What weight of pyrite ore (impure FeS2) should be taken for analysis that the no. of centigram of precipitated BaSO4 will be twice the percentage of FeS2?
Q: Q9. The rate constant of a reaction is measured at different temperatures. A plot of the natural log...
A:
Q: The equilibrium constant, Kc, for the following reaction is 1.80x10-2 at 698 K. Calculate Kp for thi...
A: Relation between Kp and Kc is Kp = Kc (RT)∆ng where ∆ng = No.of moles of gaseous products - N...
Q: 8. As a rough calculation (i.e. not a ICE table), follow the instructions for Part 3a to calculate t...
A:
Q: A gas at STP occupies 16 L of space. If the pressure changes to 2.6 atm and the temperature increase...
A: Given that Initial volume (V1) = 16L Final pressure (p2) = 2.6 atm Final temperature (T2) = 195°C Ne...
Q: = could have the following units: T = mL (milliliters); L (liters) - MUST be in Kelvin (K). If in Ce...
A: According to the our policy we should solve one question (if any subparts present then first three s...
Q: characterize the following reaction
A:
Q: Give the structural formula and name of the organic product of the reaction between CH3CH2CH2CH2Br a...
A: Given, CH3CH2CH2CH2Br reacts with potassium cyanide (KCN)
Q: I need help calculating the percent deviation please. reaction equation - 2 MnO4− + 5 C2O42− + 16 H+...
A: We would use formula of percent deviation to calculate percent deviation in Molarity of KMnO4.
Q: At what temperature will 2.00 mol of He fill a 6.00-L container at standard pressure? Enter your ans...
A:
Q: In an aqueous chloride solution cobalt(II) exists in equilibrium with the complex ion CoCl4². co2+(a...
A: Given reaction is : CoCl42- (aq) <-----------> Co2+ (aq) + 4Cl- (aq)
Q: Ten grams of all four substances above are pulled from the same container of hot oil with a temperat...
A: According to the thermochemistry, the expression for the heat absorbed or released is : q = m. C. Δ ...
Q: The equilibrium constant, Kc, for the following reaction is 1.63×105 at 524 K. NHẠCI(s) NH3(g) + HCl...
A: Kc is the equilibrium constant and it is ratio of product and reactant concentration at equilibrium ...
Q: A student ran the following reaction in the laboratory at 281 K: 2 CH2CI2 (g) = CH4 (g) + CCl4 (g) W...
A:
Q: • Part A A lead-acid battery uses a redox reaction in which lead(0) and lead(IV) are both converted ...
A: The reaction given is, => Given: Time passed = 5.00 hours = 5 × 60 × 60 = 18000 s ...
Q: O THERMOCHEMISTRY Calculating a molar heat of reaction from formation enthalpies 0/5 Using the table...
A:
Q: If you use 4.76 mol of sodium fluoride (NaF) and dissolve this into 3.62 L of water, what will be t...
A:
Q: 3) Aniline (B), shown below, is an organic base used in the manufacture of certain plastics. NH2 a) ...
A: Given, aniline is represented by B it is given that it is a base.
Q: 3. Using standard reduction potentials from Table L1 of Appendix L in your textbook: Chemistry: Atom...
A:
Q: A student ran the following reaction in the laboratory at 534 K: CoCI2 (g) co (g) + Cl2 (g) When she...
A:
Q: Two 25.0-ml. samples of unknown monoprotic weak acids, A and B, are titrated with 0.100 M NAOH solut...
A: The solution which is less concentrated ? The solution which has smaller Ka ?
Q: The following flow chart represents the solubility classification of substances. Drag and drop the p...
A: Sucrose (C12H22O11)is soluble in water but sucrose is a covalent molecule when it dissolves in water...
Q: 2N2O5(g) → 4NO2(g) + O2(g) rate constant, k=2.8×10−3 sec−1. If the initial concentration of [N2O5] ...
A: the concentration of N2O5 after 300 sec is given below
Q: Dinitrogen tetraoxide is a colorless gas at room temperature. It can dissociate into nitrogen dioxid...
A: 1.) We would check initial values of cin of N2O4 for each experiment. From column 2. 2.) , 3 ) , 4 ...
Q: The total pressure exerted by three gases (oxygen, hydrogen, and argon) inside a closed container is...
A: Total pressure P total = 103 atm Poxygen = 67 atm P hydrogen = 8.9 atm Pargon = to find.
Q: What is the boiling point of the substance modeled by this heating curve? F. 1501 135 120 D E 105 90...
A:
Q: Which of the chemicals is necessary for halogenation? a AlCl3 b SnCl2 c CuCl2 d NBS
A:
Q: If a solvent more polar than ethanol were used would you expect the SN1 reaction rate to increase or...
A:
Q: Calcium carbonate reacts with hydrochloric acid solution according to the reaction below: CaCO3(s) +...
A: Given :- CaCO3(s) + HCl(aq) → CaCl2(aq) + H2O(l) + CO2(g) mass of CaCO3 = 142.2 g actual yield of...
Q: Use the van der Waals equation of state to calculate the pressure P of 3.50 mol of Xe at 469 K in a ...
A:
Q: The solubility of a gas is 0.650 g/L at a pressure of 109 kPa. What is the solubility of the gas if ...
A:
Q: Will the aqueous solutions be acidic, basic, or neutral? a. Ca(CN)2 b. Fe(NO3)3
A:
Q: The burner in a gas grill mixes 24.0 volumes of air for every one volume of propane (C3H8) fuel. Giv...
A: Given : Air = 21% =0.21 (by volume) O2 Moles of propane = ?
Q: 13. Determine whether the following bonds and molecules are polar. Indicate the direction of the pol...
A: Check the polarity of the compound ---
Q: 4. Draw 3 resonance structures for each framework, indicate all formal charges, and circle preferred...
A:
Q: Give strucutre of products formed including stereochemistry if appropriate. If more than one product...
A:
Q: Sulfur trioxide is formed from the reaction between sulfur dioxide and oxygen: 2 SO2((g)) + O2((g) =...
A: Given reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g) We have to find what will happen to the equilibrium if the...
Q: An electrochemical cell involves the following half reactions: Bra(1) + 2e- 2Br(aq) E - +1.09 V Fe2*...
A:
Q: Listen Which of the following is not a property of an acid? O Turns blue litmus red Reacts strongly ...
A: The correct answer is given below
Q: . (a) A substitution reaction occurs when 2-bromopropane reacts with aqueous sodium hydroxide. (i) D...
A:
Q: What is the pH of a 0.350 M aqueous solution of methylammonium chloride, C5H5NHBr? The Kb of puridin...
A:
Q: The percent composition by mass of an unknown compound with a molecular mass of 120.104 u is 40.002%...
A: Given ; percentage of atoms
Q: СООН 12 2 1
A: Answer of this question :-
Q: Part A Consider the reaction: 2 O3 (9) → 3 O2(g) The rate law for this reaction is: What fraction of...
A:
Q: Calculate the pressure, in atmospheres, required to compress a sample of helium gas from 27.4L (at 1...
A: Boyle's law: According to Boyle’s law, the absolute pressure exerted by a given mass of an ideal ga...
Q: In organic chemistry, what should your first "move" be after studying phosphine, PH,? Select one: O ...
A: A multiple choice question based on introduction to organic chemistry that is to be accomplished.
Q: ) Calculate the pH, [H+] and (OH-] of a solution with a pOH of 5.36 e) What is the pH of a solution ...
A: Since you have posted question with multiple subparts as per guidelines we can answer three per sess...
Q: Match each statement with the solution (or solutions) it describes. Each statement could represent o...
A:
Q: 12.) Fuel engineers use the extent of the change from CO and H20 to CO2 and H2 to regulate the propo...
A: Given reaction: CO (g) + H2O(g) ⇌ CO2(g) + H2(g) Given, Kc = 1.56 The initial moles of CO = 0.250 m...
Q: equation, use the coefficient in the box to determine what color to Use TOF 1 = Red 2 = Pink 3 = Ora...
A:
Q: Identify the type of reaction below: 7Ag+ Og a) Ajuminum t chiorine → aluminum chioride 3) Cag (Po4)...
A: Identify the type of reaction below ---
Step by step
Solved in 3 steps
- A solution that may contain Cu2+ , Bi2+ , Sn4+ , or Sb2+ is treated with thioacetamide in an acidic medium. The black precipitate which forms is partly soluble in strongly basic solution. The precipitate which remains is soluble in 6 M HNO3 and gives only a white precipitate upon the addition of NH4OH. The basic solution, when acidified, produces an orange precipitate. Which group II ions are present? Which are absent? Which are in doubt? How would you remove all doubt?What is the percentage of Nickel in an ore if, when analyzed by the cyanide method, 20.00mL of KCN solution (containing 1.00mmol of AgNO3 per milliliter) are used? Wt of sample used = 0.2500gChromel is an alloy composed of nickel, iron and chromium.A 0.6472 g sample was dissolved and diluted to 250 mL. When a50 mL aliquot of 0.05182 M EDTA was mixed with an equal volumeof the diluted sample and all the three ions were chelated, a 5.11 mLback titration with 0.06241 M copper (II) was required.The chromium in a second 50 mL aliquot was masked through theaddition of hexamethylenetetramine, titration of the Fe and Nirequired 36.28 mL of 0.05182 M EDTA.Iron and chromium were masked with pyrophosphate in a third50 mL aliquot and the nickel was titrated with 25.91 mL of theEDTA solution.Calculate the percentage of nickel, chromium and iron in thealloy.
- An unknown salt X reacts with hot conc. H2SO4 to produce a brown coloured gas which intensifies on addition on copper turnings. On adding dilute ferrous sulphate solution to an aqueous solution of X and then carefully adding conc. H2SO4along the sides of the test tube, a brown complex Y is formed at the interface between the solution and H2SO4. Identify X andY and write the chemical equation involved in the reaction.a) Which ion, Pt(II) or Mn(II), is more likely to form a sulfide in the presence of H2S in water. b) Rationalize your answer with the trends in hard and soft character. c) Give a balance chemical equation from your reaction.The solid is treated with hot water giving a solid and a solution. The solution is treated with K2CrO4 and no precipitate forms. What is your conclusion?
- What wt. of impure calcite (CaCO3) should be taken for analysis so that no. of milliliters of CO2 obtained by treating with acid, and measured dry at 18°C and 763 mm pressure, will equal the percentage of CaO in the sample?A 0.7352g sample of ore containing Fe3+, Al3+ and Sr2+ was dissolved and made up to 500.00 mL. The analysis of metals was performed by a chemistry using complexation volumetry. Initially, an aliquot of 50.00 mL had its pH adjusted to 1.0 and titrated with a standard solution of EDTA 0.02145 mol/L, requiring 6.95 mL to reach the end point. Subsequently, another 25.00 mL aliquot was buffered at pH=5 and titrated with the same EDTA solution, requiring 6.24 mL to reach the end point. Finally, a third aliquot of 25.00 mL was titrated at pH=11, requiring 11.10 mL of the same EDTA solution to complete the titration. Determine the percentage of each of the metals in the sample Given the molar masses: Fe=55.845 g/mol; Al=26.982 g/mol and Sr=87.620 g/mol.Comparing the two quantities based on the given condition, which is greater I or II? or are they equal? can the quantities be measured? Consider the analysis of Fe in ore using permanganate as titrant. Under the same acidic conditions I. % Fe with pre-reduction II. % Fe without pre-reduction
- Which characteristic of a precipitate doesn’t do well for gravimetric analysis. a Readily filtered and washed free of contaminants b Of sufficiently high solubility (Ksp) c Unreactive with constituents of the atmosphere and high purity d Of known composition after it is dried or, if necessary, ignited. e None of the aboveCaustic potash that has been exposed to air is found on analysis to contain 90.00% KOH, 2.38% K2CO3 and 7.62% H2O. What weight of residue will be obtained if 1.00 g of this sample is added to 46.00 mL of 1.00 N HCl and the resulting solution, after neutralization with 1.070N KOH is evaporated to dryness?what wt. of limestone containing 9.57% Mg must be taken for analysis in order to precipitate of 0.551g Mg2P2O7? how many grams of Na2SO4 are required to ppte Ag2SO4 from 2.000t of AgNO3? a sample of magnetite (impure Fe3O4) weighing 0.5000g is fused with oxidizing flux and the ferric compound formed is eventually precipitated as ferric hydroxide and ignited to ferric oxide which weighs 0.4980calculate %Fe & %Fe2O3
