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What is the pH of the solution formed by adding 2.77 grams of nicotinic acid (M. Wt. = 123.11 g/mol) to 250 ml of 0.050 M NaOH? For Nicotinic Acid Ka=1.4x10-5 and Kb=7.1x10-10
how glycine buffers solutions at either pKa by consuming small amounts of added hydrogen or hydroxide ions
the rate constant for a certain reaction is 8.60times10-3 . if the initial reactant concentration was 0.850 what will
Calculate the density of the sample. Show all work and use significant figures and units.
How would I list the following aldehydes in terms of increasing reactivity ClCH2CHO, CH3CHO, Cl3CCHO, and Cl2CHCHO?
The solution is then allowed to come to equilibrium. Analysis of the equilibrium mixture shows that the concentration of hydroxide ions is 0.000464 M. Calculate the Keq at 25 degrees Celsius for the reaction.
Estimate the pH range over which the color change occurs for bromocresol green. What would be the effect on your results if methyl red indicator, pKa =5.0 were used during the experiment
Uric acid dissociates as shown in the figure at the right with a pKa of 5.80, and can be treated as a simple monoprotic acid in this pH range. Its solubility in urine depends on the relative amount of protonated and unprotonated forms. A urine sam..
The emf of a cell made of a Zn anode and hydrogen cathode immersed in 0.5M ZnCl2 is +0.590V. What is the pH of the solution
The acid-dissociation constants of phosphoric acid (H3PO4) are Ka1 = 7.5 × 10-3, Ka2 = 6.2 × 10-8, and Ka3 = 4.2 × 10-13 at 25.0 °C. What is the pH of a 2.5 M aqueous solution of phosphoric acid
What is the boiling point of water at an altitude where the ambient air pressure is 0.47 bar? The enthalpy of vaporization of water near its boiling point is 40.7 kJ/mol.
The solubility-product constant for Ce(IO3)3 is 3.2e-10. What is the concentration in a solution prepared by mixing 50 mL of O.0250 M Ce with 50 mL of 0.040 M IO3? Back of book has 7.0e-3 M
a typical person has 200 mg of cholesterol pr 100 ml of blood. if the total blood volume of an individual is 5 liters
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