1. When, a volume of 200 cm³ of Lithium hydroxide solution of concentration 1.00 mol/dm3 and 200 cm of Hydrochloric acid of concentration 100 mol/dm3 were mixed together in a calorimeter the reaction was investigated to be exothermic. a) Distinguish between endothermic and exothermic reactions. b) Based on the information given above in question one (1), calculated the enthalpy change per mol of water produced, if the heat capacity of the calorimeter was 76 J/K and the temperature rise was 5.25 K. (State any assumptions made)

1. When, a volume of 200 cm³ of Lithium hydroxide solution of concentration 1.00 mol/dm3 and 200 cm of Hydrochloric acid of concentration 100 mol/dm3 were mixed together in a calorimeter the reaction was investigated to be exothermic. a) Distinguish between endothermic and exothermic reactions. b) Based on the information given above in question one (1), calculated the enthalpy change per mol of water produced, if the heat capacity of the calorimeter was 76 J/K and the temperature rise was 5.25 K. (State any assumptions made)

Introductory Chemistry: An Active Learning Approach

6th Edition

ISBN:9781305079250

Author:Mark S. Cracolice, Ed Peters

Publisher:Mark S. Cracolice, Ed Peters

Chapter16: Solutions

Section: Chapter Questions

Problem 4CLE

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Other information not on photo 2 gram potassium bitartrate are put into a 250ml flask. 150ml water is added. The solution is stirred and left to settle. the solution if filtered through a dry funnel into a 250ml breaker. 25ml of this solution was placed into 4 different flasks each. Approximately 11.5666667ml of NaOH was added to each flask. What is the concentration of the HC4H4O6-? (Asked on the right side of the table)
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Suppose, in an experiment to determine the amount of sodium hypochlorite in bleach, you titrated a 26.34 mL sample of 0.0100 M KIO3 with a solution of Na2S2O3 of unknown concentration. The endpoint was observed to occur at 15.51 mL. How many moles of KIO3 were titrated? Type answer:
ghing out an accurate amount of solid sodium hydroxide and dissolving it in a known volume of water? 5. If magnesium hydroxide were used instead of NaOH, how many moles would it take to combine with three moles of KHP? Explain. 6. A 0.4622-g sample of potassium hydrogen phthalate was dissolved in 50 mL of deionized water and titrated to a phenolphthalein end-point with 19.48 mL of NaOH solution. What is the molarity of the NaOH? o 7. Assuming that the density of vinegar is 1.012 g/mL, calculate the weight percent of acetic acid in vinegar if 23.85 mL of 0.1311 M NaOH was required to titrate 5.00 mL of vinegar. noit reaction and dissociat rs bios olisos to dne hsq 2sm oq etb s sbubni A.2nileblu lnbotsrds nidslw .29ituoibidnembeqxins bns 2 e lo asS o (E. 4) uph nolto n 92 rt onithsie sted qid ierud srdt i asiddud tis svome of ballst ine dno 6 2 slddud his edd cnolienird douon t Vsi sbbeakc ut asw ql erd brs oldoloe HOs bluoW ed dnslom HO O oisiqxB 1ipid ood 1o wo 9U2MGE 6.AB breb 1UOY .S…
After studying the separation scheme for Group III cations and using your background knowledge on separation of Group I and Group II cations: (a) devise a flow chart or schematic diagram to separate and confirm the presence of the given ions in the solution below; (b) write the chemical formula of the precipitates formed; and (c) provide a brief explanation about your schematic diagram.