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Title: How do I dilute 98% sulfuric acid to a 1.0 molar solution? Post by: o2blea on May 9, 2013 I have 98% sulfuric acid (as much as we want) and my lab teacher wants us to dilute it to a 1.0 molar solution with our final volume being 1 Liter. We don't have to really do this in lab but it's a take home final question we have to answer and show all our steps and explain it in lab terms. I'm stuck on figuring out how to calculate the 98% into my molarity calculations.
Title: How do I dilute 98% sulfuric acid to a 1.0 molar solution? Post by: RIL_SCO on May 9, 2013 H2SO4= 98.08 g/mole
98.08 g/.98(98%) = 100.08 g required Title: How do I dilute 98% sulfuric acid to a 1.0 molar solution? Post by: smiley77 on May 9, 2013 Concentrated sulfuric acid (98%) is 18.4 Molar.
Sulfuric acid has a M.W. of 98, density of 1.84 g/mL You can double check your answer by clicking on the link I have provided, but if you don't try first, you won't learn anything. And, of course, you add the acid to the water, not the other way around. Title: How do I dilute 98% sulfuric acid to a 1.0 molar solution? Post by: leemac on May 9, 2013 1) The mass of 1 mole of sulfuric acid (H2SO4) is 2(1) + 1(32) + 4(16) = 98 g
2) Find the mass of the concentrated sulfuric acid that contains 98 g of H2SO4. 100g of the concentrated acid is 98% sulfuric acid or contains 0.98 (100) = 98 g 3) Place a clean dry 250 ml beaker on a measuring balance and slowly pour the concentrated acid into the beaker until you have 100 g of concentrated acid. If you overshoot the mass, use an eyedropper to remove the excess. 4) Using a clean dry 1.0L volumetric flask, pour about 600 ml of distilled water into it, SLOWLY pour the concentrated acid into the 600ml of distilled water SWIRLING the flask all the time to distribute the heat formed by the solution process. 5) Pour 100 ml of distilled water into the 250 ml beaker to rinse out the remaining acid and add this to the volumetric flask. Repeat one more time and then add enough distilled water to bring the total volume to 1.0L 6) Cool to room temperature and add more distilled water to make up 1.0L |