Given for H2X: Kat = 4.5 x 10; Ka2 = 1.2 x 10 1 The concentration of X "in a 0.150 M aqueous solution of the diprotic acid H2X is %3D a. 0.000000099 M b. 0.0000000020 M C.0.00082 M d. 0.000000000012 M e. none of the above
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- You work with two amino acids. Tryptophan (MW=204 Da) and Methionine (MW=149 Da). You make varioussolutions of each amino acid separately and compare them When you compare two solutions at the same percentage concentration (e.g. 1%), there are moremoles of Tryptophan in solution than moles of Methionine because the molecular weight of Tryptophan ishigher. When you compare two 1-liter solutions containing these amino acids at a 10mM concentration, thereis the same number of amino acid molecules in each solutionA chemist receive different mixtures for analysis with the statement that it contain NaOH, NaHCO3 , Na2CO3 or compatible mixtures of these substances together with the inert material. From the data given, identify the respective materials and calculate the percentage of each component. 1.000g samples and 0.2500 N HCl were used in all cases. Sample 1 With phenolphthalein as the indicator, 24.32 ml of HCl was used. A duplicate sample required 48.64 ml HCl using methyl orange as the indicator. Sample 2. With phenolphthalein as the indicator it uses 28.2 ml of HCl to make it colorless and added with methyl orange indicator and uses 11.3 ml of HCl to reach the end point.Based on the following molarities obtained,1.00 x10^-1 , 1.04 x10^-1 and 1.0 2x10^-1. fine the average molarity and standard deviation.
- Pure toluene (C7H8) has a normal boiling point of 111.0°C, and the Boiling Point Elevation Constant is 3.40°C. When 25g of compound A (MM=100) is dissolved in 500g of Toluene, the boiling point of the solution is 113.2°C. Therefore, the activity coefficient of the compound (γA) in the solution is approximately: a) 1.3 b) insufficient data c) 0.65 d) 0.8 (The answer according to the professor is 1.3, but I have tried and can't get that answer, thanks for the help)The distribution coefficient of hydrogen sulfide between benzene and water at 25 degrees Celsius is 5.9880. What is the minimum volume of benzene at 25 degrees Celsius necessary to extract in a single step 80% of the hydrogen sulfide from 1 liter of 0.15 molar aqueous solution of hydrogen sulfide?a.) 0.1336b.) 23.9520c.) 0.6680d.) 1.5030E.) none of the aboveThe partial molar volumes of acetone and chloroform, in a solution in which the molar fraction of chloroform is 0.4693, are 74.166 cm3mol-1 and 80.235 cm3 mol-1, respectively. What is the volume of 1,000 kg of this solution? Data: M.M. (acetone) = 58.08 gmol-1; M.M. (chloroform) = 119.07 gmol-1.
- Use the follow data below and answer the following questions: Component Concentration (mg/L) CO2 8 Ca2+ 45 Mg2+ 13 Sr2+ 12 Alkalinity 270 Determine the quantity (mass flow) of CaO and Soda Ash using practical solubility limit required to treat hard water taking volumetric flow as 145000 L/d and pH of 7.5 and purity of both reagents as 97%.Calculate the molar conductivity of NH4OH at infinite dilution if the following data are known: Λo (NaOH) = 248 x 10-4 siemen mol-1 m2, Λo (NaCl) = 126 x 10-4 siemen mol-1 m2 Λo (NH4Cl) = 150 x 10-4 4 siemen mol-1 m2Perform the necessary calculations for the preparation of: d) 100 mL of sulfuric acid (98.08 g / mol) 0.1 N, whose label says 97.5% by weight and density 1.84 g/mL e) 300 mL of barium chloride at 5% p/V f) 150 mL of a 0.02 M NaCl solution, starting from a 0.1 M NaCl solution
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