prepare 50.0 mL of 2.0 M H2SO4, you would take approximately 5.56 mL of the concentrated sulfuric acid (18M) and then add water to reach the final volume of 50.0 mL.