4- Titrimetric methods : are quantitative methods that are based on determining the mass of a pure compound to which the analyte is chemically related. True False
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A: Molarity is defined as the number of moles of solute per litre of solution. Molarity = Number of mol...
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A: Molar mass of S = 32 g/mol Moles of S = mass / molar mass = 2950g/(32g/mol) = 92.1875 mol The molar ...
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A: Given statement is : Explain the reason that the conversion of liquid water to gaseous water has po...
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A: Given :- concentration of hydrocyanic acid = 0.470M To be calculated :- pH of solution pH = -log[...
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A: According to the definition of Chemistry , this question can be explained as follows
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A: Here to calculate total heat evolved in reaction.
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A: Titration is a method to determine the concentration of an unknown solution by using the solution of...
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A: Henderson-Hasselbach equation is given as: pH = pKa + log [Conjug...
Q: 2. What is the mass (in grams) of 7.11 X 102 molecules of tetraphosphorous trisulfide?
A: Given, number of molecules = 7.11×1022 Avogadro's constant = 6.022×1023 molecules.mole-1
Q: 5. Magnesium hydroxide (Mg(OH)2) has a pKsp value of 11.25. In a solution at pH 10, what is the maxi...
A: Given, pKsp of Mg(OH)2 = 11.25 pH = 10 What is the maximum Mg2+ concentration in µmol/L = ? What...
Q: ow much heat is required to raise the temperature of 1.5 x 103 g of water from 45°F to 130.°F? The s...
A: Given, mass of water = 1.5 × 103 g Temperature increase from initial temperature, T1 = 45 oF = 7.22 ...
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A: Given, Initial volume (Vi) = 93.0 L Final volume (Vf) = 89.0 L Pressure (P) = 75.0 atm Work done on ...
Q: 1. As you can see in Fig. 1(C), there is an interaction between A475 on SARS-CoV-2 and S19 on ACE-2....
A: The attraction forces between the different molecules are known as intermolecular forces.
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Q: Calculate the E and identify the type of electrochemical cells of the following: (a) Ag|AgBr (a=0.10...
A: EBr-/AgBr/Ag0 = 0.10 VECl-/AgCl/Ag = 0.22 V Anode: ...
Q: Phenolphthalein has a pKa of 9.7 and is colorless in its acid form and pink in its basic form. For ...
A: Given value from the question, pH= 7.7 pka=9.7
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A: In analytical chemistry, qualitative analyses deals with identification and quality of the compounds...
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A: The reagent(s) in each reaction is shown below along with mechanism also
Q: Determine the empirical formula of a compound containing 2.76 g of silicon and 13.9 g of chlorine.
A: Given, mass of Si=2.76 g, molar mass=28 g mol-1 mass of Cl=13.9 g, ,molar mass=13.9 g , molar mass=3...
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A: Given :- molar concentration of HCl = 0.100 M Volume of HCl solution = 100 mL Molar concentration ...
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A: Molar concentration
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Q: Select the single best answer. Which of the following has more atoms: 3.13 g of hydrogen atoms or 17...
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A: The equivalence point is a point at which the equivalent of an acid becomes equal to the equivalent ...
Q: 10. Give the products for the following reactions: "OH (excess) I (excess) a. 1. Br, H30* 2. HO, A b...
A: 1. 1st reaction is iodoform reaction in which CHI3 precipitated and carboxylate ion are formed in pr...
Q: Liquid octane (CH3(CH,) CH,) will react with gaseous oxygen (0,) to produce gaseous carbon dioxide (...
A: Mass of octane = 3.4 g Mass of oxygen = 21.2 g
Q: 2. How would you carry out each of the following syntheses? Each may require more than one step.
A: Please see the attachment
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A: The mass of water in the water bath is = 3.30 kg The initial temperature of the water bath is = 31.8...
Q: When 0.7521 g of benzoic acid was burned in a calorimeter containing 1,000. g of water, a temperatur...
A: Mass of benzoic acid burned is = 0.7521 g The heat of combustion of benzoic acid s= -26.42 kJ/g
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Q: If you calculated the molar mass of your unknown liquid to be 70.1 g/mol, which of the following do ...
A: Given-> Calculated molar mass of unknown liquid =70.1 gm/mole.
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A: The balance chemical reaction : GeH4 + 3GeF4 ---> 4GeF3H Reaction yield = 92.6 % Number of mo...
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A: Answer The first law of thermodynamics states that the energy of ...
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A: Given, Predict the sign of the entropy change for each of the following processes : (a). I2 (s) ---...
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A: Given-> Volume of HCl = 1.0 ml Normality = 0.10 N Change in pH = 0.09 Volume of solution = 20 ml...
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Q: Show calculations for making 1X TAE gel running buffer and 1.25% agarose gel for your experiment.
A: Buffer is a solution that tends to maintain pH of the solution when acid or base is added to it. Per...
Q: A sample of oxygen gas has a volume of 545 mL at 35°C. The gas is heated to 151°C at constant pressu...
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- Calculate the concentration of stock tetraoxosulphate 6 acid which has mass density of 2.50 and has purity of 98%Calculate the percent error in Avogadro's number calculated by using the following experimental data. Pipette calibrated as 30 drops/mlDiameter of the watch glas:15.5 cmNumber of drops to complete monolayer:23Concentration of stearic acid solution: 1.2x 10^-4g/ml.1) The solvent mixture used in a Paper Chromatography of Metal Ions experiment is a mixture of what two chemicals. 2) Expalin the following terms: Retaintion factor, stationary phase, chromatogrhic mobility elution, detection limit, and resolution. 3) Which of the chemicales used in Paper Chromatography of Metal Ions experiment have hazards associated with them? What are the hazards? Expalin why the ammonia chamber and aueous calcuim sulfide must be kept in faume hood at all times?
- The three standards have different retention times on the Mini-GC. What physical characteristics of the molecules do you think contribute to this?hree components in a mixture have varying distribution constants between the mobile phase and the stationary phass One of the components has a very low distribution constant, Would this component likely elute first or last and how would you design an experiment or modify the components of the separation to make it perform in the opposite manner?What are desirable properties of a gravimetric precipitate?
- Q. No. 5 Write functions and procedure of analysis of various volatile organic molecules by using Gas chromatographyAn active ingredient has a relative molecular mass of 498. What mass of this active ingredient is required to make up 345 cm3 of a solution with a concentration of 0.03 mol dm−3? Give your answer in grams and approximate to 2dp:Topic: Isolation of Crude Ovalbumin from Egg White by Ammonium Sulfate Precipitation(Salting Out) After filtration, 30.0 mL of the filtrate was obtained, and the solution was brought from 0% to 40% saturation by adding the required amount of powdered ammonium sulfate, (NH4)2SO4. Why is there a need to gradually add the ammonium sulfate to the sample?