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A sample of 25.00 mL of .200M Butyl amine in a flask, (find Kb for this amine in literature) is titrated with .10 M HNO3 solution at 25 C.
The base dissociation reaction is:CH3CH2CH2CH2NH2 + H20 <-> CH3CH2CH2CH2NH3 + OHthe acid-base reaction is:CH3CH2CH2CH2NH2 + H <-> CH3CH2CH2CH2NH3
1. caculate the volume of the acid soultion needed to completly neutralize the base in the flask2. Caculate the pH for (a) the inital base solution in the flask; (b) the point at which 20mL of the acid has been added; (c) the equivalence point, and (d) the point at which 40.00 mL of the acid has been added.
Arrange the following in order of decreasing acidity. I. benzoic acid (C6H5CO2H) II. benzyl alcohol (C6H5CH2OH) III. phenol (C6H5OH)
A student was preparing to recrystallize a solid using mixed-solvent recrystallization. He planned to dissolve the sample in boiling methanol, and then add hot pentane to induce crystallization
A 100.0 g copper sample (specific heat = 0.385 J/goC) at 100.0oC is added to 50.0 g water at 26.5oC. What is the final temperature of the copper-water mixture?
a piece of 122 grams metal with is placed in a 50 ml graduated cylinder. determine what would be the density of the
carried through the analysis, the error in determining the analyte is +6.3%. (a) Determine the appartent recovery for the analyte if R1=0. (b) deter,ome the apparent recovery for the interferent if Ra=1.
adding the two portions of water into your calorimeter the temperature of the mixed portions of water to be 45 oC. determine the heat capacity of the calorimeter?
Dry ice, CO2 (s), has a melting temperature of -78o C and will not form a liquid unless atmospheric pressure exceeds 5.1 atm. The following reaction is conducted at -90o C and 101.325 kPa: CO2 (g) ? CO2 (s)
If 200 mL of 0.300 M Cr(NO3)3(aq) is added to 100 mL of 4.0 × 10^-4 M NaF(aq) at 25 degrees celcius, will a CrF3 precipitate form? For CrF3 in water at 25°C, Ksp = 6.6 × 10^-11.
The vapor pressure for methanol and ethanol at 50 C is 406 and 222 Torr, respectively. Calculate the total vapor pressure of a mixture at 50 C that contains 0.2 mol of methanol and 0.1 mol of ethanol.
Give a reason why each of the following names are incorrect by the IUPAC system and give a correct IUPAC name. Methyl propanoate as the name of the product of the reaction between ethanol and ethanoic acid.
What is the difference in volume (in mL) between the water vapor and liquid water? (Assume the density of liquid water is 1.0 g/mL.) C. Why is it dangerous to heat a closed container of liquid to its boiling point?
A compound contain 60.87% carbon, 4.38% hydrogen, and 34.75% oxygen then determine its empirical formula?
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