Standardization of 1N Potassium Hydroxide Accurately weigh about 5 g of potassium biphthalate, previously crushed lightly and dried at 120° for 2 hours, and dissolve in 75 mL of carbon dioxide-free water. Add 2 drops of phenolphthalein TS, and titrate with the sodium hydroxide solution to the production of a permanent pink color. Titration Data Weight of potassium biphthalate used in the titration: 5.1037 g Volume of potassium hydroxide solution used in the titration: 31.20 mL What is the true concentration, in normality, of the potassium hydroxide solution?
Q: 5. Using a flow chart like that on page (6-2), outline a procedure to isolate each of the chemicals…
A: We have to draw a flow chart of procedures to separate the given compounds from a mixture .
Q: A 350 mg sample containing KClO3 was carefully reduced and treated with excess AgNO3. The resulting…
A: First write down reaction for conversion of KClO3 to AgCl and then find out percentage of KClO3 in…
Q: H3C H + CH3OH (+ excess CH3OH, H+) →
A:
Q: Determine the first step of this mechanism.
A:
Q: Suppose the decomposition of nitrogen dioxide proceeds by the following mechanism: step elementary…
A:
Q: I. Write the condensed structures corresponding to the following names: 1.…
A: See below
Q: Show how you would use the amidomalonate synthesis to prepare a racemic mixture of Tryptophan .
A: Amino (NH2) and acid (COOH) group having compund are called amino acid.
Q: O OH O C-OH 0 С-ОН Br NO₂ H2C-CH3 ОН I 11 III IV V Rank the following acids by acid strength, from…
A:
Q: ОН О-С-ОН O=C-C 0=C-0 ОН Br NO₂ H2C-CH3 ОН IV V Ш I 11 . Rank the following acids by acid strength,…
A: Given-> Strength of acid can be determined by stability of conjugate base if conjugate base is…
Q: What is the oxidation number of Na in Na2SO4 What is the oxidation number of H in CaH2 What is the…
A: Here we are required to find the oxidation number of each species
Q: Which among the following nickel complexes is the most thermodynamically stable? O [Ni(en)]2+ K₁ =…
A: we need to select the most thermodynamically stable nickel complex
Q: C. Draw the skeletal structure and give the IUPAC name for each compound. Condensed Structure…
A:
Q: What is the difference between computational calculations based on Molecular Mechanics and…
A: Computational chemistry is a branch of chemistry that uses computers to assist in solving chemical…
Q: The Ka of a monoprotic weak acid is 0.00493.What is the percent ionization of a 0.103 M solution of…
A:
Q: A. Starting from 1-butanol, synthesize the major compounds formed assigned from letters A to L.…
A: #A and B: NaH being a strong base, deprotonates ROH to form RONa. Then RONa reacts with R'-Br to…
Q: provide mechanism with stepwise curved for this reaction Reaction of the Grignard reagent with the…
A: Reaction of alkylmagnesium halides with carbonyl compounds (aldehydes and ketones) is an example of…
Q: The table shows how K changes with T in the Born-Haber process. Calculate the enthalpy change of the…
A: Equilibrium constant(K), standard enthalpy of reaction, ∆Ho, standard entropy of reaction, ∆So and…
Q: 1. Most margarines have been hydrogenated to maintain a soft, homogeneous mixture. While the product…
A:
Q: 1. A student carried out an experiment using an egg shell that contains Calcium Carbonate. A 0.500…
A: Answer: In this question two types of titrations are taking place, one titration is between weak…
Q: According to the Newman Projection provided below, the correct dihedral angle is: R₁ H Ca O₁ C C phi…
A:
Q: ОН O C-OH 0=C-OH O=C-ОН Br NO₂ H2C-CH3 ОН I 11 ||| IV V Rank the following acids by acid strength,…
A: In this question, we will arranged all acidic compounds from least acidic to most acidic. You can…
Q: O OH O C-OH 0 С-ОН Br NO₂ H2C-CH3 ОН I 11 III IV V Rank the following acids by acid strength, from…
A: Acidic strength is directly proportional to -I effects.
Q: a. What is the cell notation of the set-up? b. What is the standard cell potential?
A: Here we have to write the cell notation and to calculate standard cell potential of the following…
Q: How much UF6 can be produced from 740.5 g of UO2? * 104.1 g UF6
A:
Q: Calculate the mass of sodium-24 that will remain in a 20.0 g sample after 75 hours. Sodium has a…
A: Chemical kinetics is branch of chemistry in which we deal with the speed at which rate of reaction…
Q: To what structural effect would you attribute the preference of methyl bromide over t-bromyl bromide…
A: To what structural effect would you attribute the preference of methyl bromide over t-bromyl bromide…
Q: 2. Complete the balanced equation for the following reaction. Write the total ionic and net-ionic…
A: In this question, first we need to balanced and complete the chemical reaction equation then we will…
Q: A sample of gas is at 45.0 °C. At what temperature would the volume of this gas be the double of the…
A: Dear student , since you have posted multiple questions we will allow to solve only first question…
Q: Provide the major monobrominated product of the reactions below Br₂, hv i) Br₂, hv ii) In the…
A:
Q: If the Standard Potential cell for the following AgI/Ag and I/I Was -0.152vand o, suv respectillery.…
A:
Q: Identify the conjugation acid- base pairs in the following reaction HCO3- + NH3 => CO3-2 + NH4+ O…
A:
Q: Pretend you are a teacher or tutor helping a group of students understand molecular structure. They…
A:
Q: Determine the iupac name and the draw the structure of the main product formed.
A: We have to do the following reaction and have to find the IUPAC name.
Q: Match the compound below with its corresponding geometric isomerism identifier
A:
Q: Chemistry A 25g sample of Strontium Acetate reacts wuth Sodium Chloride in a double replacement…
A: In the balanced chemical equation, the no of each atom should be equal on both the side of the…
Q: s). Te supematant quid was iated with Calculate otal hardness (this includes the Mg2+) of the water…
A: Here we have to determine hardness of water.
Q: JJ is making miso soup. 1 bowl of soup has a volume of 375 mL. The soup has 1.00 g of table salt in…
A:
Q: 3. A solution is prepared by dissolving 150 ml of isopropyl alcohol in enough water f produce 1.5 L…
A:
Q: Predict the sign of the entropy change of the system for each of the following reactions.
A:
Q: 2. Question : Arrange the following compounds in increasing order of their reactivity in…
A: Given statement is : Arrange the following compounds in increasing order of their reactivity in…
Q: A H₂C B CH3 10+ 0² -NH, HỌC. AC-NH -CH₂ NH₂ с
A: ->we can see Basicity of amine on the basis of loan pair availability .If loan pair easily…
Q: 2. 3. H3C H + CH3OH (+ excess CH3OH, H+) → (h) CH3CH₂OH + PCC → (i) Br (i) + Mg (j)
A: In this question, we will draw the structure of the products (h), (I) and (j) You can see the…
Q: there is an enzyme is catalyzed reaction that is at equilibrium and it produces 0.1 M of substrate…
A:
Q: 12. [Refer to figure 2] Which structural formula shows the ester that has an odor like pineapple?…
A:
Q: 8 Below is the H-NMR of a reaction product of aniline. Provide the structure of the product and the…
A:
Q: Zn(CN)2 Ksp (30°C) = 7.30 x 10-12 AgSCN Ksp (30°C) = 5.90 x 10-11 CL chose to investigate the…
A: We have two different salts, Zn(CN)2(s) and AgSCN(s) to compare and find the unknown salt out of…
Q: CS Scanned with CamScanner CH₂ + Br₂ → (
A:
Q: mal expansion of an ideal gas against zero pressure, w = 0, A n of the complex [Co(en)3]³+ at 25 °C…
A: As we know,in isothermal process, Temperature remains constant. And for Spontaneous process, □G is…
Q: Consider the electrolysis of an aqueous solution which is 1.0 M NaCl and 1.0 M NiCl₂. Predict the…
A:
Q: What is the only way to reduce random error in measurements?
A: A question based on tools in analytical chemistry that is to be accomplished.
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- Rinse and fill the buret with 0.100 M HCl solution. Transfer accurately 25.0 mL of saturated calcium hydroxide solution (2g of calcium hydroxide per 100 ml of water) into two separate E-flasks. Add 2 drops of phenolphthalein to each flask and titrate each solution until the pink color disappears. Voume of HCl used: Trial 1= 6.80ml; Trial 2 = 6.30mL Determination of solubility and Ksp of calcium hydroxide 2. Compute for the moles of H+ used and the moles of OH- present. moles of H+ used = (concentration of HCl) × (volume of HCl used)moles of OH- = moles of H+ used 3. Construct an ICE table for the reaction.4. Calculate the molar solubility (in mol/L) of OH- and Ca2+.5. Determine the solubility of Ca(OH)2 in g/L. (MM of Ca(OH)2 = 74.096 g/mol)6. Calculate the Ksp of Ca(OH)2.7. Compute for the percent error of the experimental value for Ksp of Ca(OH)2 with the literature value.(Ksp of Ca(OH)2 = 8.0 × 10-6 at 25°C)Tim is interested in analyzing for Pyraclostrobin (pesticide) in strawberries using QuECHers method for extraction and clean up before analysis with HPLC-uv. The concentration of the Pyraclostrobin in the fruits that he sampled is thought to be between 1-10 ng pesticide per g fruit fresh weight. The HPLC-uv instrument he is using has a LoQ of 5 ppb for Pyraclostrobin. Tim is starting out with 500 mg of the sliced fruitThe buret was filled with 0.100 M HCl solution. Then was transferred in a 25.0 mL of saturated calcium hydroxide solution (2g of calcium hydroxide per 100 ml of water) in two separate E-flasks. Then 2 drops of phenolphthalein was added to each flask Titration data for the determination of solubility and Ksp of calcium hydroxide: Trial 2: Final Buret reading (ml)-26.10; Initial Buret reading (ml)- 19.80; Temperature (Celcius)- 25 Voume of HCl used: Trial 2- 6.30mL 1. Compute for the moles of H+ used and the moles of OH- present. moles of H+ used = (concentration of HCl) × (volume of HCl used)moles of OH- = moles of H+ used 2. Construct an ICE table for the reaction.3. Calculate the molar solubility (in mol/L) of OH- and Ca2+.4. Determine the solubility of Ca(OH)2 in g/L. (MM of Ca(OH)2 = 74.096 g/mol). 5. Calculate the Ksp of Ca(OH)26. Compute for the percent error of the experimental value for Ksp of Ca(OH)2 with the literature…
- Lead nitrate Stock Solution— Dissolve 159.8 mg of lead nitrate in 100 mL of water to which has been added 1 mL of nitric acid, then dilute with water to 1000 mL. Standard Lead Solution— On the day of use, dilute 10.0 mL of Lead Nitrate Stock Solution with water to 100.0 mL. Each mL of Standard Lead Solution contains how many µg of lead? Standard Preparation— Into a 50-mL color-comparison tube pipet 2 mL of Standard Lead Solution, and dilute with water to 40 mL, and mix. Test Preparation— Into a 50-mL color-comparison tube dissolve 1.0g ascorbic acid (mol wt 176.12) in 25 mL of water, dilute with water to 40 mL, and mix. Procedure— To each of the two tubes containing the Standard Preparation, the Test Preparation, add 2 mL of pH 3.5 Acetate Buffer, then add 1.2 mL of thioacetamide–glycerin base TS, dilute with water to 50 mL. Mix, allow to stand for 2 minutes, and view downward over a white surface. The color of the solution from the Test Preparation is not darker than that of the…Make a schematic diagram for the procedure below: B. % SO3 determination Dry the soluble sulfate sample at 100° C for 1-2 hours, and cool in desiccator. Weigh out 0.5 – 0.7 g (± 0.3 mg) duplicates sample. Transfer to 400-mL beakers. Dissolve each in 200 mL of dist. H2O + 4 mL of 6 m HCl. Precipitant is prepared by dissolving 1.3 g BaCl2 ∙ H2O in 100 mL water. Filter if solution is not perfectly clear. Heat the BaCl2 solution and sulfate sample solution nearly to boiling, and then add the entire amount to the HOT sulfate sample solution while stirring vigorously. Wash stirring rod with distilled water and include washings in your final mixture. Digest by letting stand 1-2 hours. Overnight standing is acceptable. Filter through an ash less filter paper of fine porosity (Whatman no. 42). Slowly pour the supernatant liquid through the filter paper.Methodology: Make schematic diagram for the procedure below B. % SO3 determination Dry the soluble sulfate sample at 100° C for 1-2 hours, and cool in desiccator. Weigh out 0.5 – 0.7 g (± 0.3 mg) duplicates sample. Transfer to 400-mL beakers. Dissolve each in 200 mL of dist. H2O + 4 mL of 6 m HCl. Precipitant is prepared by dissolving 1.3 g BaCl2 ∙ H2O in 100 mL water. Filter if solution is not perfectly clear. Heat the BaCl2 solution and sulfate sample solution nearly to boiling, and then add the entire amount to the HOT sulfate sample solution while stirring vigorously. Wash stirring rod with distilled water and include washings in your final mixture. Digest by letting stand 1-2 hours. Overnight standing is acceptable. Filter through an ash less filter paper of fine porosity (Whatman no. 42). Slowly pour the supernatant liquid through the filter paper.
- 1. These are balances that have a maximum loading of 10 to 30 g with a precision of 60.01 mgA. semi-microanalyticalB. MicroanalyticalC. MacrobalancesD. Triple Beam Balance2. Which type of curve is normally produced when plotting the change in the concentration of a specie of some function and the amount of reagent added?A. Titration curveB. Sigmoidal CurveC. Phase Transition curveD. Calibration curve3. In the dead dear case study, silver diethyldithiocarbamateforms a colored solution when it binds with arsenic, what do we call substance like silver diethyldithiocarbamate?A. Secondary standard reagentB. Precipitating agentC. Chelating agentD. Primary standard reagentThe thiourea in a 1.455 g sample of organic material was extracted into a dilute sulfuric acid solution and titrated with 37.31 mL of 0.009372 M Hg2+ via reaction: 4(NH2)2CS + Hg2+ →[(NH2)2CS]4 Hg2+ P.S. Answer only the last two letters of the following questions. (Only C and D) a. Is this an example of total analysis technique or concentration technique? Explain. b. Calculate the percent (NH2)2CS ( 76.12 g/mol) in the sample. c. What is classification of the analysis based on the amount of sample and amount of analytes present? Explain. d. If the true value is 10.00%, calculate the absolute and relative error.25 ml of pickled brine was taken from an apple pickled with vinegar and diluted to 500 ml, 25 ml of this was taken and acidity was determined with 0.2 N (Factor: 1.05) NaOH. In the main trials, 6.3 ml - 6.5 ml - 6.9 ml, respectively, 0.1 ml base was used in the analysis without using the sample.For example, how many ppm is its acidity?
- The buret was filled with 0.100 M HCl solution. Then was transferred in a 25.0 mL of saturated calcium hydroxide solution (2g of calcium hydroxide per 100 ml of water) in two separate E-flasks. Then 2 drops of phenolphthalein was added to each flask Titration data for the determination of solubility and Ksp of calcium hydroxide: Trial 1: Final Buret reading (ml)-19.80; Initial Buret reading (ml)- 13.00; Temperature (Celcius)- 25 Trial 2: Final Buret reading (ml)-26.10; Initial Buret reading (ml)- 19.80; Temperature (Celcius)- 25 Voume of HCl used: Trial 1- 6.80ml; Trial 2- 6.30mL 1. Compute for the moles of H+ used and the moles of OH- present. moles of H+ used = (concentration of HCl) × (volume of HCl used)moles of OH- = moles of H+ used 2. Construct an ICE table for the reaction.3. Calculate the molar solubility (in mol/L) of OH- and Ca2+.4. Determine the solubility of Ca(OH)2 in g/L. (MM of Ca(OH)2 = 74.096 g/mol). 5.…You are given a container with Na3PO3 that is reportedly contaminated. You are asked by your supervisor to determine the percent purity of that sample in order to know the next measures to be taken by the plant. The following are the procedures that you need to do: a. Dissolve sample weighing 1 g in 35 mL water. b. Prepare solution with 45 mL 3% w/v HgCl2, 30 mL 10% w/v C2H3NaO2 and 10 mL CH3COOH. c. Digest sample then filter then rinse the precipitate that weighs 0.2857 g. d. Compute for the % purity.20 aspirin tablets labeled 80mg were dissolved in 100mL of 90% ethanol. A 10mL aliquot was taken and was used for assay. The analyte followed usual process and was treated with 50mL of 0.1000N NaH and was titrated with 35mL 0.1050N H2O4 until the solution achieved completion. Calculate the % content of the total aspirin capsules and the actual label claim