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1. A student dissolves 0.01 mol of an unknown weak base in 100 ml water and titrates the solution with 0.1 M HNO3. After 40 ml of 0.1 M HNO3 was added, the pH of the resulting solution was 8.0. Calculate the Kb value for the weak base.
2. A 10 gram sample of the ionic compound NaA, where A is the anion of a weak acid was dissolved in enough water to make 100 ml of solution and was then titrated with 0.1 M HCL. After 500 ml HCL was added, the pH was 5. The experimenter found that 1 L of 0.1 M HCL was required to reach the stoichiometric point of the titration
A) what is the molar mass of NaA?B) Calculate the pH of the solution at the stoichiometric point of the titration.
3. The concentratioin of Ag in a solution saturated with Ag2C2O4(s) is 2.2*10^-4M. Calculate the Ksp for Ag2C2O4.
A 0.1000 m aqueous solution of a weak acid, HA, is 1.5% ionized. At what temperature does it freeze? Kf for water = 1.86°C/m.
calculate the final temperature of the water after all the ice melts. heat capacity of H2O: 37.7 J/mol*k heat capacity of H2O l: 75.3 J/mol*k enthalpy of fusion of H2O: 6.01 kJ/mol
Other than S=C=S; can I have S triple bonded to C single bonded to S? Wouldn't there be three electrons left on the triple bonded S; it would be sharing three when it started with six I don't understand? Help please.
What wieght of glycine (pka1=2.4, pka2=9.6) and what volume of 0.5 N(normality) HCl would be necessary to make 100 mL of 0.2 M buffer pH 2.4?
Give the major product of the following reaction: 1-butene with Br2 in Low concentration. I have tried 3-bromo-1-butene
what is the molarity of a solution of silver perchlorate agclo4 if 3.2 moles of silver perchlorate is dissolved in 1.5
the dichloromethane layer is now 31 mg of benzoic acid. What is the partition Coefficient (Kp) of benzoic acid in dichloromethane/water?
What volume of a stock 0.0242 M of KOH solution is required to titrate 0.147 g of oxalic acid dehydrate, H2C2H4 . 2H2O to a phenolphthalein endpoint?
The calorimeter contains exactly 281 g of water, and the temperature increases by 1.126°C. Calculate the heat given off by the burning Mg, in kJ/g and in kJ/mol.
A room contains 12,000 ft.³ of air at 75°F and 29.7 inches Hg Absolute. The air has a dew point of 60°F. How many pounds of water vapor are in the air
Determine the new volume of a 1.3 L balloon if it is taken from room temperature that is twenty five degree celsius and placed into a freezer at the temperature of -11.5 degree celsius.?
The metal is obtained from seawater in a process that includes precipitation, neutralization, evaporation, and electrolysis. How many kilograms of magnesium can be obtained from 4.18 km^3 of seawater
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