Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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- Consider the following data: HX → X- + H+ Ką = 6.61 · 10- 5 H2A + НА + Н + Ka = 2.68 · 10-7 Calculate the Keg for the following reaction: H2A + X¯ + HA¯ +HX Record your answer in scientific notation to 3 sig figs.arrow_forwardQ5. As part of the aspirin synthesis lab, the orgo students also had to perform the following calculation to demonstrate their knowledge. Are you able to help them work this out? Saponification is a process in which soap is produced from the chemical reaction between animal fat (triglycerides) and a strong base such as KOH. An example of such a balanced chemical reaction is shown here: C51H98O6 + 3KOH à C3H5(OH)3 + 3C16H31O2K Triglyceride Soap If, during the saponification reaction, 231.5 g of C51H98O6 is mixed with 231.5 g of KOH and 160 g of soap is produced: Calculate the theoretical yield of soap (in grams), C16H31O2K, and indicate which species is the limiting reactant. Provide your answer to 2 decimal places (5). Calculate the percent yield for this reaction. Provide your answer to 1 decimal place (1). Show ALL steps and equations involved in your calculations. Remember to label all steps clearly and use appropriate units.arrow_forward18E(S) + SHOCAL) → 2 EeU₂(3) + 3H₂(g) FeU2(s) ○ 4.525€ > 0 0 4,5%, 0120 O A, S., 0 40 Q Search ******* ******* D ******* ****** ****** 24 $1arrow_forward
- Höhörs Chemistry- 4th Hour - Dr. Paul / Gases/Lesson 148 What does the kinetic molecular theory tell us about the temperature of a substance? O The temperature of a substance does not affect the motion of the particles. OA substance with a lower temperature has particles that move faster. O A substance with a higher temperature has particles that move slower. O A substance with a higher temperature has particles that move faster.arrow_forwardQ5. As part of the aspirin synthesis lab, the orgo students also had to perform the following calculation to demonstrate their knowledge. Are you able to help them work this out?Saponification is a process in which soap is produced from the chemical reaction between animal fat (triglycerides) and a strong base such as NaOH. An example of such a balanced chemical reaction is shown here:C57H110O6 + 3NaOH à C3H5(OH)3 + 3C18H35O2NaIf, during the saponification reaction, 228.5 g of C57H110O6 is mixed with 211.7 g of NaOH and 180 g of soap is produced: a. Calculate the theoretical yield of soap (in grams), C18H35O2Na, and indicate which species is the limiting reactant. Provide your answer to 2 decimal places. b. Calculate the percent yield for this reaction. Provide your answer to 1 decimal place. Show ALL steps and equations involved in your calculations. Remember to label all steps clearly and use appropriate unitsarrow_forwardCl₂(g) + 2e Cr₂0 (aq) + 14 H(aq) + 6€¯ O2(g) +4 H(aq) + 4e¯ MnO2(s) + 4H(aq) + 2e¯ 10, (aq) +6H(aq) +5e¯ VO₂+ (aq) + 2H(aq) + e¯ Br₂(1) + 2e NO, (aq) +4 H(aq) + 3e¯ ClO2(g) + e 2 Cl(aq) Ag* (aq) + e Fe3+(aq) + e 2 Cr³+ (aq) + 7 H₂O(1) 1.36 1.33 2 H₂O(1) 1.23 Mn2+(aq) + 2 H₂O(1) 1.21 12(aq) + 3H2O(l) 1.20 VO²+(aq) + H₂O(1) 1.00 2 Br (aq) 1.09 NO(s) + 2 H2O(1) 0.96 CIO₂ (aq) 0.95 Ag(s) 0.80 Fe2+(aq) 0.77 What is the E° cell for the reaction Cr₂O²² + CIO₂ → Cr³+ + CIO₂? a. 2.28 V. b. -2.28 V. c. 0.38 V. d. -0.38 V.arrow_forward
- Aşağıda verilen reaksiyonları tamamlayınız.arrow_forward14arrow_forwardMn04 (aq) + SH"(aq) + 5e → Mn2"(aq) + 4H201) Cry0,2 (ag) + 6e → 2Cr*(aq) + 7H2O0) Cu2" +1.51 V +1.33 V *(aq)+2e Cu(s) (aq) + 2e Pb(s) (aq) + 2e→ Fe(s) +0.34 V -0.13 V Fe2+ Al3*(aq) + 3e → AI(3) -0.44 V -1.66 V Refer to Exhibit 17-1. Determine E cell for the electrochemical cell designated by the cell notation below. Al(3) | Al3* (ag) || Cu2*(aq) | Cu(s) O a. +12.0 V O b.+5.66 V Oc.-2.00 V O d.-1.32 V O e. +2.00 Varrow_forward
- Many common materials that we ingest, though quite safe in reasonable quantities, become toxic when taken in very large doses. A measure of toxicity is the LD50 value (Lethal Dose, 50%). It is the quantity of material, expressed in mg of material per kg of subject-body-weight that, if administered to a population of subjects, would cause 50% of the population to die. The LD50 value for FD&C Red Dye No. 40 is >10,000 mg/kg in rats. Assume that the LD50 value for humans is the same as for rats. Calculate the number of mg of Allura Red present in an 8 fluid ounce glass of the beverage you used in this lab. Assume that the concentration of Allura Red in the beverage is 0.000054 M. The molar mass of Allura Red is 496.42 grams/mol 1 fl oz = 29.5735 mL Do not include units with your answer.arrow_forwardWater softening is necessary to prevent clog in plumbing and prevent formation of scum in bathrooms and sinks. O True O Falsearrow_forward20 cm3 of a gaseous hydrocarbon required 90 cm3 of oxygen for complete combustion. Both volumes were measured under the same conditions.The hydrocarbon must be?arrow_forward
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