1. What type of precipitate is BaSO4? 2. Why is a filter paper preferred over a sintered glass filter? 3. What made an ashless filter paper ashless?
Q: 2. Draw the curved arrow notation for each elementary step of the reaction sequence described below....
A:
Q: The following Rf values were computed from a normal phase chromatography experiment. Arrange them fr...
A:
Q: What is the pKa of HC4H4O6 ? 2.17 10.26 O 6.59 8.15 4.34
A: generally pka gives the acidic nature of the molecule lower the pka more will be the acidic nature ...
Q: If a universal indicator was added to H2O (l) + CO2 (g) → H2CO3 (aq) what color would the solution b...
A: When we add carbon dioxide gas to liquid water, then solution become acidic. Solution become acid me...
Q: At 25oC TlCl has a solubility of 1,64x10-2 M in pure water. Calculate the solubility in 2,5x10-2 M K...
A: Given that, at 25°C TlCl has a solubility of 1.64×10-2 M in pure water, i.e., s = 1.64×10-2 M. We ha...
Q: H-CI: 5) For the following multi-step reaction involvling a carbocation Overall Transformation CH3 C...
A:
Q: 1. Using this chemical equation. 3Na + AICI3 3NaCl + Al If 16 g Na and 8 g AICI3 are allowed to reac...
A:
Q: 2. A solution that may contain Cu, Bi", Sn*, or Sb2* is treated with thioacetamide in an acidic medi...
A: 1)A solution that may contain Cu2+, Bi2+, Sn4+, or Sb2+ is treated with thioacetamide in an acidic m...
Q: Ammonia gas can be prepared by the following reaction: CaO(s) + 2 NH4C1(s) →2 NH3(g) + H2O(g) + CaCl...
A: Given data,Mass of CaO=480gMass of NH4Cl=960gTheoretical yield of NH3=291gActual yield of NH3=147g
Q: Write the Hamiltonian operator for the LiH molecule. Which of the terms in the Hamiltonian operator ...
A:
Q: 1. A vessel of volume 24.4 dm3 contains 1.0 mol H2 and 2.5 mol N2 at 298.15 K. Calculate (a) the mol...
A: 1) Mole fraction (χ) of a component is the ratio of mole of a component to the total moles of compon...
Q: 5. A conductivity cell filled with 0.10 demal KCI solution gives at 25°C a resistance of 910 ohms. W...
A:
Q: What is the goal of the lab on qualitative analysis of aqueous ions and solubility?
A:
Q: You plan to synthesize your favorite ester Isoamyl acetate (banana smell) during your next lab perio...
A: A question based on equilibrium concept that is to be accomplished.
Q: Consider an isothermal column of an ideal gas at 25oC. What must be the molar mass of this gas be if...
A:
Q: ) What is the name of the compound below? a) 3-oxopentanoic acid b) 1-acetopentanone c) acetopentano...
A: Here we have to write the IUPAC name of the following componund whose structure is given.
Q: 5. 2.6477 g of the reducing agent FeSO4 was titrated to the equivalence point with 17.25 mL of a KMN...
A:
Q: V Kc 7.30 0.959 0.650 8.16 1.062 3.49 11.33 0.688 3.35 1.734 0.700 3.24
A: A) CHCl2COOC5H11 ⇔ CHCl2COOH + C5H10 Initial moles ...
Q: 2. What quantity of heat is associated with the synthesis of 35.6 g of NH3 according to the followin...
A: Nitrogen oxide reacts with water to form ammonia and oxygen. According to the given reaction when on...
Q: What is the equilibrium pressure (in atm to three decimal places) of HBr for the following reaction ...
A: Given, H2 (g) + Br2 (g) ⇌ 2HBr (g) K = 0.00550 Initial pressure of H2 = P(H2)i = 1.000 atm Ini...
Q: 2. A solution that may contain Cu", Bi", Sn*", or Sb2* is treated with thioacetamide in an acidic me...
A: Qualitative analysis of captions and anions involve their solubility criteria as well as the color o...
Q: Question 18. What functional groups must the monomers have, to form a polyester? two carboxyl (2COOH...
A:
Q: Indicate the 2 carbanions that this compound can give. Point out the most stable and explain it.
A: Carbanion is species in which carbon carrying negative charge. In carbanion, carbon atom is sp³ hybr...
Q: A 25mg/L solution is prepared by diluting ul of a 50g/L solution into 10ml of water.
A: To determine the concentration of diluted solution, the following equation is used. M1V1 = M2V2 On r...
Q: [References] Styrene, the building block of polystyrene, consists of only C and H. If 0.878 g of sty...
A:
Q: Consider the following reaction: A (s) B (g). The.molar heat capcities of A (s) and B (g) are 55 and...
A:
Q: A certain gas obeys the van der Waals equation with a = 0.580 m6 Pa mol–2. Its volume is found to be...
A:
Q: Complete hydrolysis of which of the following disaccharides yields a single monosaccharide? lactose...
A:
Q: The following compounds have the boiling points shown: CH4 = -162 °C SIH4 = -112 °C GeH4 -88 °C SnH4...
A: We need to describe the trend in boiling point shown and reason behind it.
Q: Calculate the standard potential for the half-reaction below if the solubility product constant for ...
A: As per the guideline, since you have posted a question with multiple sub-parts, we have solved the f...
Q: Classify the reaction below: КОН ... - CH2CH2NH2 CH=CH2 heat A) rearrangement (B elimination c) subs...
A:
Q: 1) Outline reasonable synthetic schemes to convert pentane to 1-tritio-1-butyne 2) Draw a reasonable...
A: Here we have to synthesize 1-tritio-1-butyne from pentane by multistep reactions.
Q: What is the pOH of 0.003 M acetic acid solution (Ka = 1.8x10 5)
A:
Q: 47. A small amount of resin weighing 4.56g occupies a height of a 10-ml graduated cylinder equivalen...
A: Since you have posted multiple questions, the answer for first question is given below. Kindly repos...
Q: Retention time Substance(s) Peak area (%) (min) Crude product Pure product 8.725 1,2-cyclohexanediol...
A: In the analysis of gas chromatography, the evaluation of peak area is one of the most important aspe...
Q: In a certain zinc-copper cell, Zn(s) + Cu2+(aq) – Zn2*(aq) + Cu(s) the ion concentrations are [Cu2*]...
A: Given reaction is : Zn (s) + Cu2+ (aq) --------> Zn2+ (aq) + Cu (s) [Cu2+] = 0.0234 M [Zn2+] =...
Q: d. 2. Â(2e²ikx), Â = -3ih- d.
A: Differentiation of exponential is same .ie exponent. Any constant term is not differentiated, so i...
Q: TRUE OR FALSE The concentration of a solution is a macroscopic property and represents the amou...
A: We know concentration is the amount of solute dissolved in a given amount of solvent or solution . I...
Q: Methodology: Make schematic diagram for the procedure below B. % SO3 determination Dry the soluble...
A: We need to make a schematic diagram for the given procedure.
Q: 7:31 What effect would you expect the following changes to have on the SN2 reaction of CH3Br and CN-...
A: Nucleophilic substitution bimolecular SN2 reaction is first order with respect to each of the two re...
Q: Calculate the standard deviation for the molarity of ascorbic acid in the vitamin C supplement solut...
A: Formula for calculating the standard deviation: SD=∑(Average value-Value)2N
Q: 6. .... =mole/L. a) Mole fraction b) Molarity c) % Yield d) Normality
A: We are given : UNIT = mol/L We have to find the quantity that have unit of mol/L.
Q: Chemical name of the gas evolved when hydrogen fluoride is made to react with silica.
A: Since you have posted multiple questions, the answer for first question is given below. Kindly repos...
Q: Consider the reaction: 2NACI + CaC03 + Na2CO3 + CaCl2 Write the equilibrium expression for this reac...
A: Chemical equilibrium is defined as the stage at which both reactant and product are in equilibrium.
Q: Balance the reaction, do not leave any fractions, don't leave anything blank, then answer the questi...
A:
Q: Propane can be turned into hydrogen by the two-step reforming process. In the first step, propane an...
A:
Q: Iron ore is converted to iron metal in a reaction with carbon. 2 Fe2 O3 (s) + 3 C(s) →4 Fe(s) +3 CO2...
A:
Q: (b) Ammonia oxidizing bacteria (AOB) play an important role in nitrogen cycle. They are also utilize...
A: Note: As per our company guideline we can answer only three subparts. Kindly repost the question men...
Q: The aluminum in a 0.972 g sample of an unknown material was precipitated as aluminum hydroxide, Al(O...
A:
Q: A chemist prepares a solution of silver(I) nitrate (AGNO,) by measuring out 413. umol of silver(I) n...
A:
Step by step
Solved in 2 steps
- GUIDE QUESTIONS 1. What type of precipitate is BasO4? 2. Why is a filter paper preferred over a sintered glass filter? 3. What made an ashless filter paper ashless? 4. What does the number in a filter paper's brand represent? 5. Why is a porcelain crucible used in this procedure? 6. Why do we need to precipitate from a hot solution? 7. Why is the precipitating agent added all at once? 8. What is the purpose of adding 6M HCI in the sample solution? 9. Why do we need to test the washings with AgN0:? 10. What is done in an ignition process? 11. What is the product after the precipitate was ignited? 12. What are the advantages of performing ignition? 13. Cite the sources of errors for this experiment and explain how to possibly circumvent these kinds of problems.Guide Questions[1] What type of precipitate is BaSO4?[2] Why is filter paper preferred over a sintered glass filter?[3] What made an ashless filter paper ashless?[4] Why is a porcelain crucible used in this procedure?[5] Why do we need to precipitate from a hot solution?[6] Why is the precipitating agent added all at once?[7] What is the purpose of adding 6M HCl in the sample solution?[8] Why do we need to test the washings with AgNO3?[9] What is ignition?[10] What is the product after the precipitate was ignited?[11] What are the advantages of performing ignition?[12] Cite the sources of errors for this experiment and how to circumvent these problems.Why does the glasswares need to be rinsed with 0.1 M HNO3 prior to use?
- 8. The process by which a diverse ion gets trapped by a growing precipitate particle but does not become part of the crystal lattice A. occlusion В. adsorption C. post-precipitation D. inclusionWhy is recrystallization not applicable to samples which contain large amount of impurities?Distinguish absorption from adsorption. When you heat glassware in a drying oven, are you removing absorbed or adsorbed water?
- Which among the following solvents would PbBr2 (Ksp = 4.0 x 10-5) be least soluble in? a. 0.1 M Pb(NO3)2 (aq) b. pure water c. 0.1 M KCl d. 0.1 M KBr(aq)1. A sample of freshly precipitated silver chloride weighs 704.7 mg. Before the solution can be filtered and washed, 10.0 mg of AgCl is photodecomposed. After the precipitate is filtered and washed, another 10.0 mg of AgCl is photodecomposed. Calculate the weight of the precipitate.3. It is used to convert the known weight of the precipitate to the corresponding weight of the analyte. a. Gravimetric factor b. Mole ratio c. Mass ratio d. All of the choices 4. Which of the following is used to express the ppm of the solution? a. Kg analyte/liter solution b. Mg analyte/liter solution x 10^6 G analyte/ g sample x 10^6 d. Kg analyte/kg sample C.
- 2. The standard Winkler method uses sodium iodide and sodium azide to be added at the same time as sodium hydroxide. What is the purpose of sodium azide? 3. Chlorinated tap water contains both chlorine (Cl2) and hypochlorite (OCl-) does the presence of these species affect DO results? Write equations to represent their individual interactions.17. This type of analysis implies that the constituent determined was present in very, very low concentration. a. Macro analysis b. Semi-macro analysis c. Micro analysis 18. Which of the following does not happen during digestion? The crystals dissolve and re-precipitate under equilibrium conditions. b. Weakly bound water are lost from the precipitates. c. Filterability improves d. None of the choicesWhat is the expected visual observation when ether and hot, acidic potassium permanganate were mixed in a test tube? a. Formation of brown precipitate and disappearance of purple colorb. The purple color of potassium permanganate remains its purple color.c. Evolution of gas, formation of brown precipitate and disappearance of purple color