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1. What would be the theoretical pH of a buffer prepared by mixing 5.00 mL of 4.0 M formic acid with 1.50 g of sodium formate and the total volume made up to 100 mL.
The Ka of HCO2H is 1.8 x 10-4.
2. Calculate the pH of the buffer if 2.0 mL of 0.0125 M HCl is added to the buffer prepared in question 3. What is the % change in the pH of the buffer?
How many moles of I3-are produced if 25.00 mL of 0.0200 M KIO3 is mixed with 3.00 grams
An aqueous solution of ethanol, C2H5OH, is 19.00% ethanol by mass and has a density of 0.9700 g mL-1. Calculate the molarity of the ethanol solution.
A sample of vanadium haveing 5.67 grams of mass upon heating combined with oxegen of 4.45gramsto make vanadium oxide. Determine the emperical formula for this compound?
you have a 100 mL graduated cylinder containing 50 mL of water. You drop a 175 g piece of brass(density 8.56g/cm^3) into the water. To what height does the water rise in the cylinder?
A gas is confined to a container with a massless piston at the top.A massless wire is attached to the piston. When an external pressure of 2.00 rm atm is applied to the wire, the gas compresses from 5.90 to 2.95 L. When the external pressure is in..
How is the equilibrium yield of C6H12O6 affected by each of the following? 6 CO2(g) + 6 H2O(l) + HEAT C6H12O6(s) + 6 O2(g) (a) increasing PCO2 increases decreases no effect
Calculate the solubility of silver chloride in a solution that is .100 M in NH3. Ksp for AgCl = 1.77x10^-10. Kf for Ag(NH3)2+ = 1.7x10^7
Definition for electrophilic, transition state and Markovnik , electrophilic, transition state
What is the freezing point of a solution of 1.17 g of 1-naphthol, C10H8O, dissolved in 2.00 mL of benzene at 20°C? The density of benzene at 20°C is 0.876 g/mL. Kf for benzene is 5.12°C/m, and benzene's normal freezing point is 5.53°C.
One ecologically important equilibrium is that between carbonate and hydrogencarbonate (bicarbonate) ions in natural water. (a) Th e standard Gibbs energies of formation of CO3
If 5.78 mol of ethane (C2H6) undergo combustion according to the unbalanced equation C2H6 + O2 = CO2 + H2O how much oxygen is required?
Determine the concentration of the sodium hydroxide solution? Considering this balanced equation given as :
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