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- A student carried out the synthesis of aspirin as described using 3.0 g or salicylic acid and 6.0 ml of sccetic anhydide and abtained 1.306 g of asprin Calculate the theoreteical yield of aspirin Calculate the percent yield of aspirin.Write Kc or Kp of the following: 1. 2N2O5 (g) ↔ 4NO2 (g) + O2(g)Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the formula KHC8H4O4. This is often written in the short-hand notation as KHP. If 25.0mL of a potassium hydroxide solution are needed to neutralize 2.26g of KHP, what is the molarity of the potassium hydroxide solution? Potassium hydrogen phthalate sometimes called potassium biphthalate, as shown on this bottle is an acid that is convenient to store and use because it is a solid.
- An antiacid tablet contains 31.3 g of NaHCO3. What volume (in liters) of 2.84 M stomach acid, HCl, can this tablet neutralize?Consider the following reaction: 2 CN- + 5 ClO- + H2O --> N2 + 2 HCO3- + 5 Cl- How many Liters of 0.153M ClO- are needed to remove the CN- in 1.7x106 L of wastewater in which the CN- concentration is 0.63 mg/L?An aqueous solution containing 0.16 M of unknown base has a measured pH equal to 7.51. What is the value of pKb for the unknown base? Include 3 significant figures in the answer
- A 10 ml of concentrated acetic acid was added in a sufficient quantity of water to make 350 ml of the acid solution. SG acetic acid= 1.05 kb acetate = 5.556x10^-10 What is the weight of acetic acid in grams? What is the molarity (mole/Liter) of acetic acid solution? What is the ka of acetic acid? What is the Hydronium ion concentration? What is the pH of the solution?In the standardization of HCl using pure anhydrous sodium carbonate as the primarystandard for methyl orange as an indicator, 1.0 mL HCl was found to be equivalent to 0.05gof sodium carbonate (MW =106). The normality of HCl is:The number of moles of H2O produced in reaction of 50 mL 1.0 M HCl and 50 mL 1.0 M NaOH: (5.00×10−2) Joules released per mole of water formed: ?
- Caproic acid, HC6H11O2, is found in coconut oil and is used in making artificial flavors. A solution is made by dissolving 0.450 mol of caproic acid in enough water to make 2.0 L of solution. The solution has [H3O+] of 1.7 x 10-3 M. What is Ka for caproic acid?calculate stoichiometry; energy and heat in chemical reactions problems 1. C6 H8 O6 is a weak acid that can be determined by titration with NaOH. If titration is performed using 0.0136 M NaOH against a sample of C6 H8 O6 then: a) Determine the balanced equation between C6 H8 O6 and NaOH! b) If it takes 11.5 ml of NaOH to titrate 25 ml of C6 H8 O6 sample solution, determine the molarity of C6 H8 O6 in the sample solution! C) In a 100 ml volumetric flask, 1.3 grams of fruit sample are dissolved with water to generate the sample solution. From the flask, 25 mL of this solution was collected to be titrated with NaOH later. Determine the % of C6 H8 O6 in the fruit sample using this information!A 2.00 L bottle of soda when cold (0 °C), has a CO2 concentration of 0.105 M. When the bottle is opened andheated to 50 °C, most of the CO2 leaves the solution, and the CO2 concentration drops to 0.026 M. How manyGrams of CO2 bubbled out and left the solution? Use stiochemistry with divider lines in between numbers for the conversion factors and the answer is 7.0g CO210) The following questions use the balanced chemical equation below.3 Cu(NO3)2 + 2 K3PO4 º 6 KNO3 + Cu3(PO4)2(a) Calculate the volume of 0.750M Cu(NO3)2 solution required to react completely with 2.48L of a 1.19MK3PO4 solution. Use stiochemistry with divider lines in between numbers for the conversion factors (b) How many grams of Cu3(PO4)2 will be formed from the complete reaction of 18.5 mL of a 0.625MCu(NO3)2 solution?Use stiochemistry with divider lines in between numbers for the conversion factors The answer is 10a. 5.90L 10b. 1.47g 11) The following questions use the balanced chemical equation below.Zn + 2 HBr º…