TOPIC: Stoichiometric Calculations 1.) How do you prepare 75mL of 25% (w/v) sodium chloride? 2.) How do you prepare 25mL of 0.4% (w/v) cesium chloride? 3.) How do you prepare 150mL of 25% (v/v) glycerol?
Q: q Complete the table below for calculating the molecular weight of the compound…
A:
Q: Part E-4 Observation: aluminum nitrate + sodium phosphate evidence of reaction: Part F…
A: Answer: In the given questions we have to identify the chemical reaction taking place for the given…
Q: Draw and upload as an attachment the Lewis structure for nitric acid (HNO3). (Remember no heic…
A: The molecule given is nitric acid, a polar molecule.
Q: In early 1960s, the National Cancer Institute was able to isolate a complex organic compound from…
A: Any carbon that has four different groups or atoms bonded to it is called a chiral carbon or…
Q: Draw all of the steps of the mechanism for this reaction. You do not need to show curved arrows for…
A: When 1 equivalent grignard reagent reacts with ester it gives ketone as a product
Q: MgBr 1) BH3 THE 2) H₂O₂, NaOH OH OH 1) 2) H₂O excess Na₂Cr₂O7 H₂SO4 H₂O SOCI₂ LU
A: The question is based on the concept of organic reactions. we convert the reactant into product…
Q: At a certain temperature this reaction follows second-order kinetics with a rate constant of 1.7M:…
A:
Q: P ed Lewis structure Cl =0. :0 :Z: C=N :C=0: Is the proposed Lewis structure reasonable? Yes. No, it…
A:
Q: How many moles of sodium sulfite are contained in 485 g sodium sulfite
A:
Q: For the gas phase reaction: NO₂(g) O No change In what direction will the reaction shift to…
A: Given gas phase reaction: N2(g) + 2O2(g) <=> 2NO2(g)
Q: Answer the questions in the table below about the shape of the bromodifluoride (BrF₂) anion. What…
A:
Q: 3.3 8 Give the reaction mechanism and name the products for the reaction of 2-bromobutane with a hot…
A: Given that, 2-bromobutane is reacted with the hot ethanolic solution of KOH. We have to give the…
Q: of Which of the following compounds has the most stable enol tautomer? a. O b. O d. ii OH
A:
Q: Calculate the number of boron atoms in a 50.0 g sample of tetraborane (B4H₁0). Be sure your answer…
A: Given, mass of sample of tetraborane (B4H10) = 50.0 g Number of atoms of boron (B) = ? Note: molar…
Q: 1. Acetic acid (CH3COOH - though this structural formula does not really show the true connectivity…
A: This question belongs to the basic introduction to organic chemistry .I will explain further on this…
Q: For each of the following compounds, decide whether the compound's solubility in aqueous solution…
A: The given ionic compounds are KCl, Ca(OH)2, and CaCl2 The solubility of an ionic compound changes…
Q: What is the internatio IUPAC name for the major products of the retret bemidda radice I bromivation…
A: During the radical bromination of cyclihexane. First Br2 dissociates homolytically to form Br•…
Q: A reaction has the following rate law: Rate= K[A][B]. If the concentration of A is increased by a…
A: From rate law it's clear order with respect to A is two and order with respect to B is one
Q: s [Ni(NH,), Suppose equal volumes of 0.0030 M Ni(NO,), solution and 0.46M NH, solution are mixed.…
A: We have to calculate the molarity of Ni2+ ion
Q: Consider the following system at equilibrium where AH° = 198 kJ, and Kc = 0.0290, at 1150 K:…
A: This problem is based on Le Chatelier's principle and by using this we shall solve the problem. The…
Q: NH₂ CH3CHO
A:
Q: [Review Topics] [References] Use the References to access important values if needed for this…
A: The question is based on the concept of Le-chatlier principle. It States that when a system at…
Q: Write the acidic ionization equation for HCI. Be sure to include the proper phases for all species…
A:
Q: Calculate the molar concentration of a blood sugar level of 100 mg /dl where MW glucose = 180
A:
Q: Part B How much Na SO, solution must be added to initiate the precipitation? Express your answer in…
A: 1.0 M Na2SO4 solution is added slowly to 40 mL of a solution that is 0.20 M in Ca2+ and 0.30 M in…
Q: he solvation of calcium carbonate in water is shown. CaCO, (s) + H₂O¹(aq) Ca² (aq) + HCO; (aq) +…
A: Solubility of CaCO3 in water is, ,CaCO3s↔Ca2+aq +…
Q: A 0.066 mol sample of formaldehyde vapor, CH₂O, was placed in a heated 500 mL vessel and some of it…
A: Equilibrium constant is defined as ratio of products concentrations to reactant concentrations in to…
Q: PRE-LAB QUESTIONS 1. Why do we set the spectrophotometer or colorimeter to a wavelength of 565 nm or…
A: An analytical tool called a spectrophotometer is used to determine the emission or reflection of…
Q: What word or two-word phrase best describes the shape of the PCl, molecule? What is the angle…
A: Hybridisation is phenomenon of combining two atomic orbitals to give a new degenerate hybrid…
Q: Draw the Lewis structure for the xenon tetrafluoride (XeF4) molecule.
A: Answer :
Q: For the aqueous [Cu(NH₂)]* complex K, -2.09 x 10¹ at 25 °C. Suppose equal volumes of 0.0060 M…
A: We have to calculate the molarity of Cu2+ ion
Q: + CO₂Me CO₂Me CO₂Me CO₂Me CO₂Me CO₂Me CO₂Me CO₂Me CO₂Me CO₂Me heat ?
A: The Diels-Alder reaction is the reaction between a conjugated diene and an alkene (dienophile) to…
Q: Consider the following chemical equilibrium: 4 NH, (g)+30₂)2N₂(g) + 6H₂O(g) Now write an equation…
A: Expression of Kc includes the concentration terms while expression of Kp includes the partial…
Q: name hypochlorous acid acetic acid 0.1 M KCIO acid solution 0.1 M HONH3Br 0.1 M NaCH3CO₂ 0.1 M KBr…
A: As we know, salt of strong acid and strong base are neutral in nature . salt of weak acid and…
Q: Calculate the solubility at 25 °C of CuBr in pure water and in 0.27 M NaCN. You'll probably find…
A:
Q: What is the pH of a solution containing 0.761 mol L-1 of a weak acid with pKA = 3.89 and 0.811 mol…
A: We will first calculate the Ka value from pKa value. and we will use the formula-
Q: At 400 K, N₂O4 decomposes into NO2 in the gas phase: N₂O4(g) 2NO₂(g) In an experiment, 0.328 g of of…
A:
Q: Consider the four substituents below. Order them in decreasing priority according to the…
A:
Q: Question: Consider a sample of gas that contains 400 moles of smokestack gas. How many molecules are…
A: Mole is the SI unit of amount of substance and 1 mole is defined as the the group of 6.022 x 1023…
Q: Of the following, which are amphiprotic? (select all that apply) Select all that apply: H₂PO4 OHS ☐…
A: Answer: Species those can accept the proton as well as donate it are called as amphiprotic species.…
Q: Draw 4 isomers of C₆H₁₂ that have the (E)-configuration.
A: When the higher priority groups are on the same side of the double bond then the configuration is…
Q: The half-lives of different radioisotopes are given in the table. Radioisotope Half-life (min)…
A:
Q: In the lab, you are given 3-nitroacetophenone. If you reduce this with NaBH4, you will receive…
A: Infrared spectroscopy (IR) is a technique used to identify and study the vibrations of molecules. It…
Q: A small K (K << 1) would generally indicate: a fast reaction a slow reaction at equilibrium, it is a…
A: Low value of K(<< 1) shows that backward reaction is favoured, i.e. at equilibrium ,…
Q: 4000 100 80 IR Spectrum (liquid film) 20 % of base peak 40 10 3.0 3000 13C NMR Spectrum (125.0 MHZ,…
A: We can find the main functional group from IR spectrum, molecular mass of the unknown molecule from…
Q: 3. Synthesis Design a synthetic route to perform the transformations shown below. You may use any…
A: Gilman reagent undergoes 1,4-addition to the α,β-unsaturated carbonyl compounds. Gilman reagent is…
Q: What is the angle between the carbon-oxygen bond and one of the carbon-hydrogen bonds in the…
A:
Q: What volume of solution would be needed to deliver 2.0 g of a drug if the concentration of the drug…
A: given , mass of drug = 2.0 g Concentration of drug in solution = 10.0 %
Q: Н I-Z S ОН
A: Amide functional group: Primary: R-CONH2 Secondary : R-CONH-R Tertiary : R-CONR2
Q: 4. Provide names (systematic or common) for the following compounds Br. мон бе де H
A:
TOPIC: Stoichiometric Calculations
1.) How do you prepare 75mL of 25% (w/v) sodium chloride?
2.) How do you prepare 25mL of 0.4% (w/v) cesium chloride?
3.) How do you prepare 150mL of 25% (v/v) glycerol?
Trending now
This is a popular solution!
Step by step
Solved in 8 steps with 3 images
- Question 4Using the information below, calculate the percentage w/v of lidocaine (MM (234.34 g/mol)in Lignocaine Oral Topical Solution. Show your reasoning clearly and record your finalanswer to three significant figures. "Transfer an accurately measured volume of Oral Topical Solution,equivalent to about 150 mg of lidocaine, to a 125 mL conical flask,and protect from atmospheric moisture with a stopper fitted with atube containing silica gel. Add 20 mL of glacial acetic acid and 2 drops ofcrystal violet TS. Titrate immediately with 0.1 M perchloric acid VS to a blue endpoint.Perform a blank titration, and make the necessary correction."Results:.Amount of topical solution measured = 7.5 mL.Concentration HCIO4 0.09898 MVolume titrated 7.05 mL. Volume blank titration 0.65 mL.1) How many milliliters of 70% ethanol and 20% ethanol must be mixed to prepare 500ml of 30% ethanol? 2) A gaseous blend of nitric oxide and nitrogen (NOmax) contains 0.09% v/v nitric oxide (NO) and 99.92% v/v nitrogen. Express the strength of nitric oxide in PPM (round to whole number) 3) The ratio strength of a 10mL vial of neostigmine methylsulfate injection USP is 1:1500.Calculate the amount of neostigmine methylsulfate in milligrams contained in the 10mL vial. (Round to the whole number).If you have 6.61 g of caffeine dissolved in 72.3 mL of water and the extraction coefficient between H2O and CH2Cl2 is 21.51. How many grams of caffeine will extract into the CH2Cl2 layer if you add 87.6 mL?
- The first goal is to make the oxalic acid standard solution. You measure 1.5232 g of oxalic acid on an analytical balance, add it to a 250-mL volumetric flask and add deionized H2O to a final volume of 250.0 mL. Molar mass of H2C2O4•2H2O = 126.07 g/mol Mass of H2C2O4•2H2O = 1.5232g Volume of H2C2O4•2H2O solution = 250.0mL What is the Molarity H2C2O4 standard solution ?If you have 6.76 g of caffeine dissolved in 57.2 mL of water and the extraction coefficient between H2O and CH2Cl2 is 21.51. How many grams of caffeine will extract into the CH2Cl2 layer if you use 89.9 mL?In a solution containing 25ml (NH4)2S2O8 with a total volume = 100 ml =0.1 liters , the solution composition are shown below.Note; the solution require 25ml of 0.2M S2O8^-2.SOLUTION Kl KNO3 EDTA Na2S2O3 STARCH50ml 23ml 1 drop 1 ml 10 dropsExperiment; initial (S2O8-2) =0.05M ; INITIAL (l-)=0.10 Mml of S2O3^-2 added Time in minutes and seconds for color change Cumulative time in seconds Total moles of S2O8^-2 consumed1 1:43 2.0 x 10^-42 1:20 4.0 x 10^-43 1:13 6.0 x 10 ^-44 1.17 8.0 x 10 ^-45 1.24 10 x 10 ^-41a) Find the cumulative time in secondsb) for the runs ,plot mole of S2O8^2- REACTION vs. time in seconds2) Draw a straight line through ( origin ) the points and calculate the slope3) divide the value of the slope by the total volume of ( 0.1 L) to get the rate in units of M/s4) find the rate5 )calculate x and y and k
- How would you prepare 75 mL of an H2SO4 solution at 20% in weight (density=1.1394 g/mL, richness=227.9 g/L) starting from the commercial H2SO4 solution (98%, density=1.8361 g/mL, richness=1799 g/L)? Please choose among the most appropriate procedure which better describes the preparation of the previous diluted H2SO4 solution: Select one or more: a. Take the required volume of commercial H2SO4 solution with an adequate pipette, pour it into a graduated flask and add water up to the final volume (75 mL in this case). Homogenize the flask by stirring it gently. b. Take a beaker and put about 40 mL of distilled water. Then take the required volume of commercial H2SO4 solution with an adequate pipette and pour them over the beaker. Let the solution be warm and pour the mixture into a graduated flask and add water up to the final volume (75 mL in this case). Homogenize the flask by stirring it gently. c. Take a beaker and put about 40 mL of distilled water. Then take the required volume…The first goal is to make the oxalic acid standard solution. You measure 1.5232 g of oxalic acid on an analytical balance, add it to a 250-mL volumetric flask and add deionized H2O to a final volume of 250.0 mL. Molar mass of H2C2O4•2H2O = 126.07 g/mol Mass of H2C2O4•2H2O = 1.5232g what is the Number of moles of H2C2O4•2H2O?An iron ore has a 55% Fe2O3 with 5% moisture content. What is the Percentage of Fe2O3 in a dry basis?
- The chemical method of analysis in determination of the blood alcohol content (%BAC) is: K2Cr2O7 + H2SO4 + C2H5OH → Cr2(SO4)3 + K2SO4 + CH3COOH + H2O What are the stoichiometric coefficients for the reaction above? (please enter the coefficients without spaces and with a coma between the numbers, e.g. 1,2,3,4) During a Breathalyzer Test it was determined that 2.00mg of K2Cr2O7 was consumed by the above reaction. Calculate the number of milligrams of ethanol in the test sample. Calculate the Blood Alcohol Content in this sample (%BAC).The stock erythrosine B solution is 8.5 × 10-5 M. Calculate the volume of this solution that you must pipet into a 50-mL volumetric flask, which, when diluted to mark with deionized water, will give a final concentration of 1.7 × 10-5 M. Show your calculation setup.How would you prepare 1ml of a 0.5wt% alginate hydrogel with 30mg/ml BSA from stock solutions of 1wt% alginate in water, 300mg/ml BSA in water, and plain water? I know I need to use the formula C1V1=C2V2 but I am stuck. I need to figure out how much 1wt% alginate, BSA, and plain water I need to use to make the solution.