In the multistep reaction, a bromine in acetic acid solution was used that contained 0.15mL of bromine in 0.3mL of acetic acid. If 0.90mL of this solution was used, how many moles of bromine and acetic acid did was used for this reaction? (Bromine: MW = 159.81 g/mol, density = 3.119 g/mL; Acetic acid: MW = 60.05 g/mol, density = 1.049 g/mL ) %3D
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- A sample of freshly precipitated and filtered silver chloride weighs 459.0 mg. If 1.00 % of the silver chloride becomes photo decomposed, what is the precipitate’s weigh?Gravimetric analysis of Fe3O4 (MW = 232 g/mole) may be undertaken with the following reactions: Fe3O4 → Fe2O3 → Fe (OH)3. Weight of sample containing 8.00% Fe3O4 that must be taken to obtain a precipitate of Fe(OH)3 (MW = 107 g/mole) that weighs 150 mg is . a. 0.108 g b. 0.325 g c. 1.355 g d. 4.065 g Amount of Fe2O3 (MW = 160 g/mole) from which 150 mg of Fe(OH)3 (MW = 107 g/mole) may be obtained is . a. 0.112 g b. 0.224 g c. 0.448 g d. none of the other choices12 AA EE AaBbCcD AaBbCcD AaBbCc AaBbCcf A x' Aa T Normal T No Spac... Heading 1 Heading 2 Paragraph Styl 3 1. 4. B. Fill in the missing reactant or reagent or product to bring about the following chemical reactions. CH, CH, HC 1. CH NaH OH H.C CH;CH21 2. CH, H,O CH, H,SO, H;C Na SH CH,CH,CH,SH CH, CH, H.C CH, CH, pines) 3. 4. 5.
- O Launch Meeting - Zoom O Launch Meeting - Zoom od212ou%3D2591470&isprv &drc3D1&qi=24592388cfql%=D08drnb- ttempt 1 A honeycomb-shape casing of the metals platinum (Pt), rhodium (Rh), and palladium (Pd) in catalytic converters of automobiles cause more reactions to take place that produce less harmful gases without being affected by the reaction. These metals are catalysts because: They cause the reactions without being affected. They are formed into a honeycomb shape. They are metals. They help produce less harmful gasses.Over time, as their free fatty acid (FFA) content increases,edible fats and oils become rancid. To measure rancidity, the fator oil is dissolved in ethanol, and any FFA present is titrated withKOH dissolved in ethanol. In a series of tests on olive oil, a stocksolution of 0.050 Methanolic KOH was prepared at 25C, storedat 0C, and then placed in a 100-mL buret to titrate any oleic acid[CH₃(CH₂)₇CH=CH(CH₂)₇COOH] present in the oil. Each offour 10.00-g samples of oil took several minutes to titrate: thefirst required 19.60 mL, the second 19.80 mL, and the third and fourth 20.00 mL of the ethanolic KOH.(a) What is the apparent acidity of each sample, in terms of mass% of oleic acid? (Note:As the ethanolic KOH warms in the bu-ret, its volume increases by a factor of 0.00104/C.)(b) Is the variation in acidity a random or systematic error? Ex-plain.(c) What is the actual acidity? How would you demonstrate this?Read the problem and answer the following questions. Reactions are attached in the picture Yuno wants to assess the quality of water in the Clover Kingdom and the Heart Kingdom. In order to do this, he took a 200.0 ml sample (T= 20oC) from the two areas and titrated them with sodium thiosulfate. The water from the Clover Kingdom used up 7.15 ml of the titrant while 7.65 ml where used on the Heart Kingdom’s water. Prior to this, 0.1000g of potassium iodate (FM: 214.01 g/mol; 99.97% purity) was weighed and subsequently dissolved in 150.0 ml of distilled water. He took 20.00 ml aliquot of this solution and added 20.00 ml of distilled water. He then treated the solution with potassium iodide and sulfuric acid. Finally, Yuno titrated the solution with 13.7 ml sodium thiosulfate titrant. Determine the concentration of the titrant in M. Calculate the dissolved oxygen (DO) content of the two water samples in ppm O2.
- 30jud to 28AM basu mw 5. Sodium carbonate is a reagent that may be used to standardize acids in the same way that you have used KHP in this experiment. In such a standardization it was found that a 0.498-g sample of sodium carbon- ate required 23.5 mL of a sulfuric acid solution to reach the end point for the reaction.The first goal is to make the oxalic acid standard solution. You measure 1.5232 g of oxalic acid on an analytical balance, add it to a 250-mL volumetric flask and add deionized H2O to a final volume of 250.0 mL. Molar mass of H2C2O4•2H2O = 126.07 g/mol Mass of H2C2O4•2H2O = 1.5232g Volume of H2C2O4•2H2O solution = 250.0mL What is the Molarity H2C2O4 standard solution ?The first goal is to make the oxalic acid standard solution. You measure 1.5232 g of oxalic acid on an analytical balance, add it to a 250-mL volumetric flask and add deionized H2O to a final volume of 250.0 mL. Molar mass of H2C2O4•2H2O = 126.07 g/mol Mass of H2C2O4•2H2O = 1.5232g what is the Number of moles of H2C2O4•2H2O?
- The reaction between methanol (CH³OH), and hydrobromic acid (HBr) forms bromoethane (CH³Br) and water (H₂0). Our reaction recipe calls for 1.3 molar equivalents of hydrobromic acid for every mole of methanol. a. What is the stoichiometric ratio of hydrobromic acid and bromoethane for the reaction as it occurs? b. If you run the reaction with 2.5 moles of methanol, how many moles of hydrobromic acid does our recipe call for? How many moles of hydrobromic acid would actually be used in the reaction?This series demonstrates a drop-by-drop addition of 0.5 M potassium chromate solution (? ??? ) to 0.5 M barium chloride solution (???? ). What observations indicate that a chemical reaction has occurred Break up the reactants into ions. Switch the cations. Use the “criss-cross” method to get the balanced formulas for the products. Write the balanced molecular equation for this reaction, including phase labels. Write the complete ionic equation for this reaction. Write the net ionic equation for this reaction. What is the precipitate?Determine the percent yield of the synthesis. The % yield = 81.33 % The Theoretical Yield = 2.65g The Actual Yield = 3.256g Part I Synthesis of Aspirin Mass of salicylic acid used (g) 2.029g Volume of acetic anhydride used (mL) 5ml Mass of acetic anhydride used (vol. × 1.08 g/mL) 5.4g Mass of aspirin synthesized (g) 3.256g Part II Melting Temperature Data Melting temperature (°C) 133°C Part III Salicylic Acid Standard Stock Solution Initial mass of salicylic acid (g) 0.210g Moles of salicylic acid (mol) 0.0147mol Initial molarity of salicylic acid (M) 0.724 M Part III Beer’s Law Data for Salicylic Acid Standard Solutions Trial Concentration (M) Absorbance Water (mL) 1 0.724 M 0.301 0 2 0.724 M 0.219 2.5 3 0.724 M 0.163 5.0 4 0.724 M 0.074 7.5 Best-fit line equation for the salicylic acid standards Test of the Purity of the Synthesized Aspirin…