calculate the theoretical percent purity of the purified crystal 12 g A9.2 g BHOT FILTRATIONfiltrateresidue8 g A7.2 g B4 g A2 9 BCOLD FILTRATIONfiltrateprecipitate5.4 g A6.0 g B2.6 g A1.2 g B

Purified crystals are usually obtained via hot filtration method. Given: Initial mass of A = 12 g…

Answered: calculate the theoretical percent…

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calculate the theoretical percent purity of the purified crystal

General Chemistry - Standalone book (MindTap Course List)

11th Edition

ISBN:9781305580343

Author:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell

Publisher:Steven D. Gammon, Ebbing, Darrell Ebbing, Steven D., Darrell; Gammon, Darrell Ebbing; Steven D. Gammon, Darrell D.; Gammon, Ebbing; Steven D. Gammon; Darrell

Chapter6: Thermochemisty

Section: Chapter Questions

Problem 6.94QP

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A soft drink contains an unknown mass of citric acid, C3H5O(COOH)3. It requires 6.42 mL of 9.580 × 10−2-M NaOH to neutralize the citric acid in 10.0 mL of the soft drink. C3H5O(COOH)3(aq) + 3 NaOH(aq) → Na3C3H5O(COO)3(aq) + 3 H2O(ℓ) Determine which step in these calculations for the mass of citric acid in 1 mL soft drink is incorrect? Why? n (NaOH) = (6.42 mL)(1L/1000 mL)(9.580 × 10−2 mol/L) n (citric acid) = (6.15 × 10−4 mol NaOH) × (3 mol citric acid/1 mol NaOH) m (citric acid in sample) = (1.85 × 10−3 mol citric acid) × (192.12 g/mol citric acid) m (citric acid in 1 mL soft drink) = (0.354 g citric acid)/(10 mL soft drink) Determine the correct result.
A student was able to separate the three components of a mixture via liquid chromatography. She obtained 1.27 g1.27 g of component A, 0.950 g0.950 g of component B, and 0.260 g0.260 g of component C. Determine the mass percent of each of the three components in the mixture.
Consider the reaction. 2Al(s)+Fe2O3(s)−→−heatAl2O3(s)+2Fe(l)2Al(s)+Fe2⁢O3⁡(s)→heatAl2⁢O3⁡(s)+2Fe(l) If 18.3 kg Al18.3 kg Al reacts with an excess of Fe2O3,Fe2⁢O3, how many kilograms of Al2O3Al2⁢O3 will be produced? mass of Al2O3Al2⁢O3 produced:
4. A new procedure for the determination of sulfur in coal was tested on a standard coal sample with a certified value of 2.14% sulfur by mass. The new procedure gave results of 2.11%, 2.07%, 2.04%, 2.06%, and 2.16% for five separate determinations. a) Does the new procedure give the correct result at the 95% confidence level? b) Does the new procedure give the correct result at the 90% confidence level?
Aspirin can be prepared from salicylic acid (C7H6O3 ), which has a molar mass of 138.12 g/mol, and acetic anhydride (C4H,O3 ), which has a molar mass of 102.04 g/mol. The density of acetic anhydride is 1.082 g/mL. C7H6O3 + C4H;O3 → C,H§O4 + C2H3O2 What is the theoretical yield, in grams, of aspirin ( C9H3O4 ), which has a molar mass of 180.15 g/mol, possible when reacting 3.06 g of salicylic acid with 3.71 mL of acetic anhydride? Type answer:
Balance thechemical equation _CaCl2 (aq) + _Na2CO3 (aq) ------->_CaCO3 (s) + _NaCl (aq) Identify type ofreaction _NaCl (aq) + _AgNO3 (aq) -------->_NaNO3(aq) + _Agcl (s) Identify type ofreaction
Explain the significance of gravimetric analysis? Give a specific example by enumerating the steps of the analysis.
(98) 101.1 102.9 106.4 107.9 112.4 114.8 118.7 121.8 56 57 72 73 74 75 76 77 78 79 80 81 82 83 Cs Ва La Hf Ta W Re Os Ir Pt Au Hg 197.0 200.6 204.4 TI Pb Bi 132.9 137.3 138.9 178.5 180.9 183.9 186.2 190.2 192.2 195.1 207.2 209.0 87 88 89 104 105 106 107 108 109 110 111 112 113 114 115 Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Rg (269) (277) Cn Uut F1 Uup (2 (223) (226) (227) (261) (262) (263) (264) (265) (268) (269) (289) Lanthanide Series 58 59 60 61 62 63 64 65 66 67 68 69 70 Ce Pr Nd Pm Sm Eu Gd Tb Dy 162.5 Но Er Tm Yb 140.1 140.9 144.2 150.4 152.0 (145) 93 157.3 158.9 164.9 167.3 168.9 173.0 17 Actinide Series 90 91 92 94 95 96 97 98 99 100 101 102 11 Th Pa U Np (237) Pu Am Cm Bk Cf Es Fm Md No 232.0 231.0 238.0 (244) (243) (247) (247) (251) (252) (257) (258) (259) (20 Question 2 Which of the following statements about atomic spectra is incorrect? O No two elements have identical atomic spectra O An electron dropping between two specific energy levels always emits the identical spectral line O…
Aspirin can be prepared from salicylic acid (C7H6O3), which has a molar mass of 138.12 g/mol, and acetic anhydride (C4H6O3) which has a molar mass of 102.04 g/mol. The density of acetic anhydride is 1.082 g/mL. C7H6O3+C4H6O3⟶C9H8O4+C2H4O2 What is the yield, in grams, of aspirin (C9H8O4), which has a molar mass of 180.15 g/mol, possible when reacting 2.10 g of salicylic acid with 1.01 mL of acetic anhydride?
A solution is prepared by dissolving 4.40 g of KSCN in enough water to make 340. mL of solution. What is the concentration (molarity) of the solution? For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUS Paragraph v Arial EX² X₂ ¶ ¶< +₁ V 10pt √ ¶T E v 田く T HH 26
Page of 2 + ZOOM 1. Balance these equations. a. Al(s)+O2(g)¬→Al½O3(s) b. N2(g)+H2(g)→NH;(g) c. C,H6(1)+O2(g)→H2O(1)+CO2(g) 2. Balance the following equations. а. СаС2(8)+Н-О() --Са(ОН)2(s)+СH-(g) b. (NH4)2Cr2O7(s)→Cr2O3(s)+N2(g)+H2O(g) c. CH;NH2(g)+02(g)→CO2(g)+N2(g)+H2O(g) 3. An explosive whose chemical formula is C;H,N6O6 produces water, carbon dioxide, and nitrogen gas when detonated in oxygen. Write the chemical equation for the detonation reaction of this explosive. 4. A number of compounds are used in cement, and reactions among them occur when water is added. In one, CaO reacts with Al2O3 and water to form Ca3Al2(OH)12. Write a balanced chemical equation for this process. 5. Ethanol, C2H5OH, is found in gasoline blends used in many parts of North America. Write a balanced chemical equation for the combustion of C2H5OH to form CO2 and H2O. 6. Balance the following equations. a. reaction to produce "superphosphate" fertilizer: Ca3(PO4)2(s)+H2SO:(aq)→Ca(H,PO4)2(aq)+CaSO4(s) b.…
In the room, the police also found a suspicious amount of CO2 in the air, which is produced when methanol is burned. They said that there was an extra 7000 grams of carbon dioxide in the room. The police say that Gresham would have needed at least 5000 grams of methanol to burn a person to death. Was there enough carbon dioxide (CO2) in the room to prove that Gresham is the murderer? 2 CH4O + 3 O2 Æ 2 CO2 + 4 H2O Clue: Police found 7000 grams of CO2 in the room. Convert grams of carbon dioxide (CO2) into grams of methanol (CH4O) to see if there was enough methanol for a murder. SHOW ALL WORK Was there enough? Is this man the murderer? Answer in complete sentences. Must be at least 4 sentences

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