Exam Review Acid Problems Updated

Exam Review Acid Problems Updated - Exam Review Acid...

Info icon This preview shows pages 1–2. Sign up to view the full content.

Exam Review Acid Problems: 1. In an acid base titration, you have 300 mL of a KOH compound, and in order to reach equivalence, you add to the KOH an unknown volume of .65M hydrochloric acid. Hydrogen chloride (HCl) is a naturally occurring gas in nature, and a sample of aqueous hydrochloric acid may be converted into gaseous HCl. If the HCl in a hydrochloric acid sample of the same volume as that added to the KOH compound is liberated into the gaseous state, it is found to occupy a volume of 2.5L at 25 degrees Celsius and at 2 atm. What is the initial KOH concentration? 2. A sample of HCl is added to excess Pb(NO 3 ) 2 . Upon completion of the reaction between the lead nitrate and the hydrochloric acid, a titration is performed on the remaining solution and it is found that 250mL of NaOH are needed to reach equivalence. After the titration, the solution is poured though a filter
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: and 78.5mg of a white solid precipitate are isolated. What is the concentration of the sodium hydroxide added in the titration. 3. If.466M H 2 SO 4 is added to KOH, and the volume of sulfuric acid added to the potassium hydroxide to reach equivalence is precisely twice the initial KOH volume, what is the KOH molarity? 4. A 8.678g sample of an unknown compound containing C, H, O, and N is combusted with excess oxygen in a 7.09L container. Once the reaction is complete, it is cooled to a temperature of 80 degrees celsius and the remaining oxygen gas is selectivey removed. After the oxygen is removed, the partial pressures of the remaning nitrogen gas (N 2 ) is .2905atm, the partial pressure of the carbon dioxide gas is 1.155atm, and finally, the partial pressure for the water vapor is 2.04atm. What is the empirical formula for the compound?...
View Full Document

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern