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You have toseparate 4-toluic acid (a strong acid, pKa 4.36 - look upstructure) from 4-bromoaniline (a base - look up structure).Assume the two substances don't react with each other.
In the titration of acetic acid and NaOH titration the use of the color indicator mandates that excess base be added in order to detect the reaction endpoint.
You have a 1 liter container which contains 0.5 liters of water at 25 degrees celsius that is sealed. You then add 1 μg of phenanthrene to the water. The phenanthrene has a K' H of 0.001 and
When enzymes are present in very low concentrations, their effect on the rate of a reaction can be described using first-order kinetics.
Starting with a 0.1M solution and making a series of 1:100dilutions, how many dilutions must be made to prepare a solution,that on average, has fewer than one molecule of soute per liter of solvent?
How many grams of propane are required to be burnt in order tochange 100g of ice at 0 degrees celcius into steam at 110 degrees celcius?
Suppose you wished to find the percent of alcohol in a alcoholic beverage. Alcohol has a density of 0.79 gram/mL and water has density of 1.00gram/mL. Describe how you would use a hydrometer to acco
You cannot take a TLC and visualize the separation of cis- and trans-2-butene because they are so volatile that they will evaporate before being detected. In theory, which isomer would have the lowe
Compound Xdissolves in water and needs to be extracted with an organicsolvent. Its solubility in toluene is 0.65 g/mL, in ethanol is 20g/mL and in methylene chloride is 12.5 g/mL.
Construct a flow chart for the separation and isolation of triphenylmethanol and 4-ethylaminobenzoate. Includes tructures of all organic compounds and balance any chemicalre actions.
If an 50/50 unknown mixture of a neutral organic compound and a basic compound, or acidic compound isgiven. Just by neutralizing the NaOH and the HCl extracts with the opposite acid/base.
A sheet of steel 2.5 mm thick has nitrogen atmospheres on both sides at 900 C and is permitted to achieve a steady-state diffusion condition.
A hydrate has the following percent compostion: Pb=54.61%,C=12.66%, H=1.61%,O=16.88% and H20=14.24%. What is the formula of the hydrate.
What is the hydronium ion concentration of a 0.35 M solution of sodium acetate is added to the solution? Assume no increase in volume.
At a foundry, 25kg of molten aluminum with a temperature of660.4 degC is poured into a mold. If this is carried out in a room containing 130kg of air at 25deg C.
What are two strong inorganic acids that contribute strongly to the formstion of "acid rain"? Normal rain water would be expected to have pH of about 5.5 So"Acid Rain" is rain with pH lower than thi
The heat lost or gained by a system is related to its temperature change by a property called its heat capacity. The molar heatcapacity of metals at or above room temperature equals 24.92J/K.mol.
Suppose you were asked " what is the mass of a paper clip?"What is the appropriate statistical respond? Include information on variation.
How can pH stay approximately constant when strong base is added to a weak acid with some of its conjugate base present (in the 'buffer' region of the titration curve)
A chemical engineer studying the properties of fuels placed2.366 g of a hydrocarbon in the bomb of a calorimeter and filled it with O2gas. The bomb was immersed in 2.723 L of water and the reaction w
At a certain temperature, hydrogen gas and iodine vapor react toproduce hydrogen iodide gas. Suppose HI(g) at 5.000 x10-1 atm, H2(g) at 1.000 x 10-2atm and I2(v) at 5.000 x 10-3&nb
Chlorine dioxide, ClO2, has been used as a disinfectant in air conditioning systems. It reacts with water according to the equation
Why do chemists prefer to read and record the absorbance, rather than the percent transmittance, of light (electromagnetic radiation) when analyzing a sample having a visible color?
When matter emits a photon, what is the relationship between the energy of the matter before and after the emission (Eatom) and the wavelength (E photon) of the radiation emitted?
A system delivers 487 J of heat to itssurroundings and receives 463 J of work from its surroundings. What is the change in internal energy of the system (in J)?