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A solid weak acid is weighed, dissolved in water and dilutedto exactly 50.0 ml.25.00ml of the solution is taken out and is titrated to aneutral endpoint with 0.10 M NaOH. The titrated portion isthen mixed with the remaining untitrated portion and the pH ofthe mixture is measured.Mass of acid weighed out (grams) 0.633Volume of NaOH required to reach endpoint: (ml) 19.1pH of the mixture (half neutralized solution) 3.26Calculate the following1) What is the pKa of the acid?I know that I'll need to find Ka whichis = ([H+][[A-])/ [HA] but other than that i'm not sure how tostart2) What is the molarity ofthe original acid solution3) What is the molecular weight of the acid?
The saturated vapor pressure of mercury is 0.0020 mmHg at 300 K and the density of air at 300 K is 1,18 g L^-1. (a) Calculate the concentration of mercury vapor in air in mil L^-1. (b) What is the number of parts per million (ppm) by mass of mercu..
If a eukaryotic cell were broken open and the subcellular organelles separated by ultracentrifugation, in which of the following would the citric acid cycles be found
Calculate the maximum bond extension in Angstroms past equilibrium in HCl35 in its first excited vibrational state. The fundamental absorption frequency of this molecule is 2885 cm-1.
A 25.00 mL sample of the weak acid, propionic acid, HPr, of unknown concentration was titrated with 0.104 M KOH. The equivalence point was reached when 35.31 mL of base had been added. The concentration of the original HPr is
if a temperature scale were based on the freezing point 5.5 c and boiling point 80.1 c of benzene and the temperature
a chemist wants to prepare a solution with a freezing point of 22.0degc and has 100.00 g of glycerol on hand. what mass
Consider another expandable balloon is filled with nitrogen gas. The density of the gas is 1.24 g/L and the outside pressure is 1.05 atm. What is the temperature of the gas?
The chemist discovers a more efficient catalysts that can produce ethyl butyrate with a 78 % yield. How many grams would be produced from 8.45 g of butanoic acid and excess ethanol
A mixture of 1 atm chlorine gas and 1 atm oxygen gas and no product undergoes this reaction. Cl2 + 2 O2 ---> 2 ClO2 What equation would be used to solve for the equilibrium concentrations
Cisplatin, an antitumor ingredient, has the formula Pt (NH3)2Cl2. What is the molar mass of cisplatin? Calculate the mass percent of platinum present in cisplantin.
130 ml of an hcl solution with ph of 3.90 is added to 200 ml of an hno3 solution. the resulting solution is 1.40. what
Calculate the pH and the concentrations of all species present H3O+, F-, HF, Cl-, OH- in a solution that contains 0.10 M HF Ka = 3.5*10^-4 and 0.10 M HCl.
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