Color BEFORE adding Color AFTER adding Intensity of color AFTER adding FeCl3 Test Tube # FeCl3 FeCl3 #1 (salicylic acid) clear lilac |100% # 2 (commercial aspirin A) clear slightly pink 50% #3 (commercial aspirin B) clear lilac 95% #4 (aspirin from your synthesis above) #5 (control) clear pink 20% clear clear 0% Based on this data and the melting point of Aspirin, how pure is the synthesized product?
Q: Calcium carbonate decomposes to form calcium oxide and carbon dioxide, like this: CACO3(s) CaO(s)+CO...
A: given, CaCO3(s) → CaO(s) + CO2(g) volume of reaction vessel = 6.7 L mass of CaCO3 = 56.4 g mass of C...
Q: Part A Hydrogen can be extracted from natural gas according to the following reaction: CHa (9) + CO2...
A: Given:- To find:- Mass of H2(g). At the equilibrium=?
Q: Some plant fetilizers contain potassium oxide [K2O] calcium phosphate [Ca3(PO4)2], phosphorus oxide ...
A: Types of bonds in the given compounds:
Q: (CH3(CH2),CH,) reacts with gaseous oxygen gas (02) to produce gaseous carbon dioxide (CO2) and gaseo...
A:
Q: If an mL of phenolphthalein is utilized rather than drops, what would be the implication/s?
A:
Q: Assuming the net reaction is an exothermic process. Which of the potential energy diagrams best repr...
A: The net reaction is assumed to be exothermic in nature. This is a nucleophilic substitution reaction...
Q: Reaction of an ester with DIBAH/toluene/-78°C followed by H3Ot yields which of the following functio...
A:
Q: Predict the products of each reaction below. Indicate regiochemistry and stereochemistry when releva...
A: Kmno4 is strong oxidising agent. Over oxidation takes place.
Q: Calculate the mass of Kr in a 8.57 L cylinder at 96.6 °C and 4.48 bar. mass: g
A:
Q: 13F - NMR 'H, Bip Comment on the and HP Fz cconcidering Jp-F > Iecn', Tpmn Y
A:
Q: а) CH:СH2CHCH-CH2CH2ОН b) (CH:CH)2CH2CH-ОH с) (CH3)2СНCH2СНОНСНЗ d) CH3CH2CH2CH2CH2OH e) (CH3CH2)2C(...
A: We have to find out which of the following alcohols listed below has the highest rate of reaction wi...
Q: Question 8 0. Predict a possible product (if one is possible) for the following Friedel-Crafts Alkyl...
A: Given reaction is intramolecular Fridel craft reaction.
Q: You need to make 100 mL of a 2.5% dextrose solution for a hypoglycemic kitten using the 50% stock so...
A: Given that, a 100 mL of 2.5% dextrose solution for a hypoglycemic kitten using the 50% stock solutio...
Q: Draw the organometallic reagent with all covalent bonds. There are two ways this target molecule cou...
A:
Q: A 4g sample of methanol(CH3OH) is burned in a calorimeter whose heat capacity is 726.1 kJ/°C. The te...
A:
Q: Calculate the kinetic energy of a 0.16 kg baseball moving at a speed of 25.0 Round your answer to 2 ...
A: Given that, the mass of a baseball is m = 0.16 kg. The speed of the it is v = 25.0 m/s. We have to c...
Q: A certain liquid X has a normal freezing point of -4.10 °C and a freezing point depression constant ...
A:
Q: What is electronegativity?
A: Covalent Bond is formed by sharing of electrons between two atoms Covalent bond is of two types:- P...
Q: Draw the major organic product(s) the following reactions: No mechanisms are required, just the fin...
A: Imine bond break into ketone and amine when it is treated with acid hydorlysis 1,4-nucleophilic ...
Q: 11. It has been determined that the body can generate 5500 kJ of energy during one hour of strenuous...
A: Energy generated during one hour exercise = 5500kJ Heat of vaporization of water = 40.6kJ/mol Time o...
Q: Calculate the pH of the following solutions. - 0.020 M HCl
A: Hydrogen ion concentration is an important parameter of an aqueous solution. The concentration of th...
Q: What is the IUPAC name for the following compound?
A: 1. Select the principle carbon chain 2. Numbering 3. Naming (prefix + word root + suffix)
Q: Use the table of solubility rules for ionic compounds in water to predict whether each of the follow...
A: • The given ionic compounds are - NaI , PbS , AgCl , LiCl , FeO and KOH • We need to determi...
Q: Determine the pH at the equivalence (stoichiometric) point in the titration of 44.27 mL of 0.138 M m...
A: Given data : Concentration of morphine = 0.138 M Volume of morphine = 44.27 mL Concentration of HCl ...
Q: 3 of 15 If [H] in a solution at SATP is 0.0067 M, [OH]= O 6.7x10 17M O 1.5x10 12M O 2.2 M O 0.0063 M...
A:
Q: the Calculate the AHn for this reaction using CH.(g) + 2 H,O(g)→ 4H2(g) + CO2(g) Bond Energy (kJ/mol...
A: CH4 + 2H2O ->4H2 + CO2
Q: A hydrocarbon contains 74.98 % carbon, the remainder hydrogen. Determine the empirical formula of th...
A:
Q: A chemical engineer is studying the following reaction: 4 HCI(g)+O,(9) → 2 H,O(9)+2Cl,(g) At the tem...
A:
Q: "Synthesis gas" is a mixture of carbon monoxide and water vapor. At high temperature synthesis gas w...
A: Initial moles of CO = 5.8 mol
Q: Consider this equilibrium reaction at 400 K. Br, (g) + Cl, (g) = 2 BRCI(g) K. = 7.0 If the compositi...
A: given, the equilibrium reaction at 400K Br2(g) + Cl2(g) ⇔ 2 BrCl(g), Kc = 7.0 at 400K, composition ...
Q: A gas cylinder that contains helium has an internal volume of 17.2 L. A pressure gauge attached to t...
A: Given :- Internal volume of cylinder = 17.2 L Temperature = 21.9°C Pressure = 1990 psi To calcul...
Q: Part B Consider the following reaction: H2 (9) + I2 (g) = 2 HI (g) A reaction mixture at equilibrium...
A:
Q: Which indicator would be the best to use for a titration between 0.30 M (CH3)2NH with 0.30 M HI? You...
A: An indicator gives the information about the equivalence point in an acid base titration by changing...
Q: Aspirin can be prepared from salicylic acid (C7H6O3), which has a molar mass of 138.12 g/mol, and ac...
A:
Q: The pH of a buffer prepared by adding 0.708 mol of the weak acid HA to 0.305 mol of Na in 2.00 L of ...
A: Given, The pH of a buffer prepared by adding 0.708 mol of the weak acid HA to 0.305 mol of NaA in 2...
Q: The following molarities were calculated from replicate standardization of a solution: 0.5021, 0.501...
A:
Q: For each system listed in the first column of the table below, decide (if possible) whether the chan...
A: When crystallization takes place some amount of dissolved salt crystallizes and the movement of solu...
Q: Consider the following reaction: H2 (9) + I2 (g) = 2 HI (g) A reaction mixture at equilibrium at 175...
A: To calculate the partial pressure of HI , when the reaction reaches equilibrium again, we would firs...
Q: Acetylene (CH.) gas is often used in welding torches because of the very high heat produced when it ...
A:
Q: Question 4 Consider the following reaction, which is initially at equilibrium. Which of the followin...
A: Le Chatelier principle help in prediction of the direction of the equilibrium Here we are required t...
Q: Gaseous butane (CH;(CH2),CH3) CH3) reacts with gaseous oxygen gas (02) to produce gaseous carbon dio...
A:
Q: If you start with 1 million atoms of a particular radioactive isotope, how many half-lives are requi...
A:
Q: 8. The pH at one-half of the equivalence point in a weak acid – strong base titration was determined...
A: Given, pH at one-half of the equivalence point in a weak acid-strong base titration = 4.13 What is...
Q: Is high or low electronegativity associated with increased metal reactivity?
A:
Q: Copper(I) ions in aqueous solution react with NH, (aq) according to Cu* (aq) + 2 NH, (aq) Cu(NH, ); ...
A: The solubility constant of a compound is the multiplication of molar solubility of each constituent ...
Q: Predict the product(s) of the following reaction 1) LIAIH4 (excess) 2) H* workup 3) PCC (excess)
A:
Q: 0.035x10-mol M of Ca2+. 0.012M 2.92x10-3L 0.07x10-mol Calculated Ksp 0.069x103 0.063x103 0.053x103 M...
A: % error can never be negative as it is the mode value i.e., negative is not considered. % error = | ...
Q: In the UV assay of paracetamol you are required to weigh tablet powder "...containing 0.150 g of Par...
A:
Q: A sample of solid sodium hydrogen phosphate is dissolved in water and allowed to come to equilibrium...
A:
Q: Calculate the mass of glucose (CH,206) that contains a billion (1.000 × 10°) hydrogen atoms. Be sure...
A:
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
- TITRIMETRIC DATA SAMPLE: CANE VINEGAR % acidity in label: 4.5% %purity of KHP: 99.80% FORMULA WEIGHT of KHP: 204.22 g/mol STANDARDIZATION OF NaOH SOLUTION TRIAL 1 TRIAL 2 TRIAL 3 Weight of KHP, g 0.1012 0.1004 0.09987 Initial volume of NaOH, mL 5.00 10.01 Final volume of NaOH, mL 4.95 9.99 14.93 Molarity of NaOH Average Molarity of NaOH ANALYSIS OF ACETIC ACID IN A VINEGAR SAMPLE TRIAL 1 TRIAL 2 TRIAL 3 Volume of vinegar, mL Initial volume of NaOH, mL 1.00 1.00 1.00 14.98 22.90 30.87 Final volume of NaOH, mL 22.84 30.77 38.75 Molarity of acetic acid Average molarity of acetic acid ANALYSIS OF CARBONIC ACID IN A SODA SAMPLE TRIAL 1 TRIAL 2 TRIAL 3 Volume of soda, mL 20.0 20.0 20.0 Initial volume of NaOH, mL 20.20 22.05 23.93 Final volume of NaOH, mL 22.03 23.89 25.8 Molarity of carbonic acid Average molarity of carbonic acidTable of chemicals and reagents with their physicochemical properties (name, molecular formula, molecular weight, pKa, melting point, boiling point, etc.) Write a short outline or a flow diagram of the procedure List and safety issues Read and understand the MSDS information for each chemical used in this practical Experimental procedure Please do not scratch the clear sides of the UV cuvettes as this will invalidate your results. Part 1: Preparation of a calibration curve A calibration curve should be constructed using at least five concentrations of the pure paracetamol standard supplied in the range 3-15 ug/mL as follows: Weigh about 150 mg of paracetamol accurately and transfer to a 200 mL volumetric flask. Add 50 mL of o.1 M NaOH and dilute to about 100 mL with deionised water (DI). Shake and make up to volume with DI water. Dilute 10 mL of the resulting solution to 100 mL (volumetric flask) with DI water (= stock solution). Prepare standard solutions containing 3, 6, 9, 12 and 15…✓ Question Completion Status: Shown below is a calibration curve for the analysis of theobromine and caffeine in chocholate. if an unknown sample has a caffiene peak height of 3.50 cm what is the concentration of caffeine in the sample in ppm? 20 Peak height (centimeters) 15 10 5 0 Theobromine y = 0.1977x-0.2104 25 Unknown Figure 0-7 Gumantative Chemical Analysis, Seventh Edition 2007 Freeman and Company Caffeine y = 0.088 4x-0.030 3 50 Analyte concentration (parts per million) 100 M ED Feb 2 8:3
- hjhdg with solution sdfStandardization of 0.10 M HCl1. Take three (3) clean and properly labeled 250-mL Erlenmeyer flasks. Into the three flasks, weigh 0.1 g of the primary standard Na2CO3 to the nearest 0.1 mg. Record the weights of the primary standard.2. Add about 75.0 mL of boiled distilled water and swirl to dissolve the solids.3. Add 2 to 3 drops of phenolphthalein indicator. Record the initial burette reading and titrate with the prepared 0.10 M HCl solution until phenolphthalein endpoint.4. Record the final burette reading for each titration in your data sheetDetermination of Ksp and Molar Solubility1. Add Ca(OH)2 to 250.0 mL distilled water with stirring until equilibrium is achieved. 2. Filter the undissolved precipitate. Measure out 50.0 mL of the supernate into a 250-mL Erlenmeyer flask using a pipette.3. Add a few drops of phenolphthalein indicator and titrate with standardized HCl solution until endpoint is achieved.4. Record the volume the HCl solution used. Perform two more trials.…Standardization of 0.10 M HCl1. Take three (3) clean and properly labeled 250-mL Erlenmeyer flasks. Into the three flasks, weigh 0.1 g of the primary standard Na2CO3 to the nearest 0.1 mg. Record the weights of the primary standard.2. Add about 75.0 mL of boiled distilled water and swirl to dissolve the solids.3. Add 2 to 3 drops of phenolphthalein indicator. Record the initial burette reading and titrate with the prepared 0.10 M HCl solution until phenolphthalein endpoint.4. Record the final burette reading for each titration in your data sheetDetermination of Ksp and Molar Solubility1. Add Ca(OH)2 to 250.0 mL distilled water with stirring until equilibrium is achieved. 2. Filter the undissolved precipitate. Measure out 50.0 mL of the supernate into a 250-mL Erlenmeyer flask using a pipette.3. Add a few drops of phenolphthalein indicator and titrate with standardized HCl solution until endpoint is achieved.4. Record the volume the HCl solution used. Perform two more trials.…
- MX (Ksp = 2.42x10-11) Express your answer in moles per liter. S = Submit Part B S = IVE ΑΣΦ PbCl2 (Ksp = 1.17x10-5) Express your answer in moles per liter. Part C Request Answer Submit Request Answer S = 15| ΑΣΦ Ca(OH)2 (Ksp = 4.68x10-6) Express your answer in moles per liter. IVE ΑΣΦ Submit Request Answer www wwwww ? ? ? M M MDensity of solution:Trial 1: 1.2 g/mLTrial 2: 1.2 g/mLTrial 3: 1.2 g/mL Average density = 1.2 g/mL What is the relative average deviaion, %?30 20 10 From the procedure 2. Assemble the simple distillation apparatus as generally shown in Figure SD.1 in the lab manual, ensuring that the thermometer bulb is aligned at, or slightly below, the Y in the distillation head. Each ground joint is greased by putting three or four stripes of grease lengthwise around the male joint and pressing the joint firmly into the other without twisting. 3. Attach a water condenser to the distillation head. 4. Remember, water goes in the bottom and out the top. Attach a clamp holder to the end of the drain tube to keep it weighted in the drain. Turn water to a trickle. If it is slowly draining, it is high enough. Begin a low flow of water through the condenser. 5. Place the set up on a heating/stir plate. 6. Turn on the hot plate to start heating the solution. Monitor the temperature and the boiling of the solution throughout the distillation process. 7. Record the temperature of the distillate when the first drops are recovered. 30.0 8. Adjust…
- An experiment is started with 6g of a 1:1:1 ratio mixture of benzoic acid, 2-naphthol, and hydroquinone dimethyl ether. The experiment is finished with 0.2 g of 2-naphthol. What is the percent recovery? 10% 50% 3% 16%SELECT correct responses only 1) Volume percent (v/v%) is temperature-independent. 2) There are three major approaches to expressing solution concentration in terms of percent concentration: weight percent, volume percent, and weight/volume percent. 3) Weight/volume percent (w/v%) is a unit-less quantity. 4) The term 'percent' refers to 'parts per thousand'. 5)A standard solution is a reagent of known concentration that is used to carry out a volumetric titration. 6) The endpoint of a titration is the theoretical point reached when the amount of added titrant is chemically equivalent to the amount of analyte in a sample. 7) A substance that changes color in response to chemical equivalence is known as an indicator. 8) Given a sufficiently diligent and experienced experimenter, it is sometimes possible to reach a titration volume error value of 0.Rx Mercury Bichloride 0.1%Resorcin Monoacetate (liq) 3%Isopropyl Alcohol ad 250. Sig. For the Scalp How many grams of mercury bichloride and how many milliliters of resorcin monoacetate should be used in compounding the prescription? Mercury bichloride_______ g Resorcin monoacetate ________mL