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A 0.010 M aqueous solution of a weak acid HA has a pH of 4. What is the degree of ionization of HA in the solution?
What is the pH of a buffer composed of 0.02 M KCN and 0.30 MHCN? Write the net ionic equation for the reaction that occurs when 0.01 M HCl is added to this buffer.
Use the pH values obtained in steps b-e above to make a plot of the titration curve. Label the calculated pH values on the plot. Label the buffer region and the equivalence point. Was the choice of
A sample of O2 (g) is collectede over water at 24degrees C. The volume of gas is 1.16L. In asubsequent experiment, it is deterrmined that the mass ofO2 present is 1.46 grams. What mu
What is the total heat evolved when a saturated solution of boricacid in 1000g of water is cooled from 100°C to20°Celsius? (Take the heat capacity of the solution to be thesame as that of wa
What two alcohols would you use if your goal was to synthesize hexyl pentyl ether via acid-catalyzed dehydration of two alcohols?
Two lead strips (anode and cathode) connected to a small battery are placed in a beaker of lead(II)nitrate solution. A thinlayer of substance is formed on the outside of the cathode.
Calculate the percent carbon in capsaicin,C18H27NO3, the compound that gives the hot taste to chili peppers ?
If 930. mL of 0.1063 M aqueous HCl and 0.04800 mol of solid MnS are reacted stoichiometrically according to the equation, what mass (g)of solid MnS remained?
When carrying out the acid-base extractions in lab, you notice that you were asked (in the "Hints of Preparation") to extract with sodium bicarbonate only once while the procedure directs you to car
In the separation of benzoic acid, 4-tertbutylphenol, and biphenyl, what would occur if sodium hydroxide had been used in the first extraction?
A sample of gas as 1/2 atm pressure occupies a volume of 158 ml, if temperature is held constant, what will be the new pressure if the volume is decreased to 123 ml?
Ethanolamine, HOC2H4NH2, is aviscous liquid with an ammonia like odor; it is used to remove hydrogen sulfide from natural gas. A 0.15 M aqueous solution of ethanolamine has a pH of 11.34. Wh
A solution of acetic acid, CH3COOH, was left on alab shelf with an unknown concentration. The pH was found tobe 2.68. What is the concentration of the acetic acid?
A solution is made by taking 100.0 mL of 4.0 ×10-3 molar NaOH(aq) and mixing in 10.0 mL of4.0 × 10-2 molar HCl(aq). A small portionwas tested using thymol blue indicator, for whi
If 0.0394 M aqueous KCl is produced stoichiometrically according to the balanced equation in a reaction solution with a total volume of1270 mL, what volume (L) of gaseous SO2 measured at STP is
Suppose the 14C/12C ratio in plants athousand years ago was 10% higher than it is today. What effect, if any, would this have on the calculated age of an artifact found to be 1000 years old by
Radium-226 decays by alpha emission to radon-222. suppose that 25.0% of the energy given off by one gram of radium is converted to electrical energy.
How do you know whether or not an element can be a cathoid or an anode and which cathoids and anodes can be combined. does it have something to do with the sign?
If 930 mL of 0.0185 M aqueous Na2CO3 and 800 mL of 0.0413 M aqueous HCl are reacted, what volume (L) of gaseous CO2 measured at 0.5 atm pressure and 309 Kis produced.
A certain soft drink was analyzed and found to contain 0.080 M H+. Other ingredients of the drink include sugaror, in the diet form of the drink, an artificial sweetener.
An exothermic reaction A-->B, was carried out in dilute aqueous solution in a calorimeter. 80.0mL of deionized water was in the calorimeter and 0.24 mole of A is used.
The reaction of phenylmagnesium bromide with benzophenone to formthe salt of triphenylmethanol is an example of nucleophilic addition; its reaction with ethyl benzoate to yield the same product invo
The energy of a vibrating molecule is quantized much like theenergy of an electron in the hydrogen atom. The energy levelsof a vibrating molecule are given by the equation En= (n + 1/2 )
Ammonia gas is produced commercially from the reaction of nitrogen and hydrogen. What volume of ammonia can be produced from the reaction of 5.5 x 103 kg of N2 and 1.5 x103 kg of H2?