Which of the following statements is TRUE about elimination tests for anions? of Select one: SCN' in the presence of acidified Fe(NO3)3 and toluene will| result to the formation of a blood-red organic layer. Addition of Ba(NO3)2 to the anion test solutions will provide positive results for CO3², PO4³, and NO3" In the elimination tests that involve toluene, the aqueous layer is on top of the organic layer.
Q: 2NO2(g) → 2NO(g) + 02(g) It follows this reaction mechanism: NO,+NO 2NO+O2 2NO2 Progress of reaction...
A:
Q: 2. If a sample known to be about 17190 years old has 400 carbon-14 atoms, how many atoms were in the...
A: When organism died absorption of C-14 stops and starts diminishing. The radioactive decay follows fi...
Q: If a red and green solution are mixed and an orange mixture esults, is this evidence of a physical c...
A: Physical change is the change in which physical property of the compound changes and it is reversibl...
Q: Ethylene (CH,CH,) is the starting point for a wide array of industrial chemical syntheses. For examp...
A:
Q: Explain the correlation between the structure of the compounds (b-Carotene, chlorophyll ) and the po...
A: Atomic Structure and PolarityThe designs of the significant parts are given beneath. Note that the ...
Q: i. 4-ethoxy-2-methyl-hex-1-ene j. 3-isopropoxy-butan-1-ol
A: Given, i) 4-ethoxy-2-methyl-hex-1-ene j) 3-isopropoxy-butan-1-ol
Q: In general, native (folded) proteins are in equilibrium with denatured (unfolded) forms: Protein(fol...
A:
Q: What is the ph of 0.6M acetic acid?
A:
Q: If you calculated the molar mass of your unknown liquid to be 70.1 g/mol, which of the following do ...
A: Given-> Calculated molar mass of unknown liquid =70.1 gm/mole.
Q: A pictorial representation of an electronic configuration is shown. Give the full electron confi...
A: Given, Based on pictorial representation of an electronic configuration the name of the element is ...
Q: H,SO4 (A) -OH но 180° K,Cr,0,, H,SO4 (B) он (F) (E) (D) (C) \KMNO4, NaOH, Hz0 PCC, pyridine sodl, py...
A: Since you have asked a question with multiple sub-parts, we will solve the first three sub-partts (A...
Q: 25
A: Calculate the standard enthalpy change for the reaction ., 2C8H18 (l) + 17O2 (g) -> 16CO (g) + 18...
Q: what is the mass of calcium carbonate reacted?
A: Given, Mass of marble before reaction 3.0g Mass of marble after reaction 1.8g
Q: A reaction occurs between hydrogen gas and chlorine gas. This causes their container to expand from ...
A: Given that, The amount of work done in the reaction, W = 14 J Let the container expand from V1 to V...
Q: Decide whether each molecule or polyatomic ion is polar or nonpolar. If the molecule or polyatomic i...
A:
Q: Calculate the mass of excess reagent remaining at the end of the reaction in which 90.0 g of SO2 are...
A: To find the limiting/excess reagent, • Convert the mass of reactants ( SO2 and O2 ) to moles. • D...
Q: Which of the following statements is TRUE about elimination tests for anions? Select one: O a. NO; i...
A: Anionic analysis refers to identification of anions present in the salt mixture. Various anions pres...
Q: Please type this, dont write it on a paper.
A: Here we have to give reasons for endothermic or exothermic to be more spontaneous. Which have more t...
Q: 0.0984g of an unknown chloride is dissolved in water a solution of silver nitrate is added an 0.2290...
A: Weight of unknown chloride=0.0984g Weight of silver chloride=0.2290g
Q: Enter your answer in the provided box. Calculate the standard entropy change for the following react...
A:
Q: points? I. The end point of a titration is reached when the titrant and analyte are stoichiometrical...
A: Equivalence point is defined as the point where the concentration of titrant is equivalent to the co...
Q: 15) How many moles of 0 atoms are in 2.5.19 of CaSO,?
A:
Q: Describe the effects of cooling an exothermic reaction at equilibrium.
A: Given it's a exothermic reaction.
Q: Given that pKa = 4.72 at 25 °C for HN3, what is the pH of 0.125 mol L-1 NaN3(aq) at 25 °C? What is t...
A: A question based on equilibrium concept that is to be accomplished.
Q: Question A sample of water with a mass of 662.8 g undergoes a temperature change from 81.40°C to 18....
A: Concept is based on calorimetry:
Q: Be sure to answer all parts. Predict the sign of the entropy change for each of the following proces...
A:
Q: what is the number of moles of calcium carbonate reacted?
A:
Q: The names and chemical formulae of some chemical compounds are written in the first two columns of t...
A: Ionic compounds dissolve in water to form cations and anions. In the aqueous solution, the concentra...
Q: QUESTION 1 During an experiment, a student mixed 14.5 mL of a 0.500 M sodium fluoride solution with ...
A:
Q: Which of the following statements is TRUE about elimination tests for anions? Select one: a. NO3 in ...
A: Anionic analysis refers to identification of anions present in the salt mixture. Various anions pres...
Q: A chemical reaction takes place inside a flask submerged in a water bath. The water bath contains Du...
A: heat flows from out of the flask means heat given out by the reaction and that heat is taken by the ...
Q: Enter the number of electrons in each energy level (shell) for each of the elements. If the energy l...
A: Enter the number of electrons in each energy level (shell) for Hydrogen element.,
Q: Calculate the change in pH that results from adding 0.160 M NaNO3 to 1.00 L of 0.160 HNO3 (aq).
A:
Q: Noting the curved arrows, draw all the product(s), organic and inorganic, of the following reaction....
A:
Q: How many protons, neutrons, and electrons are there in a neutral atom of 113In (indium-113)?
A: Atomic number of indium = 49 Atomic mass of indium = 113
Q: Mercury is present in Lake Miramar at a total concentration of 20.4 ng/L. Lab tests suggest an avera...
A: The partition coefficient can be calculated as: K=CHg×CpCdissolve (1) Where CHg is the conc...
Q: Consider the following reactions and associated equilibrium constants: A(g) C(g) K. = 1.700 *104 D(g...
A: Answer: This is the question based on the in depth understanding of equilibrium constant expression.
Q: Which of the following occurs when reactants are removed from a chemical reaction in solution or the...
A: According to lechatliers principle when a system at equilibrium is subjected to a stress (change in ...
Q: Mass of beaker 50.5g Mass of marble before reaction 3.0g Mass of marble after reaction 1....
A: Formula of marble CaCO3 Chemical reaction CaCO3 (s) + 2 HCl (aq) →CaCl2 (aq) + CO2 (g) + H2O (l) M...
Q: Activity 2. Complete the table to prepare the given solutions with different concentrations: Mass So...
A: Molarity = Mass / Volume (L)
Q: Which of the following statements does NOT explain why KHP is a suitable primary standard in an acid...
A: KHP is a suitable primary standard in an acid-base titration. Here we have to find out the stateme...
Q: For the ion given below: NO2- 1. Draw the Lewis Dot structure for the ion on a paper and write the...
A: Lewis structures of NO2-.
Q: Decide whether each molecule or polyatomic ion is polar or nonpolar. If the molecule or polyatomic i...
A:
Q: the isommeric fonship between tne mo Your choices are dieastereomers, enantiomers, identical, or con...
A: Isomers are compounds which have same chemical formula or numbers of atoms but differ in structures ...
Q: Pentaborane BgHg(s) burns vigorously in 02 to give B203(s) and H201). Calculate AHrxn for the combus...
A:
Q: A certain shade of blue has a frequency of 7.21 x 1014 Hz. What is the energy of exactly one photon ...
A:
Q: An 93.1 mL sample of "wet" O2 (g) is collected overwater at 21.4oC and a barometric pressure of 755 ...
A: Here we have to use Daltons law of partial pressure. And to calculate the volume percent we need to ...
Q: Draw the structure of the product/s in each of the following rea Provide your final answers in the s...
A:
Q: Given the standard heats of formation for the following compounds, calculate AH 208 for the followin...
A:
Q: nat No 1beat NANO3 Sodum Belves) Berylwm Aihake (NO:]* NäPO BPOe [PO4]3- Na Ton [SO:]? S05 Beat Sodu...
A:
[8] Please answer this one with explanation
Step by step
Solved in 2 steps
- A pink solid has the formula CoCl3 5NH3 H2O. A solution of this salt is also pink and rapidly precipitates 3mol AgCl(s) on titration with silver nitrate solution. When the pink solid is heated, it loses 1mol H2O to give a purple solid with the same mole ratio of NH3:Cl:Co as the pink solid. The purple solid releases two of its chloride ions rapidly; then on dissolution and titration with AgNO3, release one of its chloride ions slowly. Deduce the structures, draw and name 2 octhahedral complexesA 0.951-g sample containing (NH4)2C2O4 and compounds was dissolved in water and made alkaline with KOH. The liberated ammonia was distilled into 50.00 mL of 0.1007 N H2SO4. The excess H2SO4 was back titrated with 11.13 mL of 0.1214 N NaOH. Calculate the percentage of nitrogen in the sample.After titration, weight percent of oxalate in K3[Fe(C2O4)3] (MW: 437.2 g/mol) sample was determined to be 55.8%. What is the percent error of oxalate content determination?
- A 0.4755g sample containing (NH4)2C2O4 and inert materials was dissolved in H2O and made strongly alkaline with KOH, which is converted NH4+ to NH3. The liberated NH3 was distilled into 50.00mL of 0.05035 M H2SO4. The excess H2S04 was back-titrated with 11.13 Ml of 0.1214 NaOH. Calculate the %N in the sample. Hint: Determine the moles of titrant consumed via using the prepared titrant and subtracting the equivalent moles used in back-titration.Give a list of laboratory apparatus and equipment that are to be utilized for the preparation of 500 mL of 0.2 M K4 Fe (CN) 6. Also give the procedure of preparation.Explain why colour of KMnO4 disappears when oxalic acid is added to its solution in acidic medium.
- 2. An iron ore was analyzed by dissolving a 1.1324 g sample in concentrated HC. The resulting solution was diluted with water, and the iron(III) was precipitated as hydrous oxide Fe,03 .XH20 by the addition of NH3. After filtration and washing, the residue was ignited at a high temperature to give 0.5394 g of pure Fe,03 (FW = 159.69). Calculate (a) the percent Fe (FW = 55.847) and (b) the percent Fe;04 (FW = 231.54) in the sample.The digestion of a 0.1432 g sample of a compound containing phosphorous in a mixture of HNO3 and H2SO, resulted in the formation of CO2, H2O and H3PO4 Addition of ammonium molybdate yielded a solid having the composition (NH)3PO, 12M0O3 (MW=1876.3 g/mol). This precipitate was filtered washed, and dissolved in 50 00 mL of 0.2000 M NaOH: (NH,)3PO4-12MO03(s)+ 26OH (aq) HPO,2 (aq) +12M00,2 (aq) +14H2O(1) + 3NH3(g) After the solution was boiled to remove NH3, the excess NaOH was titrated with 14.71mL of 0.1741 M HCI to a phenolphthalein end point (back titration). Calculate the percentage of phosphorous in the solid sample. 6.19% 10.6% O 27.6% O0 238% O 19.5Chromel is an alloy composed of nickel, iron and chromium. A 0.6553-g sample was dissolved and diluted to 250.0 mL. When a 50.00-mL aliquot of 0.05173 M EDTA was mixed with an equal volume of the diluted sample, all three ions were chelated, and a 5.34-mL back titration with 0.06139 M copper (II) was required.The chromium in a second 50.0-mL aliquot was masked through the addition of hexamethylenetetramine; titration of the Fe and Ni required 36.98 mL of 0.05173M EDTA. Iron and chromium were masked with pyrophosphate in a third 50.00-mL aliquot, and the nickel was titrated with 24.53 mL of the EDTA solution. Calculate the percentage of Cr in the alloy. Express your answer in 2 decimal places.
- 5. 0.1500 g sample of chromium ore was dissolved and the chromium oxidized to chromate ion. The solution was treated with 25.00 mL of 0.3500 M AGNO3. The resulting precipitate, from the reaction of the excess and analyte in 1: 1 mole relationship, Ag2CrO4 was removed and discarded. The excess AGNO3 required 30.50 mL of 0.200 M KSCN for titration in a 1:1 mole relationship. Calculate the % Cr2O3 in the ore if the mole relationship between Cr2O3 and CrO42- is 1:2 respectively.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?Sometimes it is not possible to indicate the end point of a titration.a) How can one proceed then and what is the name of the type of titration that can be performed? Briefly describe. An example in which this method can be used is in the determination of mercury, which forms strong complexes with EDTA, but for which there is no suitable indicator that can indicate the end point. b) You are given the task of determining the Hg2 + concentration in a sample solution? After adding an excess of EDTA, the sample solution is titrated with a magnesium solution. 20.00 ml of a 0.0452 M EDTA solution was added to 30.00 ml of sample solutionThe excess EDTA was determined by adding 0.0500 M Mg 2+ solution, consuming 4.37 ml to the end point.