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Calculate the ionization constant for each of the following acids or bases from the ionization constant of its conjugate base or conjugate acid:
(a) F-
(b) NH4 +
(c) AsO4 3-
(d) (CH3)2NH2+
(e) NO2-
(f) HC2 O4 - (as a base)
Determine whether aqueous solutions of the following salts are acidic, basic, or neutral:
(a) Al(NO3)3
(b) RbI
(c) KHCO2
(d) CH3NH3Br
What is [H3O+] in a solution of 0.075 M HNO2 and 0.030 M NaNO2? HNO2(aq) + H2 O(l) ? H3 O+(aq) + NO2 -(aq)Ka = 4.5 × 10-5
Calculate the pH of a buffer solution prepared from 0.155 mol of phosphoric acid, 0.250 mole of KH2PO4, and enough water to make 0.500 L of solution
Draw a curve similar to that shown in Figure 14.23 for a series of solutions of NH3. Plot [OH-] on thevertical axis and the total concentration of NH3 (both ionized and nonionized NH3 molecules) on the horizontal axis. Let the total concentration of NH3 vary from 1 × 10-10 M to 1 × 10-2 M.
A 27.0-g sample of water at 270. K is mixed with 49.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
What makes Maleic acid (isomer of but-2-enedoic acid), very soluble in water and only sparingly soluble in CCl4
nitroglycerin contains 60 as many carbon atoms as hydrogenatoms three times as many oxygen atoms as nitrogen atoms and
An 80.0-gram sample of a gas was heated from 25 °C to 225 °C. During this process, 346 J of work was done by the system and its internal energy increased by 7805 J. What is the specific heat of the gas
Calculate the standard reaction enthalpy for the formation of boron trifluoride, which is widely used in the chemical industry:B2O3(s) + 3CaF2(s) > 2BF3(g) + 3CaO(s).
How many grams of solid aluminum sulfide can be prepared by the reaction of 11.0 g of aluminum and 16.4 g of sulfur and how much of the non-limiting reactant is in excess
Use Slater's rules to calculate the shielding constant and effective nuclear charge for a 5s, 5p, and 4d electron in the tin atom. Which of these electron experience the lowest effective nuclear charge
an excited state of the li atom has electrons occupying two spatial orbitals 1s and 2px. what are all the possible
How many grams of cobalt (III) chloride and of hydrogen fluoride are needed to prepare 100.00 grams of cobalt (III) fluoride
Draw the two possible intermediates of the reaction shown. Draw the complete structures of all of the possible products that are formed from these intermediates.
a student measured 50.0 ml of a salt water solution (density=1.021 g/ml) into a flask. The Cl minus in the measured sample required 16.67 ml of 1.0466 M AgNO3 solution to reach the end point.
Write equation for the reaction : Mg+H2SO4(diluted) Identify the oxidizing agent and the reducing agent.
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