View the step-by-step solution to:

thomas (tt9669) - Post-Lab 5 Acid/Base Titration - lyon - (51730) This print-out should have 25 questions. Multiple-choice questions may continue on

Can you answer 5,6,8,10,12,23,24? THank You
thomas (tt9669) – Post-Lab 5 Acid/Base Titration – lyon – (51730) 1 This print-out should have 25 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 10.0 points What acid and what base would you choose to prepare the salt potassium perchlorate (KClO 4 )? 1. HK and ClO 4 OH 2. KOH and H 2 ClO 4 3. HClO 4 and KOH 4. K(OH) 2 and HClO 4 002 10.0 points What is the equation For the neutralization oF KOH with HNO 3 ? 1. KOH + HNO 3 HNO 3 + OH + H 2 2. KOH + HNO 3 KOH + NO 3 + H 2 3. KOH + HNO 3 KNOH + HO 3 4. KOH + HNO 3 KNO 3 + H 2 O 003 10.0 points The pH oF a solution oF hydrochloric acid is 2.80. What is the molarity oF the acid? 1. 6 . 3 × 10 2 M 2. 4 . 2 × 10 3 M 3. 1 . 6 × 10 3 M 4. 6 . 3 × 10 3 M 5. 4 . 2 × 10 2 M 004 10.0 points Assume that a couple oF drops oF phenolph- thalein will be added to the acid sample beFore the titration is perFormed. Assume you will titrate a sample oF sulFuric acid solution oF an unknown concentration with sodium hydroxide. All oF the Following apply except: 1. An indicator will be used. 2. Ideally, the end point will equal or come very close to the equivalence point. 3. The volume oF sodium hydroxide solution added will be careFully measured. 4. The titration depends on the volume oF water added to the sulFuric acid sample. 5. The molarity oF the sodium hydroxide must be known initially. 005 10.0 points Answer the Following question to at least 6 sig fgs. The pH oF a solution is determined to be 4 . 56. What is the hydronium ion concentra- tion oF this solution? Answer in units oF M 006 10.0 points Which acid or base is INCORRECTLY iden- tifed as to type oF compound? 1. H±; weak acid 2. Ca(OH) 2 ; weak base 3. HClO 3 ; strong acid 4. CsOH; strong base 5. H 3 PO 2 ; weak acid 007 10.0 points What is the main objective oF Part 1 oF the experimental procedure? What is the purpose oF using KHP in this part oF the experiment? 1. The main purpose oF Part 1 is to gain practice doing titrations beFore we titrate our unknown acid in Part 2. KHP is used in Part 1 because we don’t want to use up our
Background image of page 1
thomas (tt9669) – Post-Lab 5 Acid/Base Titration – lyon – (51730) 2 unknown acid during the practice titrations, and KHP is an inexpensive alternative to a real acid. 2. The main objective of Part 1 is to make sure all the students are paying attention to standard laboratory safety practices be- fore they receive a vial of acid to work with. KHP is used in Part 1 because it poses no health hazard to students who don’t know what they’re doing. 3. The main objective of Part 1 is to deter- mine the concentration of the NaOH solution as accurately and precisely as possible. KHP is used as a titration standard because it is very pure, and can therefore yield highly ac- curate results for the NaOH concentration. 4. The main objective of Part 1 is to verify the color change of the phenolphthalein at the endpoint of the titration, since we will be relying on phenolphthalein in Part 2 and don’t want to use it without veriFcation. KHP is used because it is colorless when dissolved in water, and therefore does not interfere with the color change of the phenolphthalein. 5. The main objective of Part 1 is to con- dition the phenolphthalein before using it in Part 2. KHP is used in Part 1 because the phthalate in potassium hydrogen phthalate reacts with the phthalein in phenolphthalein to create the pink color that we will need for the unknown acid titration in Part 2. 6. The main objective Part 1 is to determine the purity of the NaOH solution. We can determine the percent purity of the NaOH solution by taking a mole ratio of NaOH to KHP. 008 10.0 points Answer the question to at least six signiFcant Fgures. A solution of sodium hydroxide is standard- ized against potassium hydrogen phthalate (KHP, formula weight 204.2 g/mol). ±rom the following data, calculate the molarity of the NaOH solution: mass of KHP 2 . 254 g; buret reading before titration 0 . 13 mL; buret reading after titration 48 . 57 mL. Answer in units of M 009 10.0 points An aqueous solution is known to have a pH of 5.30 at 25 C. What is the concentration of OH in the solution? 1. 5 . 01 × 10 8 M 2. 5 . 01 × 10 6 M 3. 1.89 M 4. 8.70 M 5. 2 . 00 × 10 9 M 6. 1 . 00 × 10 2 M 010 10.0 points One of the possible responses to the question below has an incorrect formula. Please change the formula for cesium bromide to CsBr. Which salt is not derived from a strong acid and a strong soluble base? 1. LiClO 4 2. NaI 3. CsBr 2 4. Ba(NO 3 ) 2 5. MgCl 2 011 10.0 points Answer the following question to at least 6 sig Fgs. Calculate the volume of 1.65 M sulfuric acid in milliliters that is required to com- pletely neutralize 50.00 ml of 0.755 M sodium hydroxide. Answer in units of mL 012 10.0 points
Background image of page 2
Show entire document
Sign up to view the entire interaction

Top Answer

10) answer is 4) as the Ba(NO3)2 is the combination of Ba(OH)2 and... View the full answer

Sign up to view the full answer

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

-

Educational Resources
  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question
Ask a homework question - tutors are online