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A 50 mL sample of 0.5 M HCl is titrated with 0.5 M NaOH. What is the pH of the solution after 28 mL of NaOH have been added to the acid?
A dose of aspirin is 5.0mg/kg body weight has been prescribed to infant that weighs 8.5lbs. How many miligrams is needed.
Draw a hypothetical titration curve and label the points where .5 equivalents, 1.0 equivalents, 1.5 equivalents, and 2.0 equivalents of base have been added. What is the relative concentration of [H2A], [HA-], and [A2-] at each of those points?
The following reactions take place in the reactor: 2 C2H6 + O2 ------> 2 C2H5OH 2 C2H5OH + O2 ------> 2 CH3CHO + 2 H2O 2 CH3CHO + O2 ------> 2 CH3COOH The oxygen conversion is 82.0%, and the concentration of the ethanol in the product stream is th..
How many total moles of ions are released when the following sample dissolves completely in water? 7.24x 10^20 formula units of NiCl2.
A particular first-order reaction has a rate constant of 1.35x10^2 at 20 degrees C . What is the magnitude of k at 75 degrees C if Ea =85.6Kj/mol?
What is the molarity of the Na 2 S 2 O 3 solution if a 0.150 g sample of KIO 3 required 10.7 mL of Na 2 S 2 O 3 solution for its standardization?
What is the molar mass of a gas if 0.250 g of the gas occupies 215 mL at 618 mmHg and 30.0°C?
To determine the concentration of a sodium thiosulfate solution as in this experiment, a student pipetted 25.0mL of 0.100M potassium iodate (KIO3) solution into a 125mL Erlenmeyer flask. Potassium iodide and sulfuric acid were added as in this exp..
Using the van der Waals equation, calculate the pressure exerted by 15.0 mol of carbon dioxide confined to a 3.00-L vessel at 56.0 oC. Note: Values for a and b in the van der Waals equation: a = 3.59 L2.atm/mol2, and b = 0.0427 L/mol.
Calculate the equilibrium pressure of NO if 2.00 atm and 1.00 atm of O2 are initially placed in a 1.0L container at 440K and the final total pressure in the container
An aqueous solution is 13.0% by mass ethanol, CH3CH2OH, and has a density of 0.978 g/mL. The molality of ethanol in the solution is?
A student titrated 20.0 mL of 0.410M HCL with 0.320M NaOH. Find the pH, [H3O+], and [OH-] when 21.50mL of titrant has been added.
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