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a buffer is made using 45.0 of 0.750 M propanoic acid (Ka=1.3x10^-5) and 55.0 ml of 0.700 sodium propanoate. what is the pH of the buffer. what is the pH after 4.91 ml of 1.00 M sodium hydroxide is added?
If you electrolyze 150. g CH3SO2F, how many grams of HF are required and how many grams of each product can be isolated
The Greek mathematician Archimedes is credited with discovering how to verify the amount of pure gold in an irregularly shaped object (e.g., a crown) by placing it in water. How much water should be displaced by a pure gold object having a mass of..
Classify the substances CaCl2, CuSO4, NH3, C2H5OH according to the strongest solute-solvent interaction that will occur between the given substances and water during dissolution from the following choices
what is the standard-state heat of reaction for the dissociation of dinitrogen tetroxide b.) determine the equilibrium composition of this mixture of 50C and 0.1, 1, and 10 bar. c.) repeat the calculation at 200C
Carbon-14 dating can be used to estimate the age of formerly living materials because the uptake of carbon-14 from carbon dioxide in the atmosphere stops once the organism dies
Identify the conjugate base of each of the following compounds: HNO2, HClO, H3PO4, and NH3. Identify the conjugate acid of each of the following species: NH3, ClO2-, SO4^2-, and OH-
Given: Volume of He sample = 72.5mL Temperature = 30 C Atmospheric pressure = 785 mmHg Equilibrium vapor pressure of water at 30 C = 31.88 mmHg What is the ratio of average molecular velocity between He(g) and H2O(g)
Arrange the following aqueous solutions in order of deceasing freezing points: 0.10 m KNO3,0.10 m BSCl2,0.10 m ethylene glycol [C2H4(OH)2,antifreeze], and 0.10 m Na3PO4. Explain.
a sample of an ethanol-water solution has a volume of 54.2 cm3 and a mass of 49.6g. what is the percentage of ethanol in the solution?
Sn2 reactions occur at different rates depending on the structure of the substrate in the reaction . Would an Sn2 reaction occur at a faster rate on a primary or a tertiary substrate ? Briefly. Explain your answer
An equilibrium mixture contains 0.450 mol of each of the products (carbon dioxide and hydrogen gas) and .200 mol of each of the reactants (carbon monoxide and water vapor) in a 1.00 L container.
Why does surface complex formation with a weak acid lead to a relative maximum in the extent of surface complex formation (adsorption) at a pH which is usually near the value of -log acidity constant of the weak acid (pKHA)
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