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Make pH 5.00 buffer containing a mixture of acetic acid and acetate ion. This buffer is to be prepared by mixing 25.0 mL of 0.1 M HCl with the correct mass of solid sodium acetate. You will determine the mass of solid sodium acetate needed.
Magnesium hydroxide is only very slightly soluble in water. The reaction by which it goes into solution is: Mg(OH)_2 (s) Mg^2+ (aq) +2 OH- (aq)
Calculate the entropy change for vaporization of 18 g of H2O. The molar enthalpy of vaporization for water is 44 kJ/mol and the boiling point
Explain why a determination of the rate law can never prove a proposed reaction mechanism but can sometimes disprove
Compare lattice energies of LiI and PbI2 and calculate the formation enthalpy in each case by constructing a Born-Haber cycle. Which one is more ionic? Comment.
A 26.0-g sample of ice at -10.0°C is mixed with 114.0 g of water at 72.0°C. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
Lysine is an amino acid that is an essential part of nutrition but which is not synthesized by the human body.
Write a balanced equations for the formation of the following compounds from their elements
dissolved in 200 mL of solution. What is the pH of the solution? pKa1 = 6.37 and pKa2 = 10.25.
What is the molarity of a solution which contains 58.5g of sodium chloride dissolved in 0.500 L of solution?
Write a balanced equation including states of matter for the reaction of Zn(H2O)4 2+ in aqueous NaCN. You can assume sodium is a secator ion and does not need
When using paper chromatography to separate components of a mixture, the manual suggests that water is wicked through the paper.
To determine the empirical formula of ester, 1.02g of the ester was burnt completely in excess oxygen. The only products formed were 2.20g of carbon dioxide and .90g water vapor. Calculate the mass of oxygen in 1.02g of the compound.
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