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100 ml of 1 M acetic acid (pKa 4.76) are placed in a flask. The following volumes of 1 M KOH are added, and the total volume is adjusted to one liter with water.
a) 0 ml, pH = 2.88 d) 25 ml g) 90 ml j) 101 ml
b) 2 ml (answer 3.07) e) 50 ml h) 98 ml
c) 10 ml f) 75 ml i) 100 ml, pH = 8.88
What mass of solid sodium fluoride (molar mass = 41.99 g/mol) should be added to 1.0 L of 0.23M hydrofluoric acid to make a buffer with a pH of 2.94? (Ka of HF = 1.36 x 10-3)
Consider a steel tank whose volume is 49.0 L and which contains O2 gas at a pressure of 18100 kPa at 29°C. What volume would the gas occupy at STP?
Knowing that the arenium ion intermediate has positive charge on the ortho and para carbons, draw each resonance structure - one which shows the positive charge on the ortho carbon and one which shows the positive charge on the para carbon. You wi..
Given stock solutions of glucose (1M), aparagine (100 mM) and NaH2PO4 (50 mM), how much of each solution do you need to prepare 500 mL of a reagent that contains 0.05 M glucose
determine how many pounds a citizen would have to weigh in order to have ice melt beneath his/her ice skates. Do a bit of research and find out the area if cibtact betweeb a typical ice skating blade and the ice surface
The sucrose is being converted to other sugars in a reaction which is first-order with respect to the sucrose concentration. Exactly 30 minutes later, the sucrose concentration has fallen to 0.131 mol/L. Calculate the value of the rate constant in..
what will be the final temperature of the system when thermal equilibrium is attained
A tank is being filled through a valve by an ideal gas where the following applies: H=30*T(K) in J/mol for gas, R=8.314 in J/mol/K, H=40 T(K) for the liquid in J/mol (gas as liquid, different reference point than gas)
The original volume is 70. cm3. If the combustion of this mixture releases 855 J of energy, to what volume will the gases expand against a constant pressure of 640. torr if all the energy of combustion is converted into work to push back the pisto..
What structural similarities exist between indigo, tyrian purple, alizarin, picric acid, and the main component of mauveine? The compounds beta-carotene and crocetin are not listed as part of this group
What is the kinetic energy of the emitted electrons when cesium is exposed to UV rays of frequency \rm 1.5\times 10^{15}~Hz
What is the value of the equilibrium constant at 500 K for a chemical equilibrium that as a delta H value of 250 kj/mol and a delts S value of 48 J/mol K?
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