When choosing a pair of solvents for a mixed-solvent recrystallization, what factor is most important? Group of answer choices a)The miscibility of the solvents. b)The similar size/molar mass of the solvents.
Q: What is the mass percentage of O in C₃H₈O₂? A) 21.03% B) 57.94% C) 72.58% D) 42.06%
A:
Q: AH°f of HCl (g) is kJ/mol.
A:
Q: Question 12 What is the ¹H NMR splitting pattern of the indicated hydrogen? O quintet H O multiplet
A:
Q: A solution is prepared at 25 °C that is initially 0.16M in acetic acid (HCH3CO₂), a weak acid with…
A: In this solution a acetic acid is a weak acid , and sodium acetate is its salt , so it will make a…
Q: Xylometazoline hydrochloride paediatric nasal drops are formulated as a 0.05% w/v solution. What…
A:
Q: Give a detailed mechanism of following reaction. Show the major product and give the IUPAC name of…
A:
Q: Question 1: what do you mean by calorie? Explain the units of Cal, cal and Joule. + BIVAN LEEXEE…
A: As per bartleby guidelines I answered only first question so please don't mind thanks in advance.…
Q: When chloroethane is treated with lithium metal, as shown below (step 1), an alkyllithium reagent A…
A: Alkyllithium compound is the most common carbanion reagents in laboratory-scale synthetic chemistry;…
Q: 3.11 mL of seawater contains about 1.31×10-14 moles of gold, how many atoms of gold are in that…
A:
Q: Determine the concentration of each component (C2) in the final mixture for each run (refer to Table…
A: Since you have asked multiple questions, we will answer only first question for you. In order to get…
Q: Some vapor pressure data for ethanol/water solutions at 298 K are given in the table below. Plot…
A: To calculate Henry's Law constant for: (a) ethanol in water (b) water in ethanol
Q: Complete the following table by calculating the missing entries. In each case indicate whether the…
A: # 1st row of the table: pH of the solution, pH = 5.10
Q: What volume in mL of 0.300 M NaF would be required to make a 0.0355 M solution of NaF when diluted…
A:
Q: What is the empirical formula of copper chloride for this lab?
A: Mass of copper chloride taken for analysis = 2.021 g Mass of copper(Cu) produced is equal to the…
Q: What is the concentration in %w/v of a 0.425 M aqueous solution of methanol (MM = 32.04 g/mol)? A)…
A: Given, Molar Mass of Methanol = 32.04 g/mol Molarity of methanol = 0.425 M
Q: A compound has the following percent compositions. Find the empirical formula of this compound.…
A:
Q: Identify which compound is expected to have a lower pk, value: 1
A: Given : structure of molecules. Tip : pKa value is inversely proportional to Ka value
Q: Write the steps of writing these chemical elements in Excel?
A: Press CTRL+1. Under Effects, check the Superscript or Subscript box, and click OK.
Q: It takes 52.0 J to raise the temperature of an 9.00 g piece of unknown metal from 13.0∘C to 25.0 ∘C.…
A: Specific heat capacity(c): The amount of heat energy(Q) is required to raise the temperature of a…
Q: Write a balanced net ionic equation to show why the solubility of Mg(OH)2(s) increases in the…
A: Data given Suppose the strong acid = HCl • The balanced equation is :- When Mg(OH)2 reacts with…
Q: Propose a feasible synthesis trans-stilbene without using catalytic hydrogenation or β-elimination…
A:
Q: What is the specific heat of silver?
A: Specific heat ---- The heat requires to raise the temperature of one gram of substance by one degree…
Q: Balance the chemical equation, with the states of matter, describing the complete combustion of…
A: To solve this problem we have to write the complete balance chemical equations of combustion of…
Q: A HCN / NaCN buffer system is to be constructed that is also 0.048 M in Mg2+ What is the minimum…
A: Given :
Q: Consider the following reaction, equilibrium concentrations, and equilibrium constant at a…
A:
Q: Calculate the mass percent by volume of 65.1 g of glucose (C₆H₁₂O₆, MM = 180.2 g/mol) in 325 mL of…
A:
Q: 2,4-dimethylpentan-3-one 3,3-dimethylpentane-2,4-dione 3-methylpentane-2,4-dione…
A:
Q: What is the pH of a solution of 0.400 M CH₃NH₂ containing 0.300 M CH₃NH₃I? (Kb of CH₃NH₂ is 4.4 ×…
A:
Q: Balance the following chemical equations (include the states of matter): The reaction between…
A:
Q: What is the concentration of lithium ions in 0.190 M Li₂HPO₄?
A:
Q: If you did not properly dry the beaker before adding the sample, how would this influence the final…
A: It is given beaker is not properly dry before adding the sample.
Q: Aqueous solutions of cations (orange) and anions (green) are mixed, with results as shown below.…
A:
Q: Calculate the mass percent by volume of 87.6 g of glucose (C₆H₁₂O₆, MM = 180.2 g/mol) in 325 mL of…
A: The mass of solute in grams present in 100 mL of solution is known as the mass percent concentration…
Q: 6. C5H10O2 CsHa(s)+2 -CSH12 CSHO 212=1d.v. 3.5 3.0 2.5 L 2.0 1.5 1.0 ppm
A: Molecular formula C5H10O2 Degrees of unsaturation = 1
Q: 1. Which of the following are true of polar covalent compounds A: Soluble in water B: Soluble in oil…
A: Ionic compounds are compounds that are composed of oppositely charged ions held together by strong…
Q: Problem 16.67 Calculate the percent ionization of hydrazoic acid (HNS) in solutions of each of the…
A: Calculate the percent ionization of hydrazoic acid (N3H) in the given solutions.
Q: (v) (vi) Ph 10-t CO₂H CH,Ph Ac₂O, TSOH (i) LDA then Mel (ii) P(OME)3, heat PhS á OH CH,Ph
A:
Q: te strong acid.
A: Step1 :- Given in following question a statement A concentrated weak acid cannot have a lower PH…
Q: A solution contains 0.155 M potassium cyanide and 0.171 M hydrocyanic acid. The pH of this solution…
A:
Q: the free energy for a reaction can be related to the equilibrium constant through the formula below.…
A: When solid borax is added to water, the following equilibrium is established.…
Q: 04 4 + ryot Br 14. For the reaction below, predict the MAJOR product th product shown. OH HC1, H₂O…
A:
Q: Ob Which bond (a or b) is longer? NO₂ a O a O₂N O neither -I NO₂
A: Here we are required to find which bond is longer
Q: Which of the following statements is true about the functional role of His E7 in hemoglobin? a. For…
A: His- E7, which is thought to stabilize bound O2 by hydrogen bonding and inhibit CO in hemoglobin .
Q: Complete the following solubility constant expression for CaCO3. K = sp X 00
A:
Q: An analytical chemist is titrating 196.9 mL of a 0.1800M solution of piperidine (C-H₁0NH) with a…
A: Volume of piperidine = 196.9 mL Concentration of piperidine = 0.1800 M Volume of HNO3 = 209.3 mL…
Q: A buffer solution is prepared by adding 12.27 g of sodium acetate (NaC₂H302) and 16.19 g of acetic…
A:
Q: In the presence of excess OH, the Zn2+ (aq) ion forms a hydroxide complex ion, Zn(OH)42-. Calculate…
A: Given data :
Q: What is the equilibrium Ag+ concentration when 2.48 L of a 0.160 M silver acetate solution are mixed…
A:
Q: A volume of 125 mL of H2O is initially at room temperature (22.00 ∘C). A chilled steel rod at 2.00…
A:
Q: 4.5 The correct R or S configuration for the given compound is? H. OH I A. R B. S C. 2(R) D. The is…
A: R And S nomenclature : The rules are used to establish the priority of the groups attached to the…
Step by step
Solved in 3 steps
- What property does the separating funnel exploit for separation? A. Size b. miscibility c. volatility d. SolubilityFor results/conclusions Using the images attached Write 2 paragraphs 1st paragraph: Starts with Objective. Results of DeltaT and i stated 2nd paragraph: sources of errors discussed The objective is The colligative properties are the properties that undergo a change when a solute is introduced to a solvent. Freezing point depression is also a colligative property. The addition of a solute to a solvent reduces the freezing point of the resulting solution. The freezing point of the solution is always lower than the freezing point of the solvent. This difference in the freezing point between solvent and solution is called freezing point depression. The freezing point depression is directly proportional to the molality of the solution or the number of moles of solute present in the solution.An ideal solvent to use for recrystallization is one that: Group of answer choices dissolves the desired compound in ice-cold water temperature but does not dissolve the desired compound at its boiling temperature. a solvent in which the desired compound dissolves at any temperature. a solvent that reacts with the desired compound. dissolves the desired compound at its boiling temperature but does not dissolve the desired compound in ice-cold temperature.
- 2. When performing the recrystallization of an impure solid, why is it advised to use the minimal amount of solvent possible? Group of answer choices To minimize the amount of pure solid lost due to its solubility. To minimize the cost of the recrystallization. To reduce the time needed to filter the pure solid from the solvent after recrystallization. To minimize the amount of hazardous materials used.Extraction is the process by which a solute is separated from a solution using a solvent that is miscible to the first solvent. In this process, the solute dissolved in the solvent which is extracted due to its reaction to the second solvent where the solute is more soluble. True FalseHow do we keep relative supersaturation low by controlling solubility? solubility should be higher solubility should be constant solubility should be lower solubility should be fluctuating
- Which of the following solvent systems are not suitable for binary solvent recrystallization? |water and heptane water and ethanol water and toluene water and methanolGiven these values, find the initial mole fraction and initial mass % of the solute (sucrose) Solvent (water) weight: 200g Solute (NaCl) weight: 232g Solute (NaCl) Molar mass=342.3 moles of solute (NaCl) = .678(c) Are the strengths of the interactions between the particles in the solute and between the particles in the solvent before the solute and solvent are combined greater than, less than, or equal to the strengths of the interactions between solute particles and solvent particles after dissolution? Explain.
- Why is potassium hydrogen phthalate (KHP) used to standardize the NaOH solution instead of measuring out a known mass of solid NaOH to be dissolved in water? KHP is an acid and will neutralize some of the NaOH to use later. O There is no reason, NaOH solutions can be used without standardization. O Solid NaOH is hygroscopic and will absorb water, making it virtually impossible to determine a true initial mass and therefore changing the concentration of the solution. Solid NaOH evaporates therefore its concentration can never be known.A sodium sulfate solution is measured at 2.2 molal in pure water at a source company. (sodium sulfate molar mass = 142.05 g mol) The lab needs to report the concentration in molarity. What is the final molarity of the sodium sulfate solution? (density of water = 1.0 g mL¯' ; density of the solution = 1.2 g uestion 4 %3D mL-1). (the answer should be entered with 3 significant figures; do not enter units; give answer in normal notation--examples include 1.23 and 120. and -123 and 123. and 12.3) Question 4 of 29> AMoving to another question will save this response. 888. P11 64 F12 eIC " 24 4 & 7\ 3 5 6. 8. %3D dele E R T Y A S D L F G K Z C N alt alt option command command optionA standard solution is prepared by diluting the stock solution and used in chemical analysis for preparing the standard curve. Larutan piawai disediakan dengan melakukan pencairan larutan stok dan digunakan dalam analisis kimia untuk penyediaan lengkuk piawai. A) Illustrate how do you prepare a stock solution of 0.01 g of NaNO2 in one liter of distilled water in laboratory.