Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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- The glassware which contacts the KMnO4 solution (the filter, suction flask and storage bottle), should all be pre-rinsed with a 10% HCl solution, AND THEN FULLY RINSED WITH DISTILLED WATER (VERY IMPORTANT STEP!!! – WHY??arrow_forwardPhotos File Edit Image View Window Help Revert to Original Adjust Filters Crop (a) Calculate the molar concentration of all the ions in 0.40 M of aluminium sulphate. C 5 10. 5 5 0 -10. ... -5. CROP Flip Aspect Auto Mon 25 Jul 3:43 PM Ö Reset Donearrow_forward© Macmillan Learning The concentration of arsenic trioxide (As2O3) can be experimentally determined via titration with coulometrically generated iodine. To perform the analysis, solid As2O3 (MW = 197.84 g/mol) is first dissolved in an aqueous sodium bicarbonate solution, forming arsenious acid (As(OH)3) by the equilibrium shown. As2O3(s) + 3H2O(1) 2 As(OH)3(aq) The iodine is coulometrically generated by passing a constant current through the solution which contains potassium iodide (KI ). The arsenious acid in solution is then oxidized by the iodine. Once the reaction has gone to completion, excess generated iodine reacts with a starch indicator, generating a color change and signaling the titration end point. The amount of time it takes to reach the end point is used to determine the amount of As2O3 in solution. 21¯¯ = 12 + 2e¯ 12 + As(OH)3 + H2O = AsO(OH)3 + 2H+ + 21¯ An unknown amount of As2O3 was dissolved in 53.00 mL of an aqueous sodium bicarbonate solution, and to this sample,…arrow_forward
- Answer ASAParrow_forward20 E The volume of water needed to dissolve 0.0620 grams of copper(II) carbonate is Assume no volume change upon addition of the solid. Submit Answer $ 4 R % 5 [Review Topics) References) Use the References to access important values if needed for this question. Retry Entire Group 8 more group attempts remaining Cengage Learning Cengage Technical Support T A 6 MacBook Pro Y & U ▶II * 00 8 1 ( 9 ) 0 P IL. Previous Email Instructorarrow_forwardQuantity Your Data 1. Grams of vinegar sample used for your titration 25.000 g 2. Initial Buret Reading of Sodium Hydroxide solution 10.00 mL 3. Final Buret Reading of Sodium Hydroxide solution 28.00 mL 4. Amount of Sodium Hydroxide Solution used to neutralize the vinegar sample 5. Concentration of NaOH in the NaOH solution 0.050 g/mL 6. Grams of NaOH used to neutralize the vinegar 7. Grams of acetic neutralized by the amount of NaOH 8. Percent acetic acid in the vinegar Hints: For #4, The amount of NaOH used is the difference between the starting buret value and the ending buret value. For #6, Once you calculate the amount of sodium hydroxide used, multiple that value by the concentration of NaOH in the NaOH solution. For #7, Multiply the value obtained in number 6 by the number 1.5. Remember, we learned that every 1 gram of NaOH neutralizes 1.5 grams of acetic acid. For #8, Divide the grams of acetic acid by the grams of vinegar sample and multiply this value by…arrow_forward
- Hi please answer asap. What is the color of 12 solutions? Don't need to answer the table and conclusion. Only the 1st questionarrow_forwardin text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working!!!!!!!arrow_forwardGg.173.arrow_forward
- in text form with proper workings and explanation for each and every part and steps with concept and introduction no AI no copy paste remember answer must be in proper format with all working!!!!!!!arrow_forwardTrial 1 Trial 2 Trial 3 Initial burette reading (mL) 2.29 1.41 1.95 Molarity of NaOH (M) 0.100 0.100 0.100 Volume of vinegar sample (mL) 5.00 5.00 5.00 Final burette reading (mL) 50.37 49.39 49.84 Table 2. Titration data Trial 1 Trial 2 Trial 3 Initial burette reading (mL) 2.29 1.41 1.95 Molarity of NaOH (M) 0.100 0.100 0.100 Volume of vinegar sample (mL) 5.00 5.00 5.00 Final burette reading (mL) 50.37 49.39 49.84 Expected color at end point Volume of NaOH used (mL) 48.08 47.98 47.89 Compute for the ff: a. Average moles of acetic acid (mol)? b. Average molarity of acetic acid (M)? c. Average molarity of acetic acid (M)?arrow_forwardResults and Conclusion First Paragraph: First sentence matches with the first sentence of the Objective First sentence is: to identify the given ammonium salt and to determine determine its equivalent mass via acid-base titration Please calculate Average molar mass, % relative range, error, Identity of Unknown stated Second Paragraph: sources of errors discussed Please please please answer super super fast it's super importantarrow_forward
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