A solution was prepared by dissolving 118.9 mg of K2C12O7 in 1.000 L of water. A 10.00 mL aliquot was transferred to a 100.0 mL volumetric flask and diluted to the mark. The dilute solution had an absorbance of 0.206 at 400 nm, in a 1.00 cm cell. a. What is the concentration of the dilute solution in ppm? b. Using Beer's Law equation, calculate the molar absorptivity of K2Cr2O7
Q: Question 31 All of the following are assumptions in Beer-Lambert's Law, EXCEPT: O A. Path length is ...
A: According to Beer Lambert law, absorbance of a substance is directly proportional to path length and...
Q: Determine the formula weight of Ca 3(PO 4) 2- O a. 135 amu O b.310 amu O c. 215 amu O d. 279 amu O e...
A: The compound given is Ca3(PO4)2.
Q: what is the name of the hydrocarbon?
A:
Q: For the given compound ... a) Identify the 2 structures given as Blank 1 from the given 2 options (s...
A: Answer: Structural isomers are the compounds, those have same molecular formula but different struct...
Q: Write structural formulas for the following compounds: a. 2-chlorobutane 2,3-dimethylbutane 1,3-dich...
A: (a)
Q: The proton with the lowest delta value (the most shielded) is: The proton with the highest delta val...
A: NMR spectroscopy is branch of chemistry which deals with the shielding and de shielding nature of pr...
Q: Part E Given the data calculated in Parts A, B, C, and D, determine the initial rate for a reaction ...
A:
Q: Sodium hydrogen carbonate (NaHCO,), also known as sodium bicarbonate or "baking soda", can be used t...
A:
Q: number assigned to a carbon atom to indicate the position of a substituent in the parent compound ...
A:
Q: The following chemical reaction HI(g) + CH;I(g) CH,(g) + 1(g) - is characterized by the experimental...
A: From the given table : Activation energy of the reaction = ?
Q: A sample of dry gas weighing 3.1134 grams is found to occupy 3.650 L at 22.0°C and 740.0 mmHg. How m...
A: We have to predict the moles of the gas .
Q: 375 370 365 360 355 350 345 340 0.1 02 03 04 05 0.6 0.7 0.8 09 A A. Mole fraction B What is the esti...
A: Note: Please plot this figure on a graph paper, you will get accurate value of boiling point 351K.
Q: A sample of 1.00 mol of perfect gas molecules with Cp = 7/2 R is put through the following cycle: (...
A:
Q: The following reaction is performed using 8.75 g of Fe2O3 and 4.75 g of Al. Fe2O3 (s) + 2 Al (s)...
A: Given, Fe2O3 (s) + 2 Al (s) ➝ Al2O3 (s) 2 Fe (s) Mass of Fe2O3 reacts = 8.75 g Mass of Al react...
Q: Name the given compounds. For uniformity's sake, name all the branched substituent as if naming an a...
A: The structural formula of a molecule furnishes information about the parent functional present in th...
Q: The carotenoids have antioxidant properties, and they are commercialized as food colorants, animal f...
A: Carotenoids, also called tetraterpenoids, are yellow, orange, and red organic pigments that are prod...
Q: (a) Balance the following using the half reaction method. PO33-+ CIO4 =PO43-+ Cl" ...in base
A: Since you have posted multiple questions, we are entitled to answer the first only. a) The reaction ...
Q: Isomers with the same boiling point and molecular weight but have different boiling points how is th...
A: Given statement is : Isomers with the same boiling point and molecular weight but have different boi...
Q: Use this information to write a rate law for this reaction, and calculate the value of the rate cons...
A: Rate of reaction = k * [H2]^a * [I2]^b k = Rate constant a,b: Order of reaction
Q: pKa's: 2
A: Given as, pKa 1=2.19,pKa 2=6.94,pKa 3=11.51. As per rule, allowed to answer one question and post th...
Q: Sherlock Holmes is restoring an art artifact. He proceeded by diluting nitric acid to 1.8 M, 0.25 M,...
A: Given, a). Concentration of HNO3 in first solution = 1.8 M b). Concentration of HNO3 in second sol...
Q: Name the given compounds. For uniformity's sake, name all the branched substituent as if naming an a...
A: IUPAC nomenclature rules : 1. Choose the longest chain , 2. Numbering starts from substituents s...
Q: ОН Pi-delocalization A Present B) Absent
A: ★ Answer : pi-delocalization (A) Present • A delocalized π bond in which the electrons are free to...
Q: How many (NH4)2CO3 formula units are there in 16.9 g of (NH4)2CO3? Enter your answer using the follo...
A:
Q: You are asked to find the pH of each solution described below. A 0.50 M solution of HBrO3 A 0.030 ...
A: The compound completely dissociate to form H+, then is called strong acid .Where the compound comple...
Q: Which part in the figure can be a photovoltaic cell, phototube or photomultiplier tube? A O O O
A:
Q: Identify the compound PBR3 as a strong, weak, or nonelectrolyte upon diss in water. Strong electroly...
A: Nonelectrolyte is a substance that doesn't ionise on dissolving in water.
Q: 1. Write structural formulas for the following compounds: а. 2-chlorobutane 2,3-dimethylbutane 1,3-d...
A:
Q: what intermoleculor forces does CS2 have
A: Interpretation - To tell what intermoleculor forces does CS2 have - Introduction- Intermolecu...
Q: Which of the following monochromator terms is NOT correctly defined? O refraction: scattering of lig...
A: Question 10 A mochromatic ( mono = single) light is a light with a single wavelength or frequency ...
Q: 1.CH,Mgfe, THE 2.H F D.
A: Grignard reagent is the source of nucleophilic which undergoes nucleophilic addition reaction.
Q: 0.030- 0.025- 0.020- 0.0189 M 0.015- 0.010- 0.005- 50 100 150 200 250 300 seconds O created Is NH, b...
A: A question based on introduction to chemistry that is to be accomplished.
Q: A tea bag containing 15 grams of tea leaves with 0.7% of caffeine was used in solid-liquid extractio...
A:
Q: 20. Which of the following pressures is equal to 0.80 atm? a. 9.5 x 10 torr b. 1.3 bar c. 24 in. Hg ...
A: Given : We have to calculate the which pressure is equal to 0.80 atm
Q: propose seme pessble struetures that fit the date 2a. C. H, O containing compound with MW 100 A ligu...
A: IR spectrum is used for the identification of the functional group present in the molecule. The func...
Q: HONE FUR OReviews Additional Problems / 53 94. To measure the density of a small statue, you determi...
A:
Q: Which is NOT an appropriate detector for a spectrophotometer? photodiode array photomultiplier tube ...
A:
Q: Give the product of the following reaction MEOH/Me*-OH (cat.) но OH HO OMe OH Meo C Meo Meo D
A:
Q: The rigid rotor model is often used to study the rotation of diatomic molecules. In this case, there...
A:
Q: Et dl LIOH H2 NO H Et 401
A: We have been asked to predict the mechanism for the given reaction. We have been given hydroxylamine...
Q: What is the IUPAC name for the molecule shown below?
A: Rule of IUPAC- 1) Choose the longest chain as parent chain including triple bond. 2) Numbering star...
Q: solution Conductivity – high, Explanation low or zero? 0.1 mol/L ethanoic acid 0.1 mol/L ammonia A m...
A: 0.1 mol/ L ethanoic acid Since ethanoic acid (Acetic acid) is weak, its dissociation is very low....
Q: The heat of formation at 25oC of liquid acetone, CH3C(O)CH3(l) is -247.5 kJ/mol. Which of the follow...
A: Here we are required to find the equation which would represent the heat of formation of acetone
Q: Draw the structure of the following compounds. Use line-angle structural formula. 5-cyclobutyl-2-cy...
A: Draw the structure of the following compounds. Use line-angle structural formula--
Q: Name the given compounds. For uniformity's sake, name all the branched substituent as if naming an a...
A:
Q: Question 16 Spectrophotometers employ various sources of light. Which of the following is NOT true f...
A: * Dueterium arc lamp discharge tube can not emits visible radiation but emits uv radiation. * Tungst...
Q: To purify a certain protein, you were required to prepare a 0.10 M glycine buffer at pH 9.4. Unfortu...
A: The one at pH 9.0 has a concentration of 10^-9 of H+, and the one at pH 10.0 has a concentration of ...
Q: What is the linearity (r2) value of the following concentration and absorbance values SAMPLE CONCENT...
A: Given
Q: Some measurements of the initial rate of a certain reaction are given in the table below. N2||H2|ini...
A: We have to predict the rate law and rate constant.
Q: The standard addition method is used to analyze a sample of a river water for mercury. Solution A is...
A: Given, Percent transmittance of solution A = 56 % Percent transmittance of solution B = 33 % Percent...
Trending now
This is a popular solution!
Step by step
Solved in 3 steps with 3 images
- 2. A 1500ml of water was added to 300ml of 0.50M NaOH solution. a. What is the new volume of the solution? b. What is the new concentration of the solution in M and N? MW Na:23, 0:16, H:13. Vida and Min dissolved 0.0521 g of C6H8O6 in a 100 mL volumetric flask with deionized water. A 10.0 mL aliquot of this standard CHO solution required 23.7 mL of DCIP to reach the end point. A 5.00 mL aliquot of orange juice required 14.4 mL of the same DCIP solution to reach the end point. a. What is the molarity of the standard ascorbic acid solution? b. What is the molarity of the DCIP solution? c. How many mg of C6H8O6 are present in the juice sample? d. How many mL of orange juice are needed to satisfy the adult DRI requirement for Vitamin C?Bay Water Titration The concentration of Cl- in ocean water is about 500-600 mM. The baywater is diluted by a factor of 12.5 using a 20.00 mL volumetric pipet and a 250 mL volumetric flask. Using a 15.00 mL volumetric pipet, 15.00 mL is transferred into three clean Erlenmeyer flasks. 10 mL of 1% dextrin solution, 20 mL of de-ionized water, and 3-4 drops of indicator are added and titrated each with the AgNO3 solution. From the procedure, find: Dilution factor Volume of diluted bay water Then calculate: The [Cl-] of diluted bay water The [Cl-] of bay water Consider this information: [AgNO3] = 0.04043177 trial # Veq 1 13.91 2 13.73 3 13.9 4 13.86 5 13.87 6 13.84 average 13.85167 [Cl-]Bay = ([AgNO3](Veq(ave))/Vdil bay water pipeted) (Vflask/Vbay water)
- Exactly 1.00 grams of granular table salt was dissolved in deionized water up to 500 mL. An aliquot of 20 mL was titrated with AgNO3 (T = 8244 mg/mL) and consumed 46.60 mL to reach end point. Calculate the percent purity of the NaCl. Ans in 2 sig figures.A mixture containing only KCl and NaBr is analyzed by the Mohr method. A 0.2125- g sample is dissolved in 25 mL of water and titrated to the Ag2CrO4 end point, requiring 25.63 mL of 0.1110 M AgNO3. A blank titration requires 1.15 mL of titrant to reach the same end point. Report the %w/w KCl and NaBr in the sample.KCl = 74.551 NaBr = 102.89A mixture containing only KCl and NaBr is analyzed by the Mohr method. A 0.2125-g sample is dissolved in 25 mL of water and titrated to the Ag2CrO4 endpoint, requiring 25.63 mL of 0.1110 M AgNO3. A blank titration requires 1.15 mL of titrant to reach the same end point. Report the %w/w KCl and NaBr in the sample. KCl = 74.551 NaBr = 102.89
- An sample of eggshell that weighs 1.0014g and is 51μm thick is titrated with disodium EDTA. A solution of the 1.0014g sample and 30 mL of HCl is vacuum filtered after being mixed. The product of the filtration is added to a 250mL volumetric flask and is diluted by being filled to the 250 mL mark with deionized water. 10 mL of this diluted mixture is mixed with EBT indicator and titrated with 0.05 M disodium EDTA. It takes 12.3 mL of disodium EDTA to notice a change in color. What percent mass of calcium is in the eggshell?A 0.8250 g of soda ash sample was dissolved in distilled H₂O and diluted to 250-mL using a volumetric flask. This solution was labeled as dilute soda ash solution (DSAS). a. A 50.00 mL aliquot portion of the dilute soda ash solution needed 5.20 mL of 0.1200 M HCI to reach the phenolphthalein end point. About 2-3 drops of methyl orange to the same mixture and it needed 10.00 mL of 0.1200 M HCI to reach the methyl orange end point. 1. Calculate the number of millimoles of HCI needed to reach the phenolphthalein end point. 2. Calculate the number of millimoles of HCI needed to reach the methyl orange end point. 3. What is the %Na₂CO, and %NaHCO, present in the soda ash sample? b. From the dilute soda ash solution (DSAS) two 50-mL portions were obtained. The first portion needed 5.20 mL of 0.1200 M HCI to reach the phenolphthalein end point. The second 50-ml portion needed 15.20 mL to reach the methyl orange end point. 4. Calculate the number of millimoles of HCI needed to reach the…ution by avestigate 2003-2023 International Academy of Science. All Rights Reserved. MA What volume of a 1.25 M potassium fluoride (KF) solution would be needed to make 455 mL of a 0.838 M solution by dilution? [?] mL of 1.25 M KF 5 Q Search F5 F6 6 & F7 7 Volume (mL) . 7 * F8 8 DELL F9 9. prtsc F10 Enter home F11 Q a end F12 Insert •11 del A Back
- The Kjeldahl method was used to determine the nitrogen content of a protein. A 275 µL aliquot of a 47.0 mg/mL protein solution was digested in boiling sulfuric acid. The solution was made basic and the liberated NH, was collected in 5.00 mL of 0.0512 M HCl. A volume of 7.00 mL of 0.0174 M NaOH was required to react with the excess HCl. Calculate the weight percent of nitrogen in the protein. weight percent: wt% NAn unknown sample of Cu2+gave an absorbance of 0.262. Then 1.00 mL of solution containing 100 ppm (ug/mL)Cu2+was mixed with 95.0 mL of the unknown and the mixture was diluted to 100 mL in a volumetric flask with deionized water. The absorbanceof the new solution was 0.500. a.Denoting the initial unknown concentrationas [Cu2+]i,write an expression for the final concentrationafter dilution [Cu2+] b.Find [Cu2+]in the unknown.A. The weight of 25 tablets of morphine sulfate (150 mg) is 3.075 g. If 0.3075 g was used in the assay and it required 10.3 ml of 0.023N NaOH to back titrate 25 ml of 0.021N H2SO4. Calculate the percent labeled amount of morphine sulfate. Each ml of 1N H2SO4 is equivalent to 758.83 mg of morphine sulfate.