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A beaker with 1.50×102mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M. A student adds 7.20mL of a 0.330\it M \rm HCl solution to the beaker. How much will the pH change? The {\rm p}K_{\rm a} of acetic acid is 4.760.
Since most potassium salts and nitrates are soluble in water, PbCrO4 must be the precipitate. The equation for this reaction is: Pb2+ + CrO4 2- -> PbCrO4. Calculate the theoretical yield using the starting quantities of both reactants.
A solution containing 6.3 X a0^-8 M benzene and 2.0 X 10^-7 M cyclohexane gave peal areas of 3950 and 4870, respectively, in a GC experiment.
A container holds 2,0 of gas. the total average change in KE of gas molecules in the container is equal to the the sum of KE of an 8,0x10^-3 -Kg bullet with speed of 770 m/s.
The density of liquid octane, C8H18, is 0.7025 g/ml. If 1.00 mL of liquid octane is vaporized at 100 degrees Celsius and 725 torr, what volume does the vapor occupy?
In formation of the Grignard reagent Mg is converted to magnesium with a plus two oxidation state. Circle the reaction type magnesium is undergoing.
The solubility of the ionic compound M2X3, having a molar mass of 205 g/mol, is 3.16 10-7 g/L. Calculate the Ksp of the compound.
Predict whether a reaction will occur in aqueous solution between the following pairs of substances. If a reaction does occur derive the net ionic equation. Specify the driving force : Precipitate formation (P) Water formation (W)
Octane (C8H18(l)) is a key component of gasoline. How much energy (enthalpy) in kJ is released from the combustion of one mole of octane? How much energy is released from the combustion of one gram of octane?
vinegar is a 5.0% solution by weight of acetic acid (CH3CO2H)in water. given that the ph for acetic acid is 2.41, the ka=1.8X10-5 and assuming the density of vinegar to be 1.00g/cm3, what is the percent dissociation for acetic acid in vinegar?
Calculate the mass of propylene glycol ({rm{C}}_3 {rm{H}}_8 {rm{O}}_2 ) that must be added to 0.340 kg of water to reduce the vapor pressure by 2.86 torr at 40 ^circ ,{rm C} (P_{{rm H}_2{rm O}} at 40 ^circ,{rm C} = 55.3;{rm torr}).
What is the molecular formula for the alkane with 39 carbon atoms? What is the molecular formula for the cycloalkane with 38 carbon atoms?
why a bromine radical is more selective than a chlorine radical during abstraction of a hydrogen on a hydrocarbon?
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