Q1. A 100 g soil containing 20% smectitie mineral matter was mixed with 150 mL solution containing 0.10 M Pb2+. CEC of pure smectitie is 110 cmol(+)/kg. CEC of the soil (cmol(+)/kg) is:
Q: As the atoms get closer together they attract one another and the potential energy decreases, as…
A:
Q: 1. How many grams of water are produced from 100 grams of oxygen?
A: Note: As per the guidelines, solution of first question has been made. For the expert solution of…
Q: The rate law for the reaction NO₂(g) + O₂(g) → NO(g) + 03 (g) = k[NO₂][0₂] is given by rate = k If…
A: According to the question we have a chemical reaction NO2(g) + O2(g) → NOg + O3g The rate…
Q: Problem 3: A compound with molecular formula MW (CsH100=86). The infrared spectrum shows a strong,…
A: IR spectroscopy is used to determine the functional groups present in the sample. Different…
Q: Q 1 the P-anisidie Compound is soluble in ☺ the Benzamide compound is soluble in
A:
Q: What is the meaning of the phrase "tare the mass of a piece of weighing paper?"
A: Weighing paper is used to weigh any solid compound using weighing machine in labs. It is always…
Q: What NaCl concentration results when 289 mL of a 0.710 M NaCl solution is mixed with 627 mL of a…
A: Given, There are two NaCl solution: I) First NaCl solution Concentration of the NaCl solution =…
Q: One day it was discovered that the waters of the lake were dead, estimated to be polluted Hg. How do…
A: A question based on concentration terms that is to be accomplished.
Q: A common reference electrode consists of a silver wire coated with AgCl(s) and immersed in 1 M KCl.…
A:
Q: MCC powder contains 86.6% proteins and WPI powder contains 93.4% protein. Calculate the amount of…
A: The amount of powder required can be figure out from the concentration of solution required.
Q: An analyst was measuring the performance of a HPLC column. The test solute was Toluene (5 µL). The…
A: To find out the mobile phase velocity, number of theoretical plates and height equivalent to…
Q: 8. Given the following equilibrium reaction: H2O(g) + CO (g) H₂ (g) + CO2 (g) K = 0.036 If 0.75 M of…
A: The given chemical equation is H2O (g) + CO (g) ⇔H2 (g) + CO (g) the value of equilibrium constant…
Q: half-life of the reaction is 31.0 s at 680 °C. art 1 of 2 Calculate the first-order rate constant…
A: Chemical kinetics is branch of chemistry in which we deal with speed at which rate of reaction…
Q: Is one anomaly enough to disprove a hypothesis? If not, how many are? Why is it important that…
A: A question based on tools in analytical chemistry that is to be accomplished.
Q: The indicator methyl red has a pKHIn = 4.95. It changes from red to yellow over the pH range from…
A: Given- pKHIn of indicator = 4.95 Colour of indicator at pH=4.4 - red Colour of…
Q: For the molecules below use formal charge to identify the specific atom(s) which hold indicated…
A:
Q: If you make 250 mL of a 20X stock solution on NaCl, how many grams of NaCl would you need in how…
A: Introduction To make a stock solution, weigh out the proper amount of a pure solid or measure out…
Q: Chemistry Can someone please explain how to find the concentration iron III thiocyanate ion (m)?
A: Iron(III) thiocyanate concentration of the stock solution, [FeSCN2+] = 0.000300 M The above stock…
Q: the constitutional isomer for pentane (CH) Write the expanded structural formula Isomer name: Write…
A: Organic compounds are compounds that are made up of carbon and hydrogen. Isomers are those which…
Q: Lance obtains a silvery metallic unknown. He weighs the metal and finds that he has 60.55g. When he…
A: Given - Mass of metal = 60.55 g Initial volume of water= 25.2 mL Final volume…
Q: In a dry test tube, put enough cane sugar to make a layer about 1⁄4 inch deep. heat the tube in the…
A: During the hearing process of cane sugar in test tube, sugar first melts, then turns brown, and…
Q: Draw a model of a nitrogen (N) atom. The atomic number of N is 7. How many electrons are in an…
A: Electronic configuration is defined as arrangement of electrons in shell, subshell and orbitals.
Q: Compound [Ni(CO)4] [Fe(CN)5] PROBLEM WORKSHEET B [Cr(OH)6] Coordination Charge on the number metal…
A: We are authorised to solve only first three subparts of a question. Please post rest of the subparts…
Q: The archeologist collected a sample for testing and learned that the carbon-14 activity was found to…
A:
Q: 23. Calculate AG (in kJ) for the following reaction at 25°C using the data in the table below.…
A:
Q: mcc powder contains 86.6% proteins and powder containg 93.4%. proteing. WPL Calculate the amount of…
A: MCC powder contains 86.6% protein, i.e. 100 g of MCC powder contains 86.6 g of protein Similarly,…
Q: The carbon-carbon bonds in benzene are: O a) Identical to the carbon-carbon bonds in cyclohexene Ob)…
A: 1) we have to identify the true statement regarding carbon carbon bonds in benzene
Q: A voltaic cell is constructed based on the following reaction and initial concentrations:…
A: Given, Fe2+(0.0050 M) + Ag2+(2 M) ↔ Fe3+ (0.0050 M ) + Ag(s)
Q: . How can the water displacement method be used to measure solid? the density of tan…
A: Water displacement method is a method that is generally used to calculate the volume of any solid .…
Q: In the molecule shown label the indicated bonds with either their hybridization (sp,sp2,sp3) or the…
A: Hybridization is the mixing and recasting of atomic orbitals of the same energy and symmetry to form…
Q: + 2,4-Dinitrophenylhydrazine ->?
A: Ammonia or ammonia derivative reacts with carbonyl compounds to give addition products.
Q: Draw the lowest energy alternative resonance structure for this compound. Interactive 3D display…
A:
Q: At a certain concentration of N₂ and H₂, the initial rate of reaction is 8.0 x 103 M/s. What would…
A:
Q: What is specific objectives in extraction of lycopene from watermelon.
A: Lycopene from watermelon can be extracted as follows:
Q: Consider a hypothetical chemical reaction: A+B C+D (In this equation A, B, C and D stand for some…
A:
Q: 3.4 nanograms per kilogram of water concentration:
A:
Q: The electrodes in the following electrochemical cell are connected to a voltmeter as shown. The…
A: When K2CrO4(aq) is added, it undergoes precipitation reaction with Ag+(aq) in the left half-cell.…
Q: . How can the water displacement method be used to measure solid? the density of tan…
A: To measure the density of a solid , we need its mass and volume .
Q: Gaseous ethane (CH₂ CH₂) reacts with gaseous oxygen gas (0₂) to produce gaseous carbon dioxide (CO₂)…
A:
Q: 3. olumlu sham Me Ph Ph Ph H NaOEt Ph
A:
Q: For the following isotope, selenium -77, indicate the number of protons, neurons, and electrons.
A:
Q: The rate constant k for a certain reaction is measured at two different temperatures: temperature k…
A: In the given problem we have given two different temperatures and two different rate constants. So…
Q: The relationship between [H+] and acidity? O Not related O Equal O Directly proportional Inversely…
A: We have been asked to find the relationship between acidity and [H+]
Q: are substances that release hydrogen ions. Question 3 options: a) Basic substances b)…
A: In solutions, basic substances release hydroxide (OH- )ions. Neutral substances have equal amount…
Q: Chromium has four naturally-occurring isotopes: 4.34% of 50Cr, with an atomic weight of 49.9460 amu;…
A:
Q: If 12.3 g of Cu is deposited at the cathode of an electrolytic cell after 5.50 h, what was the…
A:
Q: What is the hydroxyl ion concentration of a solution with pH 2.43?
A: pH + pOH =14 pOH = 14-pH pOH =14-2.43 =11.57
Q: How is the assigned buffer prepared? Write computations. Encircle the amount of solute needed for…
A: Answer : As pKa of H3PO4 are as below pKa1 =2.16 pKa2 = 7.21 pKa3 = 12.3 so we can use pKa2 to…
Q: Н OH2 H он, H + H2O +
A: In this step, H2O acts as a base. As a base, it abstracts a proton from the reacatnt.
Q: What is the partial pressure of CO2 (in atm) above a solution if if 8.86 g are dissolved in 371.7 mL…
A:
Step by step
Solved in 4 steps with 4 images
- : The aluminum ( aw = 27) content of a 5 g sample is determined gravimetricaly by precipitating the aluminum as ALS: (150 g/mol) . If the weight of the precipitate is 0.5 g , calculate the percentage of aluminum in Ans=3.6% %3D 6. the sample ?A 100 g soil containing 20% smectitie mineral matter was mixed with 150 mL solution containing 0.10 M Pb. CEC of pure smectitie is 110 emol(+)/kg. CEC of the soil (cmol(+)/kg) is:Precipitimetry The chloride in a 4.321-g food sample was precipitated through the addition of 50.00 mL of a standard AgNO3 solution (10.00 mL AgNO3 = 11.22 mL KSCN). The precipitate was coated with nitrobenzene and the mixture was diluted to 250.0 mL. A 50.00 mL aliquot was taken from the diluted solution and required 4.56 mL back titration with a %3D standard KSCN solution (22.33 mL KSCN = 0.9758 g AgNO3). %3D Formula Masses: AgNO3 = 169.87; CI = 35.45 Calculate the following: 1. Molar concentration of KSCN solution M %3D 2. Molar concentration of AgNO3 solution M %3D 3. % (w/w) chloride in the original sample =
- КНР (ад) + NаОН (ад)- - NAKHP (aq) + H20 (1) Trial V; (mL) V; (mL) 33.87 45.73 2 A student masses out 1.019 grams of KHP, which is dissolved in 25.00 mL of DI water. This KHP solution is titrated with NAOH, as shown in the equation above. Calculate the molarity of the NaOH solution. RE FS F6 F7 FB F10Approximately 6 mL of conc. perchloric acid ( 72% ) was transferred to a bottle and diluted with about 1 liter of water. A sample containing 251.5 mg of primary standard Na2B4O7.10H2O (Fwt= 382g/mol) required 27.41 mL of the HClO4 solution to reach the methyl red end point. What is the molar concentration of the HClO4 solution? Na2B4O7.10H2O + HClO4 ------------> NaClO4 H2B4O7.10H2OTo 47.62 ml of wine were added 5 mL of concentrated KI solution and 32.11 mL of solution containing (0.7557 g KIO 3)/(100.00 mL solution). The wine+reagent mixture was acidified with 10 ml of 1 M HCI to create a known number of moles of I 2 by the reaction 10 3 + excessl + some H*-> 31 2 Some of this I 2 immediately reacted with the sulfite in the wine sample by the reaction SO 3 +12 --> products we don't care about The left over I 2 was titrated to a starch end point with 10.14 mL of 0.04521 M thiosulfate solution, by the reaction 12+ 25 20 32-> products we don't care about What is the concentration of sulfite in the wine, expressed in mM?
- Q1: What is the density (g/ml) of a 3.6M Sulfuric acid solution that is 29% H,So, by mass (Mwt. = 98)? Q2: Fill the blanks with suitable answers 1: The is the thing being dissolved. ......... 2: The branches of quantitative analysis are and 3. The filterability of the precipitate depend on the of practices. Q3: Which one is correct? 1. Molality changes with temperatures. 2. Molality does not change with temperatures. 3. Molarity changes with temperatures. 4. Normality changes with temperatures. Q4: What weight of pyrite ore (impure FeS,) must be taken for analysis so that the BaSO, precipitate weight obtained will be equal to one-half that of the percent S in the sample? Note: Mwt. of Ba =32, Mwt. of BaSo4 =233, Mwt. of FeS, =119A solution of HCl was titrated against sodium carbonate. What is the average normality of acid in the given data? (MW Na₂CO3 = 106) T2 0.3479 0.3562 0.3042 Weight (g) Initial V (ml) 0.80 1.60 35.20 36.70 39.80 Final V (mL) Vol HCl used (mL) 35.10 39.40 N of HCl (eq/L) 0.1954 0.1870 Average N of HCl (eq/L)A 0.64 g sample containing KCI ( mw = 74.6 ) is dissolved in 50mL of water and titrated to the Ag2CrO4 end point, requiring 26.2 mL of 0.15 M AGNO3 * ? .The %w/w KCI in the sample is
- Molecular Weights: -Cu 63.546g/mol A rock was analyzed for its copper content. Since copper goes through redox reactions, an iodometric totration was utilized. An unknown 1.5098 g sample was acidified using 3M sulfuric acid to dissolve the Cu compounds and diluted w/ 30mL distilled water. Kl was then added resulting in 12 and Cul precipitate from Cu²+ (first reaction). I₂ then reacted with excess Ki resulting in 13 (second reaction) w/c was titrated with Na2S203 (third reaction). 17.600mL of the titrant was required in the solution to reach the starch end point. Before the the sample was titrated, the titrant was standardized by taking 50mL of 6.786e-3 standard KIO3 sol'n, acidifying and adding KI crystals. 9.8mL was required for the titration of this solution to reach starch endpoint. a. Give the concentration (M) of S₂O3² titrant. b. Give the copper content of the rock (%w/w). wwwwwww....Six iron tablets containing FeSO4.7H2O were dissolved in 100-ml of 0.1M HNO3 with gentle heating. All of the Fe2+ is converted to Fe3+ by the strong oxidizing conditions. After the solution had cooled to room temperature , 2.5-ml of 35wt% NH4OH was added. The precipitate Fe2O3-xH2O that was filtered weighed 0.345g. Thermogravimetric analysis of the crude product showed a 10.5% weight loss . A. How many waters of hydration were in the precipitate B. How much iron is present in each tableton in a 1. 200 Sample was precipi toled as the hdroxide and ignited to Ferm Fez0 (0. 352 1 FW= 159-7 lmal). Fnd %Fe (AW : 55-8 glmal)in the Sample. 4 A 2-560 g of impure CCl, Sample was disselved in water and precipitated wii th excess Na Cou Selution. 1F i.245g CaGOu (FW= 12891ml) was obtained, what is the percentage f Cack (FW= mglmal) in the impure Sample? Cu: A 0-21219 sample of an organic Compound was and the Ce, was burned in a stream of oxygen, and the CO2 was Callected in a solution of BalOH), Caleulate the %C in the Sample if o.co06 g of Ba COg was hamedd (FW Ba CO, = 197.34g mol), (AW C=12 glm)