Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
You need to create a dilute hydrobromic acid solution.?
You add 30.00 mL of a 0.30 M solution to a 100 mL volumetric flask and then fill the flask with water to the 100 mL mark. What is the resulting concentration of hydrobromic acid in molarity?
Please show the steps so I know how to do it, thank you!
1 Answer
- 6 years ago
Molarity (M) = moles/liters
If you have 30.00mL of 0.30 M of HBr (Hydrobromic acid) you can solve for moles by rearranging the above equation:
first, convert 30.00 mL to Liters: 30.00 mL/1000 = .0300 L
then: moles = Molarity * liters so moles = .30 M * .0300 L = .009 moles HBr
then using the same equation you can find the resulting molarity using the total volume of the solution (total volume of solution is 100 mL because you fill the flask to the 100 mL line)
first, convert 100 mL to liters
100 mL / 1000 = .100 liters
then, plug in to the molarity equation
M = mols/liter
M = .009 mol HBr / .100 liters
M = 0.09 M
The resulting concentration of hydrobromic acid in molarity is 0.09 M