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1. Calculate the theoretical pH of 0.250 M weak acid, HA. Calculate the theoretical pH of a
2.5 x 10-3 M weak acid, HA, that has a Ka value of 1.2 x 10-4. What happens to % ionization of the weak acid as you dilute the acid?
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.
At 700 K the equilibrium constant for the reaction CCl4(g) C(s) + 2 Cl2(g) is Kp = 0.76. A flask is charged with 2.00 atm CCl4, which then reaches equilibrium at 700 K.
A stock solution of perchloric acid is 70.5% by mass HClO4 and 29.5% by mass water. The density of the solution is 1.67 g·mL-1 at 20 C. Calculate the molarity of the solution.
How many moles of water will be formed from 0.2 mole of CH4 reacting with enough O2. In this reaction CH4+2O2--->CO2+2H2O
A gas mixture is made by combining 7.9 g each of Ar and Ne and an unknown diatomic gas. At STP the mixture occupies a volume of 18.73 L.
Give three reasons why spectrophotometric analyses are performed using a narrow wavelength band centered at ? max. Give the purpose of the following commands:
Write a balanced nuclear equation for the alpha decay of each of the following radioactive isotopes.
A cook wants to heat 1.37 of water from 27.0 to 100.0 .If he uses the combustion of natural gas (which is exothermic) to heat the water, how much natural gas will he need to burn?
in the synthesis of divanillin the first step in the mechanism of this reaction involving vanillin is the formation of phenoxy radical by abstraction of the phenoic H atom
Consider the following reaction at constant P. Use the information here to determine the value of ?Ssurr at 355 K. Predict whether or not this reaction
CO(g)+2H2(g)->CH3OH(g) How many moles of each reactant are needed to produce 3.60 X 10^2g of CH3OH?
What is the mass of the solid NH4Cl formed when 73.0 g of NH3 are mixed with an equal mass of HCl? What is the volume of the gas remaining, measured at 14.0° C and 752 mmHg?
The vapor pressure of is 100 at 5.4, and the normal boiling point is 56.8 . what is enthalpy in vaporation in kj/mol?
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