-0.500 g sample consisting of NazCO3, NaHCO3, and inert materials was dissolved in sufficient vater to give 250.0 mL of solution. A 25.00 mL aliquot of this solution was boiled with 50.00 ml of 0.01255 M HC. Titration of the excess HCl to a phenolphthalein endpoint required 2.34 mL of 0.01063 M NaOH. The carbonate species in the second 25.00 mL aliquot was precipitated with an excess of BaCl, and treated with 25.00 mL of the NaOH. Titration of the excess base required 7.63 ML of the standard acid. Calculate % Na2CO3 and NaHCO3 in the sample.
Q: Propose a plan to synthesize 2,2,3-Trimethylpentan-3-ol. Explain.
A:
Q: Gyuri performed an analysis of Simvastatin tablets. The following are the data she obtained: 39.5 m...
A: The reading data for various experiments are given as, => 39.5 mg, 41.2 mg, 40.7 mg, 38.9 mg, 42....
Q: Draw the electron dot formula and the structural formula for a molecule of SiO2
A:
Q: For the n=4 shell, rank the sub shells in order from lowest to highest energy
A: The correct answer is given ?
Q: 2. A sample of material contains for its active components NaOH, NazCO3, NaHCO3, or compatible mixtu...
A:
Q: NaSH Br 1) Hg(OAc)2, CH3CH2OH 2) NABH4 CH;CH,CH,Br
A:
Q: 3. Determine the formula weights of the following compounds: a. N2O5 b. FeCO3 c. Ca(C2H3O2)2 d. (NH4...
A: Formula weight of a molecule is the sum of the atomic weights of the all atoms present in empirical ...
Q: 15. How does the magnitude of the postsynaptic potential change as Cl- permeability increases? The p...
A: The correct option is:
Q: You will be varying the initial amounts of Fe" and SCN Iin Part B What is your hypothesis for how th...
A: Reaction is : Fe3+ + SCN- → [FeSCN2+]
Q: What is the melting point of a solution prepared by dissolving 25.0 g of KBr (Mm = 119.00 g/mol) in ...
A: Colligative properties: The colligative properties are those properties of solutions that depend on ...
Q: * (b) 1. LİAIH4 (1 mol) 2. H-О NABH4, MEOH lithium aluminum hydride followed by water H2 with Pt, Pd...
A:
Q: A solution of acetic acid CH3COOH, on a laboratory shelf was of undetermined concentration. If the p...
A: NOTE: As per our guidelines we are supposed to answer only one question when multiple questions are ...
Q: How are polyiodides synthesized and characterized?
A: The polyiodides are a class of polyhalogen anions which is consist of the only iodine atoms.
Q: A chemist,, Wishes to prepare 100.0 mL of a buffer of pH 10.0000 using the base methyl amine, CH,NH2...
A: Since you have posted multiple questions, we are entitled to answer the first only. 1) Given: Volume...
Q: The IUPAC name for (CH3)2CHCH(CH3)CH2CH=DCH2 is Nama IUPAC untuk (CH3)2CHCH(CH3)CH2CH=CH2 ialah
A:
Q: 1. Provide acceptable IUPAC names for the following compounds. D- stereochemistry if needed. CI- CI ...
A:
Q: the following data were obtained: [HI], M seconds 2.46 1.23 0.615 0.308 408 1.22x103 2.85x103 Hint: ...
A: The Half-life of the reaction is the time required to be the concentration half of the initial conce...
Q: a. Calculate the quantity of moles of NH3 gas that form when 4.20 mol of N2H4 liquid completely reac...
A:
Q: How many Kr atoms are there in a 12.7 gram sample of Kr ? atoms Submit Answer Retry Entire Group 8 m...
A: Given mass of sample of Kr = 12.7 g
Q: At 35°C, K = 2.0 x 10-5 for the reaction 2 NOCI(g) = 2 NO(g) + Cl2 (g) Calculate the concentrations ...
A: GIVEN :- Reaction constant ,K = 2.0 × 10-5 Temperature = 35℃ = 308K
Q: Identify the false statement with regard to electromagnetic radiation and the electromagnetic spectr...
A:
Q: 5. A 300.0 mg sample containing Na,CO3, NaHCO3 and NaOH and inert material either alone or in some c...
A: Introduction : It is given that sample which containing Na2CO3 , NaHCO3 and NaOH and are some inert...
Q: PART B: For each of the following organic compounds, draw the structural or line diagram and circle ...
A:
Q: Morphine has a very long half-life due to its active metabolite that undergoes what process?
A: Morphine has a very long half-life due to its active metabolite.
Q: 0 Calculate the ionic strength for a solution containing 0.01SM NaCl and 0.0ZM CaSO Estimate the act...
A: A question based on ionic equilibrium that is to be accomplished.
Q: Tools Add-ons Help Last edit was 4 minutes ago 4. Cu AgNO,- Cu(NO,)2 Ag Balanced Equation: Reaction ...
A: Balancing a chemical reaction involves making the number atoms equal on both sides of reaction
Q: Determine the rate law and the value of k for the following reaction using the data provided. S20g2-...
A:
Q: Consider this metal complex: 3- F он OH Cr F OH OH Complex A Now decide whether each complex in the ...
A:
Q: A solution containing 0.15 M sodium ascorbate, NaC6H7O6, has a pH of 8.65. What is the Kb for the as...
A: Given: Concentration of NaC6H7O6 = 0.15 M And pH of solution = 8.65
Q: Calculate %Na2CO3 in the sample.
A: Na2CO3 reacts with 2 mol of HCl to generate 2 mol of NaCl along with CO2 and H2O. So, 1 mol Na2CO3 :...
Q: HO CH3(CH2)16 CH2 CH2 3 NaOH 3 CH3(CH2)16 + Na но CH H,O CH3(CH2)16 CH Sodium salt of CH2 stearic ac...
A:
Q: What is the difference between the excitation and emission spectrum?
A: The excitation spectrum look similar if not identical to the absorption spectrum obtained in UV/VIS ...
Q: Write real life application examples of isostatic, syndiotactic and atactic configurations
A:
Q: A 2.0 g of MgCO3 was dissolved and diluted to exactly 500-mL volumetric flask. If 50-mL aliquot was...
A: Mass of MgCO3 = 2g Mol. Mass of MgCO3 = 84g/mol Volume of dilution = 500ml Volume of aliquot = 50ml ...
Q: A 3.750 g sample of the compound responsible for the odor of cloves (containing only C, H, and O is ...
A:
Q: 2. Twenty-five mL of 0.100 M lactic acid (K, = 1.4 x 104) is titrated with 0.097 M KOH. %3D a) What ...
A: Given volume of lactic acid is 25mL and strength is 0.100 M. Given strength of KOH is 0.097 M. We ha...
Q: Only need solution of 3rd part. Ans: 10 isomers (Please send their structures)
A: For the coordination compound pentaaminenitritocobalt(III)nitrate we have to write the number of iso...
Q: Directions: Explain your answer comprehensively. Limit your justification in 3-5 sentences. 1. All H...
A: According to Hess's Law of Constant Heat Summation The total enthalpy change for the reaction is the...
Q: A mixture is made by combining 110 mL of 0.015 M HCl and 215 mL of 0.025 M HI. What is the pH (answe...
A:
Q: Aqueous solutions of silver nitrate and sodium phosphate are mixed together, forming solid silver ph...
A: Soln
Q: An ionic bond is formed by the combination of positive and negative ions. (b) An ionic bond between...
A: Note: As per our guidelines, we are supposed to answer only the first question (i.e. part (a) to (i)...
Q: This drug is likely to bind to what protein? 2. Identify the classification of this drug 3. Name t...
A:
Q: Write the Oxidation number of the following: a. Phosphorus atom in P4 b. Aluminum in Al3+ c. Chlo...
A: Sum of oxidation numbers of all atoms in a neutral molecule is equal to Zero. Sum of oxidation numbe...
Q: Dissolving 28 g of an unknown into 100 g of water lowered the freezing point fro 0.0 C to - 3.8 C. W...
A:
Q: (a) The distillation stops at one point, and the temperature drops. (b) The material in the...
A: Distillation is a process of separating mixture of liquids depending up on their different boiling p...
Q: he half-life of radioactive Bk-248 is 23.7 h. How long does it tak
A: Radioactive decay follows the first order kinetics its decay constant λ = 2.303t log NoNwhere...
Q: staggered conformation. blicitly shown are in the 1. Torsional strain 2. Angle (ring) strain 3. Ster...
A: Cyclohexane exist in two forms : Chair form and boat form. Chair form is more stable form.
Q: 2I– (aq) + H2O2 (aq) + 2H3O + (aq) → I2 (aq) + 4H2O (l) (slow) C6H8O6 (aq) + 2H2O (l) + I2 (aq) → C...
A:
Q: FeO CaS NaCl Ag,S CuBr, Col3 ZnO Be,N2 K,P NaCl
A: Formula Name FeO Iron (II)oxide (wustite) NaCl Sodium chloride (Common salt) CuBr2 Copper(II)B...
Q: Question: 1, Based on Beer-Lambert law, A = ɛ. c. L, where A, absorbance; ɛ, extinction coefficient;...
A:
Step by step
Solved in 3 steps with 2 images
- A 2.1562 g sample that may contain NaOH, NaHCO3 and Na2CO3 alone or in compatible mixtures reqıires 31.2 ml of 0.1082 M HCl for titration to the phenolphthalein end point and additional 52.4 ml of the same acid to bromocresol green end point. Calculate the percentages of compound(s) in the sample (M. Mass of NaOH:40 g/mol, M. Mass of NaHCO3: 84.01 g/mol, M. Mass of Na2CO3: 105.99 g/mol)?A solution contains both NaHCO3 and Na2CO3. Titration of a 50.00 mL portion to a phenolphthalein end point requires 21.25 mL of 0.1385 M HCl. A second 50.00 mL aliquot requires 45.48 mL of the HCl solution when titrated to a bromocresol green end point. Calculate the molar concentration of Na2CO3 in the original solution. (Do not include the unit for molarity. Enter your answer to three significant figures.)A 0.6000 g sample contains NaHCO₃, Na₂CO₃ ,and NaOH, either alone or in permissiblecombination. Titration of a 50.0-mL portion toa phenolphthalein end point requires 24.27mL of 0.100 M HCl. A second 50.0-mL aliquotrequires 51.11 mL of the HCl when titrated toa bromocresol green end point. Deduce thecomposition, and calculate the percentcomposition of the substances in the sample.
- A sample may contain NaOH, NazCO3 and NaHCO3, alone or in some combination, along with inert material. A samplewitha mass of 857.6 mgwas dissolved and titrated with0.1163 M HCI. The volume of HCl used from 0 to methyl red endpoint (Phenolphthalein endpoint was not monitored here) was found to be 36.54 mL. Another 228.8 mg portion of the sample was titrated to the phenolphthalein endpoint and 10.82 mL was used up for this titration. a. What is the composition of the sample? b. Calculate the percentage of each of the component present.3) In the treatment of myasthenia gravis, 10 mg of guanidine (NH-C(NH2)2) per kilogram of body weight is given. Nitrogen in a sample with a total mass of 7.50 g and containing 4 tablets is converted to ammonia by Kjeldahl decomposition. It is then distilled into 100 mL of 0.1750 M HCI. Performed analysis; titration of excess acid with 11.37 mL of 0.180 M NaOH solution. Accordingly, in which option is the number of tablets at the appropriate dose given for a 48 kg patient? (C-12.0 g/mol; H=1 g/mol; N = 14.0 g/mol; Cl=35,5 g/mol) a) 3 b) 6 c) 9 d) 12 f) 15A 0.5000 g sample contains NaHCO₃, Na₂CO₃ ,and NaOH, either alone or in permissiblecombination. Titration of a 50.0-mL portion toa phenolphthalein end point requires 25.1 mLof 0.100 M HCl. A second 50.0-mL aliquotrequires 50.2 mL of the HCl when titrated to abromocresol green end point. Deduce thecomposition, and calculate the percentcomposition of the substances. Find the mmol of Na2CO3, g of Na2CO3, and concentration of Na2CO3.
- 2.413 g sample contains Na2CO3, NaHCO3 and inert material. This sample was solved in water and diluted to 250.0 ml. 80 ml solution was taken and titrated with 0.09644 N HCl with the indicator of phenolftalein. 6.13 ml HCl was consumed. From a second solution, again 80 ml was taken and titrated with the same HCl solution with the indicator of methylorange. 15.4 ml HCl was consumed. Calculate the percentage of NaHCO3 and Na CO in sample (Na CO =106.0 g/mol, NaHCO =84.02 g/mol)The Merck Index indicates that 10 mg of guanidine,CH5N3, may be administered for each kilogram of bodymass in the treatment of myasthenia gravis. The nitrogenin a 4-tablet sample that had a total mass of 7.50 g wasconverted to ammonia by a Kjeldahl digestion, followedby distillation into 100.0 mL of 0.1750 M HCl. Theanalysis was completed by titrating the excess acid with11.37 mL of 0.1080 M NaOH. How many of thesetablets represent a proper dose for a patient who weighs(a) 100 lb, (b) 150 lb, and (c) 275 lb?A sample with a mass equal to 0.7500 g may contain NaHCO3, Na2CO3 and/or NaOH. The sample was dissolved and titrated with a 0.1090 mol L-1 HCl solution, spending 23.00 mL to reach the phenolphthalein end point and another 15.00 mL to reach the methyl orange end point. a) Deduce the composition of the sample b) Calculate the % (w/w) of the components. Data: Na = 22.99 O = 16.00 H = 1.008 C = 12.01
- 3. A sample may contain NaOH, NaHCO3 and Na2CO3, alone or in some combination along with inert material. A 567.8 mg sample was dissolved and titrated with 0.1503 M HCl 23.14 mL of HCl was used to reach the phenolphthalein endpoint and an additional 16.90 mL to reach the methyl red end point. a) What are the composition of the sample? b) Calculate the percentage of each titrated component.A sample containing both HCl (FW 36.45) and HNO3 (FW 62.98) had a density of 1.083 g/mL. A 10.00-mL aliquot of this sample required 26.22 mL of 0.1163 M NaOH for titration. Another 10.00-mL aliquot of the sample required 13.36 mL of 0.1216 M AgNO3 for titration. Calculate the % HNO3 in the sample.Zhongli is a speleologist tasked to analyze the CaCO₃ content of a limestone stalactite. A 5.0000-g sample was dissolved in 25.00 mL of 1.350 M HCl, it was then heated to expel any CO₂ formed. The excess HCl was titrated to a phenolphthalein end point, it used 37.50 mL of 0.1200 M NaOH. What is the reaction for the digestion of the limestone sample A. 2 NaOH + CaCO₃ ⇌ Na₂CO₃ + Ca(OH)₂ B. CaCO₃ ⇌ CaO + CO₂ C. 2 HCl + CaCO₃ ⇌ CaCl₂ + H₂O + CO₂ D. NaOH + HCl ⇌ NaCl + H₂O